Настройки

Укажите год
-

Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

Подробнее
-

Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

Подробнее

Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Укажите год
Укажите год
Применить Всего найдено 339. Отображено 143.
09-05-2017 дата публикации

Material for use in a magnetic resonance system, method for producing the material and magnetic resonance system

Номер: US0009645208B2
Автор: Stephan Biber, Yvonne Candidus, Hubertus Fischer, Robert Greiner, Thomas Kundner, BIBER STEPHAN, CANDIDUS YVONNE, FISCHER HUBERTUS, GREINER ROBERT, KUNDNER THOMAS, Biber Stephan, Candidus Yvonne, Fischer Hubertus, Greiner Robert, Kundner Thomas
Принадлежит: SIEMENS AKTIENGESELLSCHAFT, BIBER STEPHAN, CANDIDUS YVONNE, FISCHER HUBERTUS, GREINER ROBERT, KUNDNER THOMAS, SIEMENS AG, Biber Stephan, Candidus Yvonne, Fischer Hubertus, Greiner Robert, Kundner Thomas

A material for use in a magnetic resonance system includes a carrier material and a doping material. The carrier material and the doping material are admixed in a specific proportion. A volume of the material smaller than 1 mm2 contains a substantially homogeneous intermixing of the carrier material and the doping material.

Подробнее
Номер записи: 1
26-12-2017 дата публикации

Patient-adaptive B0 homogenization of MR systems using different types of shim coils

Номер: US0009851423B2
Автор: Stephan Biber, Ralf Ladebeck, BIBER STEPHAN, LADEBECK RALF, Biber Stephan, Ladebeck Ralf
Принадлежит: Siemens Aktiengesellschaft, BIBER STEPHAN, LADEBECK RALF, SIEMENS AG, Biber Stephan, Ladebeck Ralf

The embodiments relate to methods and to magnetic resonance tomography systems having a shim system, where the shim system includes at least one global shim coil in an area surrounding the bore of the magnetic resonance tomography system, and where the shim system includes a local shim coil in a local coil of the magnetic resonance tomography system with a shim controller, where the shim controller embodied to define shim currents for the global shim coil and for the local shim coil.

Подробнее
Номер записи: 2
01-09-2016 дата публикации

LOCAL SHIM COIL WITHIN A LOCAL COIL FOR LOCAL B0 HOMOGENIZATION IN AN MRT EXAMINATION

Номер: US20160252594A1
Автор: Stephan Biber, BIBER STEPHAN, Biber Stephan
Принадлежит:

A local coil for an imaging system, in particular an MRI scanner. The local coil is an MRI scanner local coil within which the head of a patient may be positioned, and that includes at least one shim coil.

Подробнее
Номер записи: 3
05-06-2013 дата публикации

Magnetic resonance radiography device, method for balancing out a field inhomogeneity and shim coil arrangement

Номер: CN103135081A
Автор: Biber Stephan
Принадлежит:

The technical problem that the invention aims to solve is to allow an MR image of high quality to be obtained in an MRT device. Inhomogeneity introduced by tissues of a patient to a magnetic basic field of the MR device is critical. In order to balance out a field inhomogeneity, a value for a coil current is determined by a controller as a function of an item of information relating to the field inhomogeneity and an item of information relating to a position of at least one balancing or shim coil arranged in the magnetic field. The value is to be supplied to the at least one shim coil in order to generate a magnetic balancing field to balance out the field inhomogeneity. A control signal for at least one shim current source and for at least one switching matrix coupling the at least one shim current source to the at least one shim coil is generated as a function of the at least one value. The invention also relates to an MRT device with a switching matrix.

Подробнее
Номер записи: 4
14-11-2017 дата публикации

Method and magnetic resonance apparatus with a cooling system to cool a superconducting basic magnetic field coil

Номер: US0009817092B2
Автор: Stephan Biber, Thorsten Speckner, BIBER STEPHAN, SPECKNER THORSTEN, Biber Stephan, Speckner Thorsten
Принадлежит: Siemens Aktiengesellschaft, SIEMENS AG

A magnetic resonance apparatus has a magnet unit that includes at least one superconducting basic magnetic field coil, a magnet housing unit surrounding the at least one superconducting basic magnetic field coil, a cooling system that has at least one cooling loop and a heat absorption unit to cool the at least one superconducting basic magnetic coil, and an additional unit. The cooling system has a switching unit with at least one first cooling mode, and the switching unit couples the at least one cooling loop of the cooling system with the additional unit for a heat exchange in the first cooling mode.

Подробнее
Номер записи: 5
26-06-2013 дата публикации

Selection unit for magnetic resonance imaging system

Номер: CN103176154A
Автор: Biber Stephan, Bollenbeck Jan, Oppelt Ralph, Rauh Georg, Schnell Wilfried, Vester Markus
Принадлежит:

A selection unit for a magnetic resonance imaging system may be provided. The selection unit electrically connects a first number of electrical terminals to a second number of communication entities. The selection unit is arranged in and/or on a mobile object-support element for moving an examination object which is to be depicted by the magnetic resonance imaging system into a recording position.

Подробнее
Номер записи: 6
06-03-2018 дата публикации

Method and test apparatus for determining a deviation in homogeneity of a magnetic field of a magnetic resonance scanner

Номер: US0009910116B2
Автор: Stephan Biber, BIBER STEPHAN, Biber Stephan
Принадлежит: Siemens Healthcare GmbH, SIEMENS HEALTHCARE GMBH

In a method and test apparatus for determining a deviation in the homogeneity of a basic magnetic field of a magnetic resonance scanner, test vessels are positioned in a test plane that first and second positions along a direction in the scanner, and measurement data are acquired with the test vessels at said respective positions. The acquired measurement data are provided to a processor, wherein a deviation of the homogeneity of the basic magnetic field is determined based thereon.

Подробнее
Номер записи: 7
11-07-2012 дата публикации

Antenna circuit for an MRI system

Номер: CN102565732A
Автор: Biber Stephan, Nistler Juergen, Vester Markus
Принадлежит:

The present invention concerns an antenna circuit that is adapted to supply and/or read out a plurality of antenna elements (46, 48, 50) of an antenna assembly of a magnetic resonance imaging system. The antenna elements (46, 48, 50) are decoupled by phase shifter elements (28, 30, 32, 34, 36, 38) and supplied with signals by the phase shifter elements. The antenna circuit (22) may also be used to detect signals that are received by the antenna elements.

Подробнее
Номер записи: 8
04-04-2017 дата публикации

Magnetic resonance apparatus with wireless transmission from MRI receive coils to receiver

Номер: US0009612304B2
Автор: Stephan Biber, Klaus Huber, BIBER STEPHAN, HUBER KLAUS, Biber Stephan, Huber Klaus
Принадлежит: Siemens Aktiengesellschaft, BIBER STEPHAN, HUBER KLAUS, SIEMENS AG, Biber Stephan, Huber Klaus

A magnetic resonance apparatus includes receive coils and a receiver device for processing magnetic resonance signals received by coil elements of the receive coils. The receive coils are subdivided into at least a first group having at least one receive coil and a second group having at least one receive coil. The receive coils of the first group are connected to the receiver device via a hardwired communications link, and the receive coils of the second group are each connectable or connected to the receiver device via a wireless communications link.

Подробнее
Номер записи: 9
19-09-2012 дата публикации

Device for processing asymmetric signals and symmetric signals

Номер: CN102684635A
Автор: Oppelt Ralph, Biber Stephan, Rehner Robert
Принадлежит:

The invention describes a device for processing asymmetric signals and symmetric signals, wherein the device includes image frequency (f1, f2) components for balancing and filtering nominal frequency (f0) of asymmetric signals. Components for balancing and filtering in combination includes improved BF, wherein perceptual or capacitive components (Lsy, Csy) of a normalized BF are selectively replaced by a series resonant circuit or a shunt-resonant circuit such that the improved BF can be in a balance state under this circumstance of the image frequency (f1, f2) to be blanking and symmetrical output ends (Out 1, Out 2) of the BF possess prescribed impedance (Zsym) under this circumstance of the nominal frequency (f0), wherein the nominal frequency (f0) is transmitted to the symmetrical output ends (Out 1, Out 2) of the improved BF as signals balanced to the ground.

Подробнее
Номер записи: 10
20-09-2016 дата публикации

Multi-layer cushion for optimum adjustment to anatomy and for susceptibility adjustment

Номер: US0009448295B2
Автор: Stephan Biber, BIBER STEPHAN, Biber Stephan
Принадлежит: Siemens Aktiengesellschaft, BIBER STEPHAN, SIEMENS AG, Biber Stephan

A shim cushion for a magnetic resonance tomography system includes at least two layers. A first layer of the at least two layers includes both a higher deformability and also a lower susceptibility than a second layer of the at least two layers.

Подробнее
Номер записи: 11
17-07-2013 дата публикации

Mrt local coil position detection in an mrt system

Номер: CN103207375A
Автор: Biber Stephan
Принадлежит:

Magnetic resonance tomography (MRT) local coil positioning by RFID is enabled with a positioning device to detect a position (xRFID, yRFID, zRFID) of a first object (106) relative to a position (xLA, yLA, zLA) of an additional object (LA, WS, 104,101) that includes at least one RFID tag (A-Q) arranged on the first object (106) and/or at least one RFID reader arranged on the additional object (WS, 104,101).

Подробнее
Номер записи: 12
04-08-2016 дата публикации

MAGNETIC RESONANCE DEVICE

Номер: US20160223629A1
Автор: Stephan Biber, Andreas Fackelmeier, Markus Vester, BIBER STEPHAN, FACKELMEIER ANDREAS, VESTER MARKUS, Biber Stephan, Fackelmeier Andreas, Vester Markus
Принадлежит:

An MR device includes at least one body coil for generating a B1 magnetic field and at least one radiofrequency line routed through the B1 magnetic field. The at least one radiofrequency line has at least one frequency filter for blocking a voltage induced by the B1 magnetic field. At least one section of the radiofrequency line routed through the B1 magnetic field is embodied in printed circuit board technology on at least one printed circuit board, and information-carrying signals may be transmitted over the at least one radiofrequency line on a different frequency than the frequency of the voltage induced by the B1 magnetic field. 1. A magnetic resonance (MR) device comprising:a body coil operable to generate a B1 magnetic field; anda radiofrequency line routed through the B1 magnetic field and having a frequency filter, the frequency filter operable to block a voltage induced by the B1 magnetic field,wherein a section of the radiofrequency line routed through the B1 magnetic field is configured in printed circuit board technology on at least one printed circuit board, andwherein information-carrying signals are transmittable over the radiofrequency line on a different frequency than a frequency of the voltage induced by the B1 magnetic field.2. The MR device of claim 1 , wherein the radiofrequency line is connected at at least one end to a respective impedance-matching circuit.3. The MR device of claim 2 , wherein the at least one impedance-matching circuit provides a loss-reduced frequency range for at least one radiofrequency line claim 2 , via which frequency range information-carrying signals are transmittable on a plurality of signal frequencies that are frequency-shifted relative to one another.4. The MR device of claim 2 , wherein the at least one impedance-matching circuit provides a plurality of loss-reduced frequency ranges that are separated from one another in frequency for at least one radiofrequency line claim 2 , via which frequency ranges ...

Подробнее
Номер записи: 13
29-05-2013 дата публикации

Gradient-independent shim coil for a local coil of a magnetic resonance device

Номер: CN103123388A
Автор: Biber Stephan
Принадлежит:

A shim coil device (8,9) for installation and/or arrangement (1) within a local coil (6, 7) of a magnetic resonance device is provided. The shim coil device (8,9) includes at least one shim coil (11) formed by at least one conductor loop (12), and at least one compensation coil (13) formed by at least one conductor loop (14, 15, 24, 25). The at least one shim coil (11) and the at least one compensation coil (13) are arranged in a same coil plane (16). An overall arrangement of the at least one shim coil and the at least one compensation coil is symmetrical about a first central axis and a second central axis (20, 21). The first central axis and the second central axis (20, 21) are perpendicular to each other and lie in the coil plane (16). An overall induction surface is enclosed by the at least one conductor loop (14, 15) of the at least one compensation coil (13) corresponding to an overall induction surface enclosed by the at least one conductor loop (12) of the at least one shim coil ...

Подробнее
Номер записи: 14
08-06-2017 дата публикации

METHOD AND APPARATUS FOR EDDY CURRENT FIELD COMPENSATION IN MAGNETIC RESONANCE TOMOGRAPHY

Номер: US20170160357A1
Автор: Stephan Biber, Matthias Gebhardt, Andreas Krug, BIBER STEPHAN, GEBHARDT MATTHIAS, KRUG ANDREAS, Biber Stephan, Gebhardt Matthias, Krug Andreas
Принадлежит: Siemens Healthcare GmbH

In a method and an apparatus for magnetic resonance tomography, an eddy current field is compensated by taking into account its progression over time and its dependence on a sensed value, by having a sensor determine the sensed value and, on the basis of the sensed value, a current strength for a conductor in order to generate an opposing field to reduce the eddy current field is determined, and supplied to the conductor. 1. A method for reducing an eddy current field in a magnetic resonance data acquisition scanner comprising:with a sensor, obtaining a sensed value that characterizes conductivity of a conductive structure of a magnetic resonance data acquisition scanner in which an eddy current is induced during operation of said scanner, said eddy current producing an eddy current field;transmitting said sensed value to a determination processor;in said determination processor, determining a current strength of a current of a conductor in said scanner, dependent on said sensed value, that will reduce said eddy current field; andfrom said processor, causing said current with said current strength to be supplied to said conductor.2. A method as claimed in comprising sensing temperature as said sensed value.3. A method as claimed in comprising situating said sensor on said conductive structure in order to sense said sensed value.4. A method as claimed in wherein said conductive structure has a time constant of temperature therein that represents an abatement characteristic of said temperature after a change in said temperature claim 3 , and has an eddy current time constant that describes an abatement characteristic of an eddy current induced in said conductive structure claim 3 , and wherein said time constant of said temperature is larger than said eddy current time constant claim 3 , and wherein said method comprises sensing said temperature with said sensor as said sensed value.5. A method as claimed in comprising sensing said sensed value as a mean of a value ...

Подробнее
Номер записи: 15
18-08-2016 дата публикации

MAGNETIC RESONANCE DEVICE WITH A SWITCHING MATRIX UNIT AND A METHOD FOR PULSE SEQUENCE OPTIMIZATION

Номер: US20160238681A1
Автор: Stephan Biber, David Grodzki, BIBER STEPHAN, GRODZKI DAVID, Biber Stephan, Grodzki David
Принадлежит:

A magnetic resonance device includes at least one gradient amplifier and at least one gradient coil. The magnetic resonance device also includes a switching matrix unit that is embodied flexibly to connect the at least one gradient amplifier to the at least one gradient coil. A preliminary pulse sequence for the magnetic resonance device provides that in the optimized pulse sequence, a sufficient number of gradient amplifiers is available at any point for operating the gradient coils used. 1. A magnetic resonance device with at least one gradient amplifier and at least one gradient coil , each of the at least one gradient amplifier and the at least one gradient coil having at least one terminal , the magnetic resonance device comprising:a switching matrix unit configured to change at least one connection state of the at least one terminal of the at least one gradient amplifier and of the at least one terminal of the at least one gradient coil.2. The magnetic resonance device of claim 1 , wherein the number of gradient amplifiers is smaller than the number of gradient coils.3. The magnetic resonance device of claim 1 , wherein the number of gradient amplifiers is smaller than three claim 1 , the number of gradient coils is larger than three claim 1 , or a combination thereof.4. The magnetic resonance device of claim 1 , wherein the number of gradient amplifiers is one and the number of gradient coils is three.5. The magnetic resonance device of claim 1 , wherein the at least one gradient amplifier comprises more than one gradient amplifier claim 1 , andwherein at least two of the gradient amplifiers have at least one different characteristic.6. The magnetic resonance device of claim 5 , wherein the at least one different characteristic is a different maximum power claim 5 , a different maximum voltage claim 5 , a different maximum current strength claim 5 , or any combination thereof.7. The magnetic resonance device of claim 1 , wherein the at least one gradient coil ...

Подробнее
Номер записи: 16
27-07-2017 дата публикации

APPARATUS FOR VISUALLY MONITORING A MAGNETIC RESONANCE SCANNER

Номер: US20170212191A1
Автор: Stephan Biber, BIBER STEPHAN, Biber Stephan
Принадлежит: Siemens Healthcare GmbH

An apparatus for visually monitoring a magnetic resonance scanner situated in a room, which is screened by an RF screen, has a camera and a screen housing in the screened room, a data link, and a receiver outside the screened room. The camera and the receiver each have at least one interface to the data link, which exits the screened room at a room interface that has a filter. The camera and the screen housing are designed so that the screen housing reduces magnetic and/or electrical interaction of the camera with a magnetic field generated by the magnetic resonance scanner. The camera has a field of view for visual detection of at least a part of the magnetic resonance scanner and is configured to generate visual data. The data link transfers the visual data between the camera and the receiver. 1. An apparatus for visual monitoring of a magnetic resonance scanner situated in a room that is screened by a radio-frequency (RF) screen , said apparatus comprising:a camera and a screen housing that at least partially surrounds said camera, said camera and said screen housing being situated in said screened room;a receiver situated outside of said screened room;said camera and said receiver each having an interface to a data link between said camera and said receiver;a room interface via which said data link exits said screened room, said room interface comprising a filter;said camera and said screen housing being configured so that the screen housing reduces at least one of magnetic interaction and electrical interaction of the camera with a magnetic field generated by the magnetic resonance scanner;said camera having a field of view that encompasses at least a part of said magnetic resonance scanner, and said scanner generating visual data that represents said at least a part of said magnetic resonance scanner; andsaid data link being configured to transfer said visual data between said camera and said receiver.2. An apparatus as claimed in wherein said data link exits ...

Подробнее
Номер записи: 17
04-07-2017 дата публикации

Material for use in a magnetic resonance installation, method for manufacturing said material, and magnetic resonance installation

Номер: US0009697936B2
Автор: Stephan Biber, BIBER STEPHAN, Biber Stephan
Принадлежит: SIEMENS AKTIENGESELLSCHAFT, BIBER STEPHAN, SIEMENS AG, Biber Stephan

A material for a magnetic resonance installation is provided, wherein the material includes a support material and a magnetic doping material which is admixed in a specific proportion. The doping material exhibits an anisotropic susceptibility. In respect of the anisotropic susceptibility, the doping material exhibits a mean orientation along a predefined direction. An essentially homogeneous intermixture of the support material and the doping material is present within a volume of the material which is smaller than 1 mm3.

Подробнее
Номер записи: 18
19-09-2017 дата публикации

Magnetic resonance unit, a magnetic resonance apparatus with the magnetic resonance unit, and a method for determination of a movement by a patient during a magnetic resonance examination

Номер: US9766308B2
Автор: BIBER STEPHAN, Biber Stephan
Принадлежит: BIBER STEPHAN, SIEMENS HEALTHCARE GMBH, Biber Stephan

A magnetic resonance unit with a housing unit and a patient accommodation area for the accommodation and/or holding of at least one part region of a patient is provided. The patient accommodation area is surrounded at least partially by the housing unit, a first and a second movement sensor unit for acquiring a first and a second item of movement information of a movement of the patient. The first movement sensor unit exhibits a first field of view for the acquisition of a first part region of the patient and/or of the patient accommodation area, and the second movement sensor unit exhibits a second field of view for the acquisition of a second part region of the patient and/or of the patient accommodation area, which is formed differently in relation to the first part region of the patient and/or of the patient accommodation area.

Подробнее
Номер записи: 19
17-01-2017 дата публикации

Identifying the static position of transmission/reception coils of a magnetic resonance imaging scanner with the aid of electronically readable labels

Номер: US0009547055B2
Автор: Stephan Biber, Gerhard Metz, BIBER STEPHAN, METZ GERHARD, Biber Stephan, Metz Gerhard
Принадлежит: Siemens Aktiengesellschaft, BIBER STEPHAN, METZ GERHARD, SIEMENS AG, Biber Stephan, Metz Gerhard

A device for identifying a position of a local coil of a magnetic resonance imaging scanner relative to a position of a patient couch includes at least one label configured to transmit a signal with at least one identity number wirelessly, and at least one reading unit with a reading-unit antenna. The at least one reading unit is configured to receive the signal. The device also includes a position determination apparatus configured to determine the position of the local coil relative to the patient couch.

Подробнее
Номер записи: 20
27-03-2013 дата публикации

Magnetic resonance coil with overlapping coil elements, magnetic resonance device and method

Номер: CN102998641A
Автор: Biber Stephan, Driemel Daniel, Greim Helmut, Wolf Steffen
Принадлежит:

The invention relates to a magnetic resonance coil with overlapping coil elements, a magnetic resonance device and a method. The magnetic resonance coil (1), in particular a local coil, is used to emit and/or receive a magnetic resonance signal. The magnetic resonance coil (1) comprises at least two overlapping coil elements (4). Coil wires (3, 3a, 3b) of the coil elements are arranged on a support body (2) and are intersected in an intersection area (7). The overlapping coil elements (4) are disposed at different sides of the support body (2). The support body (2) is formed by at least three layers (8, 9, 10) of supporting materials. A cavity (11) filled with the air or a filling material (12) is arranged in the middle layer (9) at the intersection area (7). The dielectric constant of the filling material is lower than that of the supporting material.

Подробнее
Номер записи: 21
25-09-2013 дата публикации

Multi-layer cushion for optimum adjustment to anatomy and for susceptibility adjustment

Номер: CN103323798A
Автор: Biber Stephan
Принадлежит:

The invention relates to a multi-layer cushion for the optimum adjustment to anatomy and for the susceptibility adjustment. A shim cushion for a magnetic resonance tomography system (101) includes at least two layers (M1, M2). A first layer (M1) of the at least two layers includes both a higher deformability and also a lower susceptibility than a second layer (M2) of the at least two layers.

Подробнее
Номер записи: 22
10-04-2013 дата публикации

Recording of calibration data for magnetic resonance system

Номер: CN103033776A
Автор: Biber Stephan
Принадлежит:

A local coil 1 with a plurality of magnetic resonance antenna elements 2 and a plurality of test signal coupling units 6, 9, 10 assigned individually or in groups to the plurality of magnetic resonance antenna elements 2 is provided. In order to transmit a test signal, each test signal coupling unit of the plurality of test signal coupling units is connected via a star connection unit to a joint test signal connector and/or to a transmission cable of a transmit and/or receive chain of an assigned magnetic resonance antenna element of the plurality of magnetic resonance antenna elements. In addition, the invention also describes a magnetic resonance system 100 with the local coil 1 and a method used for acquiring the calibration data of the magnetic resonance system 100 and utilizing the magnetic resonance system 100 to generate measurement data.

Подробнее
Номер записи: 23
04-04-2017 дата публикации

Imaging device for a joint of a human

Номер: US0009610050B2
Автор: Stephan Biber, BIBER STEPHAN, Biber Stephan
Принадлежит: Siemens Aktiengesellschaft, BIBER STEPHAN, SIEMENS AG, Biber Stephan

An imaging device for a joint of a human is made of an HF transparent material. The imaging device has a base element that may be fastened to a patient bed of a magnetic resonance system. The imaging device includes a bearing element, in which a joint region of an extremity of the human may be supported when the base element is fastened to the patient bed. The bearing element and the base element are connected movably to each other by a guiding structure such that when the base element is fastened to the patient bed, the bearing element may be positioned in a plurality of defined positions relative to the base element.

Подробнее
Номер записи: 24
21-09-2017 дата публикации

MAGNETIC RESONANCE APPARATUS AND METHOD FOR THE OPERATION THEREOF

Номер: US20170269181A1
Автор: Nicholas Aley, Stephan Biber, David Grodzki, Marcel Kruip, ALEY NICHOLAS, BIBER STEPHAN, GRODZKI DAVID, KRUIP MARCEL, Aley Nicholas, Biber Stephan, Grodzki David, Kruip Marcel
Принадлежит: Siemens Healthcare GmbH

In a magnetic resonance apparatus and an operating method therefor, at least one limitation criterion, which describes the avoidance of excessive excitations in an interference spectrum in the magnetic resonance scanner of the apparatus, formed by an interference frequency or an interference frequency range, is specified by a limitation supply processor in order to check a scanning protocol, described by recording parameters, that is to be implemented. At least part of the temporal control sequence of the scanning protocol is determined as a pre-calculation sequence from the recording parameters by a simulation processor and the pre-calculation sequence is checked in a checking processor by the limitation criterion. Implementation of the scanning protocol is prevented when the limitation criterion is not fulfilled.

Подробнее
Номер записи: 25
07-03-2017 дата публикации

Combined HF/shim/gradient signal routing

Номер: US0009588197B2
Автор: Stephan Biber, Wolfgang Renz, Jan Ruff, BIBER STEPHAN, RENZ WOLFGANG, RUFF JAN, Biber Stephan, Renz Wolfgang, Ruff Jan
Принадлежит: Siemens Aktiengesellschaft, BIBER STEPHAN, RENZ WOLFGANG, RUFF JAN, SIEMENS AG, Biber Stephan, Renz Wolfgang, Ruff Jan

A method and a magnetic resonance tomography (MRT) system are provided. The MRT system includes at least one cable. The MRT system is configured to transmit high frequency (HF) signals for at least one HF transmitting coil, and shim signals for at least one shim coil and/or gradient signals for at least one gradient coil in the at least one cable.

Подробнее
Номер записи: 26
07-11-2017 дата публикации

Determination of a type of processing of signals transmitted by local coil

Номер: US0009810752B2
Автор: Stephan Biber, Jan Bollenbeck, Markus Vester, JianMin Wang, BIBER STEPHAN, BOLLENBECK JAN, VESTER MARKUS, WANG JIANMIN, Biber Stephan, Bollenbeck Jan, Vester Markus, Wang JianMin
Принадлежит: Siemens Aktiengesellschaft, BIBER STEPHAN, BOLLENBECK JAN, VESTER MARKUS, WANG JIANMIN, SIEMENS AG, Biber Stephan, Bollenbeck Jan, Vester Markus, Wang JianMin

A method and an apparatus for a magnetic resonance imaging system are provided. A type of further processing of signals transmitted by a local coil to a magnetic resonance imaging (MRI) system is determined in dependence on information received in or from the local coil about a local-coil type of the local coil.

Подробнее
Номер записи: 27
11-09-2013 дата публикации

Shoulder local coil system for a magnetic resonance tomography system

Номер: CN103293496A
Автор: Biber Stephan, Kurth Rainer, Zink Stephan
Принадлежит:

The application relates to a shoulder local coil system (10) for a magnetic resonance tomography system (550) for generating magnetic resonance images of a shoulder region of a person to be examined (19. The shoulder local coil system (10) includes a base plate (100), a fixed or removable cover plate (11) over the base plate, and a flexible local coil (110) arranged wholly or partially movably between the base plate and the cover plate. In addition, the application further relates to a high frequency reception apparatus (560) and a magnetic resonance tomography system (550) for generating magnetic resonance images which include such a shoulder local coil system (10), and relates to a method for generating magnetic resonance images of a shoulder region by using the shoulder local coil system (10), the high frequency reception apparatus (560) and the magnetic resonance tomography system (550).

Подробнее
Номер записи: 28
23-01-2013 дата публикации

Automatic control of power consumption of magnetic resonance device

Номер: CN102885623A
Автор: Biber Stephan, Heismann Bjoern, Matschl Volker, Schmidt Sebastian, Vester Markus
Принадлежит:

The invention relates to automatic control of power consumption of a magnetic resonance device. The invention describes a method used for operating a magnetic resonance device (1) comprising a plurality of components that consume power, power consumption of each component is determined, at least one standard is used to control the operation of the components, enabling a predetermined threshold of the total power consumption of the magnetic resonance device (1) not to be exceeded.

Подробнее
Номер записи: 29
30-05-2017 дата публикации

Recording of calibration data for a magnetic resonance system

Номер: US0009664766B2
Автор: Stephan Biber, BIBER STEPHAN, Biber Stephan
Принадлежит: Siemens Aktiengesellschaft, BIBER STEPHAN, SIEMENS AG, Biber Stephan

A local coil with a plurality of magnetic resonance antenna elements and a plurality of test signal coupling units assigned individually or in groups to the plurality of magnetic resonance antenna elements is provided. In order to transmit a test signal, each test signal coupling unit of the plurality of test signal coupling units is connected via a star connection unit to a joint test signal connector and/or to a transmission cable of a transmit and/or receive chain of an assigned magnetic resonance antenna element of the plurality of magnetic resonance antenna elements.

Подробнее
Номер записи: 30
27-02-2018 дата публикации

MR marker for magnetic resonance imaging

Номер: US0009903924B2
Автор: Stephan Biber, BIBER STEPHAN, Biber Stephan
Принадлежит: Siemens Aktiengesellschaft, BIBER STEPHAN, SIEMENS AG, Biber Stephan

An MR marker for magnetic resonance imaging includes: (1) a closed volume containing a marker medium, (2) a first marker coil surrounding the volume for detecting an MR signal from the marker medium, (3) an RF shield which surrounds at least the volume and the first marker coil and screens against external RF fields, (4) a second marker coil, arranged outside the RF shield, for inductive and/or capacitive coupling to a magnetic field, and/or for emitting the MR signal detected by the first marker coil, (5) a first electrical interface for controllable electrical connection of the first marker coil to the magnetic resonance imaging scanner, (6) a second electrical interface for controllable coupling of the second marker coil and first marker coil, and (7) an electrical controller with which the first interface and/or the second interface may be controlled.

Подробнее
Номер записи: 31
11-08-2016 дата публикации

METHOD FOR CONTROLLING A MAGNETIC RESONANCE APPARATUS AND CONTROLLER FOR A MAGNETIC RESONANCE APPARATUS

Номер: US20160231407A1
Автор: Stephan Biber, Swen Campagna, BIBER STEPHAN, CAMPAGNA SWEN, Biber Stephan, Campagna Swen
Принадлежит: Siemens Aktiengesellschaft

In a method and controller for controlling a magnetic resonance system, a sequence of synchronized control commands is transmitted to different system components of the magnetic resonance system. For different system components a number of control commands is supplied in a relative chronological order in relation to a defined system time, wherein the control commands in the relative chronological order are each allocated times that specify when a particular control command should be executed in relation to a defined system time. The control commands are passed in the relative chronological order to a data-converting interface, which forwards the control commands in a latency-compensating data transfer protocol via a bus system, which has a deterministic latency, to the individual system components. 1. A method for controlling a magnetic resonance system comprising:in a data supply processor of a magnetic resonance system, formulating a plurality of individual control commands for respectively operating a plurality of different system components of a magnetic resonance system, and organizing said plurality of control commands in a relative chronological order with respect to a defined system clock, and allocating, to each respective control command in said relative chronological order, an allocated time that specifies when the respective control command should be executed relative to the other control commands in said relative chronological order;transferring said control commands in said relative chronological order from said data supply processor to a data-converting interface and, from said data-converting interface forwarding the control commands to the different system components via a bus system that exhibits a known latency; andin said data-converting interface, generating a latency-compensating data transfer protocol that includes said control commands with said respective allocated times adjusted dependent on said latency of said bus system, and transmitting ...

Подробнее
Номер записи: 32
14-11-2017 дата публикации

MRI antenna coil selection unit within patient table cable duct

Номер: US0009817089B2
Автор: Stephan Biber, Jan Bollenbeck, Ralph Oppelt, Georg Rauh, Wilfried Schnell, Markus Vester, BIBER STEPHAN, BOLLENBECK JAN, OPPELT RALPH, RAUH GEORG, SCHNELL WILFRIED, VESTER MARKUS, Biber Stephan, Bollenbeck Jan, Oppelt Ralph, Rauh Georg, Schnell Wilfried, Vester Markus
Принадлежит: Siemens Aktiengesellschaft, BIBER STEPHAN, BOLLENBECK JAN, OPPELT RALPH, RAUH GEORG, SCHNELL WILFRIED, VESTER MARKUS, SIEMENS AG, Biber Stephan, Bollenbeck Jan, Oppelt Ralph, Rauh Georg, Schnell Wilfried, Vester Markus

A selection unit for a magnetic resonance imaging system may be provided. The selection unit electrically connects a first number of electrical terminals to a second number of communication entities. The selection unit is arranged in and/or on a mobile object-support element for moving an examination object which is to be depicted by the magnetic resonance imaging system into a recording position.

Подробнее
Номер записи: 33
30-10-2013 дата публикации

Shim coil arrangement for extremity of patient

Номер: CN103376430A
Автор: Biber Stephan
Принадлежит:

A shim coil arrangement for at least one extremity of a patient such as a forearm and/or a hand for use in a magnetic resonance device is provided. The shim coil arrangement is arranged surrounding a receptacle for the at least one extremity. At least two planar shim coils having a common coil plane that lies at right angles to a direction of a basic magnetic field of the magnetic resonance device in a usage state and/or to a longitudinal direction of the receptacle are arranged around a circumference of the receptacle. A plurality of coil planes succeeding one another in the direction of the basic magnetic field of the magnetic resonance device in the usage state and/or the longitudinal direction of the receptacle and at right angles to the direction of the basic magnetic field and/or the longitudinal direction are provided with at least two planar shim coils.

Подробнее
Номер записи: 34
06-03-2013 дата публикации

Local coil arrangement for magnetic resonance system, has return line that is arranged away from marginal area and conductor

Номер: CN102955140A
Автор: Biber Stephan
Принадлежит:

The coil arrangement has a mechanical support structure (10) that is introduced into homogeneous region of magnetic field (B0) in magnetic resonance system. The support structure is provided with a conductor (16) that is annularly surrounded by field lines (17,22) in a marginal area (18) of detection range (13). A return line (20) is arranged away from marginal area and conductor. The current magnetic field angle formed with respect to field line (22) is larger than magnetic field compensation angle formed with respect to field line (17).

Подробнее
Номер записи: 35
17-01-2017 дата публикации

Receiving coil and local coil for magnetic resonance applications with adjustable lugs

Номер: US0009547054B2
Автор: Stephan Biber, Daniel Driemel, Stephan Zink, BIBER STEPHAN, DRIEMEL DANIEL, ZINK STEPHAN, Biber Stephan, Driemel Daniel, Zink Stephan
Принадлежит: Siemens Aktiengesellschaft, BIBER STEPHAN, DRIEMEL DANIEL, ZINK STEPHAN, SIEMENS AG, Biber Stephan, Driemel Daniel, Zink Stephan

A local coil for magnetic resonance applications includes a rigid housing that radially surrounds a substantially cylindrical examination volume. Arranged in the rigid housing is a transmitting coil, by which an excitation signal may be applied to the examination volume. An object to be examined arranged in the examination volume may be excited by the excitation signal for emitting a magnetic resonance signal. The local coil includes a size-variable structure, in which an antenna assembly for receiving the magnetic resonance signal emitted by the object to be examined is arranged. The size-variable structure is arranged in the examination volume and is connected to the rigid housing. The size-variable structure is soft and flexible.

Подробнее
Номер записи: 36
11-09-2013 дата публикации

Local screen and method for the screening out of magnetic resonance signals

Номер: CN103293497A
Автор: Biber Stephan, Rothard Joerg
Принадлежит:

The invention describes a local screen and a method for the screening out of magnetic resonance signals. The local screen screens out magnetic resonance signals of an object under examination during magnetic resonance imaging with a magnetic resonance device. The local screen includes a plurality of electrically conductive local screen elements that are arranged such that no direct electrically conductive connection pertains between the local screen elements. The local screen further includes a carrier device for accommodating the local screen elements and a number of switching devices that are connected in an electrically conductive manner to the local screen element, and are embodied such that the electrical resistance may be controlled by a number of screen control signals. In addition, the local screen includes a number of screen control signal inputs for the number of screen control signals. The invention further describes a local screen system which screens magnetic resonance signals ...

Подробнее
Номер записи: 37
06-12-2016 дата публикации

Magnetic resonance coil with overlapping coil elements

Номер: US0009513351B2
Автор: Stephan Biber, Daniel Driemel, Helmut Greim, Steffen Wolf, BIBER STEPHAN, DRIEMEL DANIEL, GREIM HELMUT, WOLF STEFFEN, Biber Stephan, Driemel Daniel, Greim Helmut, Wolf Steffen
Принадлежит: Siemens Aktiengesellschaft, BIBER STEPHAN, DRIEMEL DANIEL, GREIM HELMUT, WOLF STEFFEN, SIEMENS AG, Biber Stephan, Driemel Daniel, Greim Helmut, Wolf Steffen

A magnetic resonance coil for transmitting and/or receiving magnetic resonance signals is provided. The magnetic resonance coil includes at least two overlapping coil elements. Coil conductors of the at least two overlapping coil elements intersect in intersection regions and are arranged on a support. Mutually overlapping coil elements of the at least two overlapping coil elements are arranged on different sides of the support. The support is formed from at least three layers of a support material. A cavity that is filled with air or a filler material, the dielectric constant of the filler material being lower than the dielectric constant of the support material, is provided in the intersection regions in a middle layer of the at least three layers.

Подробнее
Номер записи: 38
27-02-2018 дата публикации

Identifying transmission/reception coils of a magnetic resonance imaging scanner with the aid of electronically readable labels

Номер: US0009903897B2
Автор: Stephan Biber, Gerhard Metz, BIBER STEPHAN, METZ GERHARD, Biber Stephan, Metz Gerhard
Принадлежит: Siemens Aktiengesellschaft, BIBER STEPHAN, METZ GERHARD, SIEMENS AG, Biber Stephan, Metz Gerhard

A device for identifying a local coil property of a local coil for a magnetic resonance imaging scanner includes at least one label configured to transmit at least one identity number wirelessly. The device also includes at least one reading unit with a reading-unit antenna. The reading unit is configured to receive the at least one identity number. The device includes an identification apparatus configured to identify a local coil property of the local coil based on the at least one received identity number.

Подробнее
Номер записи: 39
06-02-2013 дата публикации

Local coil with multiple shim coils capable of being individually turned off

Номер: CN102914751A
Автор: Biber Stephan
Принадлежит:

The present invention relates to a method and a local coil (106) used for an imaging system (101), especially an MRT (101) local coil. The present invention is characterized in that: the local coil (106) is provided with a plurality of shim coils (LS1, LS2), wherein a current (I1) in (LS1) of the shim coils generates a shim (BS1) by connecting (ST) and disconnecting (ST), a current (I2) in another (LS2) of the shim coils generates a shim (BS2) by connecting (ST) and disconnecting (ST), and the current (I1, I2) in the shim coils (LS1, LS2) respectively generate shims (BS1, BS2) by independently connecting (ST) and disconnecting (ST).

Подробнее
Номер записи: 40
27-06-2017 дата публикации

Local coil system, transmitting device, magnetic resonance system and method for the wireless transfer of energy to a local coil system

Номер: US0009689940B2
Автор: Stephan Biber, Jürgen Nistler, Markus Vester, BIBER STEPHAN, NISTLER JÜRGEN, VESTER MARKUS, Biber Stephan, Nistler Jürgen, Vester Markus
Принадлежит: Siemens Aktiengesellschaft, BIBER STEPHAN, NISTLER JÜRGEN, VESTER MARKUS, SIEMENS AG, Biber Stephan, Nistler Jürgen, Vester Markus

A local coil system for a magnetic resonance system including at least one local coil for capturing magnetic resonance (MR) signals and at least one energy receiving antenna for inductively receiving energy for the local coil system from a temporally varying magnetic field is provided. The at least one energy receiving antenna is or may be tuned to an energy transfer frequency that is lower than a Larmor frequency of the MR signals to be captured and higher than approximately 20 kHz.

Подробнее
Номер записи: 41
10-04-2013 дата публикации

Method for the control of a magnetic resonance system

Номер: CN103027679A
Автор: Biber Stephan, Greim Helmut, Nistler Juergen, Speckner Thorsten
Принадлежит:

A method for the control of a magnetic resonance system is provided. In a test phase before a magnetic resonance measurement, a test high-frequency pulse with several parallel individual high-frequency pulses is transmitted with a transmitter antenna arrangement over various different high-frequency transmitter channels. At lower transmitter power, the test high-frequency pulse generates essentially the same field distribution as an excitation high-frequency pulse to be transmitted during a subsequent magnetic resonance measurement. A high-frequency field generated by this test high-frequency pulse is measured in at least one area of a local pulse arrangement, and on the basis of the high-frequency field measured, a high-frequency field value that is to be anticipated at the local coil arrangement during the subsequent magnetic resonance measurement is determined. The control of the magnetic resonance system during a later magnetic resonance measurement includes taking the high-frequency ...

Подробнее
Номер записи: 42
10-01-2017 дата публикации

Balancing out a field inhomogeneity in a magnetic resonance tomography system and shim coil arrangement

Номер: US0009541619B2
Автор: Stephan Biber, BIBER STEPHAN, Biber Stephan
Принадлежит: Siemens Aktiengesellschaft, BIBER STEPHAN, SIEMENS AG, Biber Stephan

In order to balance out a field inhomogeneity, a value for a coil current is determined by a controller as a function of an item of information relating to the field inhomogeneity and an item of information relating to a position of at least one balancing or shim coil arranged in the magnetic field. The value is to be supplied to the at least one shim coil in order to generate a magnetic balancing field to balance out the field inhomogeneity. A control signal for at least one shim current source and for at least one switching matrix coupling the at least one shim current source to the at least one shim coil is generated as a function of the at least one value.

Подробнее
Номер записи: 43
17-01-2017 дата публикации

Method for the control of a magnetic resonance system

Номер: US0009547064B2
Автор: Stephan Biber, Helmut Greim, Juergen Nistler, Thorsten Speckner, BIBER STEPHAN, GREIM HELMUT, NISTLER JUERGEN, SPECKNER THORSTEN, Biber Stephan, Greim Helmut, Nistler Juergen, Speckner Thorsten
Принадлежит: Siemens Aktiengesellschaft, BIBER STEPHAN, GREIM HELMUT, NISTLER JUERGEN, SPECKNER THORSTEN, SIEMENS AG, Biber Stephan, Greim Helmut, Nistler Juergen, Speckner Thorsten

A method for the control of a magnetic resonance system is provided. In a test phase before a magnetic resonance measurement, a test high-frequency pulse with several parallel individual high-frequency pulses is transmitted with a transmitter antenna arrangement over various different high-frequency transmitter channels. At lower transmitter power, the test high-frequency pulse generates essentially the same field distribution as an excitation high-frequency pulse to be transmitted during a subsequent magnetic resonance measurement. A high-frequency field generated by this test high-frequency pulse is measured in at least one area of a local pulse arrangement, and on the basis of the high-frequency field measured, a high-frequency field value that is to be anticipated at the local coil arrangement during the subsequent magnetic resonance measurement is determined. The control of the magnetic resonance system during a later magnetic resonance measurement includes taking the high-frequency ...

Подробнее
Номер записи: 44
08-08-2017 дата публикации

Identifying a position of transmission/reception coils of a magnetic resonance imaging scanner with labels read in motion

Номер: US0009726470B2
Автор: Stephan Biber, Gerhard Metz, BIBER STEPHAN, METZ GERHARD, Biber Stephan, Metz Gerhard
Принадлежит: Siemens Aktiengesellschaft, BIBER STEPHAN, METZ GERHARD, SIEMENS AG, Biber Stephan, Metz Gerhard

A method and a device for identifying a position of a local coil of a magnetic resonance imaging scanner relative to a position of a patient couch are provided. The device includes at least one reading unit that is configured to determine a position of at least one label at the local coil relative to the at least one reading unit. The device also includes a position determination apparatus that is configured to determine the position of the patient couch relative to the magnetic resonance imaging scanner. The device includes a position determination apparatus that is configured to determine the position of the local coil relative to the patient couch based on the determined position of the at least one label and the determined position of the patient couch.

Подробнее
Номер записи: 45
28-09-2017 дата публикации

METHOD AND TEST APPARATUS FOR DETERMINING A DEVIATION IN HOMOGENEITY OF A MAGNETIC FIELD OF A MAGNETIC RESONANCE SCANNER

Номер: US20170276746A1
Автор: Stephan Biber, BIBER STEPHAN, Biber Stephan
Принадлежит: Siemens Healthcare GmbH

In a method and test apparatus for determining a deviation in the homogeneity of a basic magnetic field of a magnetic resonance scanner, test vessels are positioned in a test plane that first and second positions along a direction in the scanner, and measurement data are acquired with the test vessels at said respective positions. The acquired measurement data are provided to a processor, wherein a deviation of the homogeneity of the basic magnetic field is determined based thereon.

Подробнее
Номер записи: 46
25-09-2013 дата публикации

Material for use in a magnetic resonance system, method for producing the material and magnetic resonance system

Номер: CN103315738A
Автор: Biber Stephan, Candidus Yvonne, Fischer Hubertus, Greiner Robert, Kundner Thomas
Принадлежит:

A material (1) for use in a magnetic resonance system includes a carrier material (2) and a doping material (3). The carrier material (2) and the doping material (3) are admixed in a specific proportion. A volume (10) of the material (1) smaller than 1 mm3 contains a substantially homogeneous intermixing of the carrier material (2) and the doping material (3).

Подробнее
Номер записи: 47
04-07-2012 дата публикации

Local coil for magnetic resonance device and magnetic resonance device thereof

Номер: CN102540118A
Автор: Biber Stephan
Принадлежит:

The present invention relates to a local coil (6) for a magnetic resonance device (1), wherein, the local coil comprises the following components: double-resonance conductor loop devices (14,24) which are provided with at least one conductor loops (15,16,17,27,28,32,33,45); a converter device (21) which is used for converting operation energy that is received on a first resonance frequency to operation voltage; and an electronic circuit device (23) which is used for processing a magnetic resonance signal that is received on a second resonance frequency and utilizes the hoperation voltage for operating.

Подробнее
Номер записи: 48
22-03-2012 дата публикации

METHOD FOR TRANSMITTING MAGNETIC RESONANCE SIGNALS WITH DOUBLE FREQUENCY CONVERSION

Номер: US20120071117A1
Автор: Biber Stephan, Bollenbeck Jan, Oppelt Ralph, Vester Markus
Принадлежит:

Front bandpass filters that are essentially transmissive only between a minimum frequency and a maximum frequency filter the magnetic resonance signals. Front frequency mixers mix output signals of each of the bandpass filters with a front LO frequency that is standard for all the magnetic resonance signals. Rear bandpass filters that are essentially transmissive only around a front intermediate frequency filter the output signals of the front frequency mixers. Rear frequency mixers mix output signals of each of the rear bandpass filters with a respective constant rear LO frequency. Frequency filters that are transmissive for frequencies in the range of the difference of the rear LO frequency that is supplied to the rear frequency mixer arranged upstream thereof and the front intermediate frequency filter the output signals of the rear frequency mixers. Output signals of the frequency filters are combined into a common signal, which is transmitted onward. 1. A method for transmitting at least two magnetic resonance signals that are each detected by a respective local coil , the method comprising:filtering each of the at least two magnetic resonance signals in a front bandpass filter, the at least two magnetic resonance signals having frequencies substantially equal to a Larmor frequency, the front bandpass filters being essentially transmissive only between a minimum frequency and a maximum frequency;mixing, in a respective front frequency mixer, output signals of the front bandpass filters with a respective front local oscillator (LO) frequency that is standard for the at least two magnetic resonance signals, the front LO frequency being set such that a difference between the front LO frequency and the Larmor frequency is approximately equal to a predetermined front intermediate frequency that is greater than the maximum frequency;filtering output signals of the front frequency mixers in a respective rear bandpass filter, the rear bandpass filters being essentially ...

Подробнее
Номер записи: 49
26-04-2012 дата публикации

ANTENNA CIRCUIT FOR AN MRI SYSTEM

Номер: US20120098540A1
Автор: Biber Stephan, Nistler Jürgen, Vester Markus
Принадлежит:

The present embodiments include an antenna circuit that is adapted to supply and/or read out a plurality of antenna elements of an antenna assembly of a magnetic resonance imaging system. The antenna elements are decoupled by phase shifter elements and supplied with signals by the phase shifter elements. The antenna circuit may also be used to detect signals that are received by the antenna elements. 1. An antenna circuit that is adapted to supply , read out , or supply and read out a plurality of antenna elements of an antenna assembly of a magnetic resonance imaging system , the antenna circuit comprising:a first circuit connector that is adapted to be connected to a receiving, transmitting, or receiving and transmitting circuit;a first antenna-side connector that is adapted to be connected to a first antenna element of the antenna assembly, and a second antenna-side connector that is adapted to be connected to a second antenna element of the antenna assembly; anda first phase shifter element and a second phase shifter element that each cause a phase shift of a signal of 90° or 270° and each have a predetermined admittance,wherein a first connector of the first phase shifter element and a first connector of the second phase shifter element are connected to the first circuit connector, andwherein a second connector of the first phase shifter element is connected to the first antenna-side connector, and a second connector of the second phase shifter element is connected to the second antenna-side connector.2. An antenna circuit that is adapted to supply , read out , or supply and read out a plurality of antenna elements of an antenna assembly of a magnetic resonance imaging system , the antenna circuit comprising:a first circuit connector that is adapted to be connected to a first receiving, transmitting, or receiving and transmitting circuit, and a second circuit connector that is adapted to be connected to a second receiving, transmitting, or receiving and ...

Подробнее
Номер записи: 50
28-06-2012 дата публикации

D-SHAPED COIL

Номер: US20120161772A1
Автор: Biber Stephan, Vester Markus
Принадлежит:

The present embodiments relates to a magnetic resonance tomography system having a coil system. The coil system includes an upper part having at least one antenna and a lower part having at least one antenna. The upper part of the coil arrangement is disposed above a bore for receiving an examination subject. The lower part of the coil arrangement is disposed below a field of view of the magnetic resonance tomography system. The lower part of the coil arrangement is closer to the examination subject than the upper part of the coil arrangement. 1. A magnetic resonance tomography (MRT) system comprising:a bore for receiving an examination subject; and an upper part having a first antenna; and', 'a lower part having a second antenna,, 'a coil system comprisingwherein the upper part of the coil system is disposed above the bore,wherein the lower part of the coil system is disposed below a field of view of the MRT system, andwherein the lower part of the coil system is closer to the examination subject than the upper part of the coil system.2. The MRT system as claimed in claim 1 , further comprising a whole-body coil integrated into the MRT system.3. The MRT system as claimed in claim 1 , wherein the upper part is an anterior part in relation to a patient positioned in a supine position on a patient couch claim 1 , andwherein the lower part is a posterior part in relation to the patient positioned in the supine position on the patient couch.4. The MRT system as claimed in claim 1 , further comprising a housing wall having a housing wall section claim 1 , the housing wall section being located below a field of view of the MRT system claim 1 ,wherein the lower part of the coil system is disposed at the housing wall section.5. The MRT system as claimed in claim 1 , further comprising a patient couch for the examination subject claim 1 ,wherein the lower part is integrated in the patient couch or suitable for use in the patient couch.6. The MRT system as claimed in claim 1 ...

Подробнее
Номер записи: 51
19-07-2012 дата публикации

ANTENNA ARRANGEMENT FOR MAGNETIC RESONANCE APPLICATIONS

Номер: US20120182013A1
Автор: Biber Stephan, Nistler Jürgen, Vester Markus
Принадлежит:

An antenna arrangement for magnetic resonance applications includes antenna elements substantially parallel to a common central axis, distributed around the central axis at a distance from the central axis, and enclosing an essentially cylindrical volume. The antenna arrangement includes intermediate connections that connect to immediately adjacent antenna elements at connection points that lie between the ends of the antenna elements. A preamplifier connects to each of the intermediate connections and has an output that, in a receive mode, corresponds to a respective feed-out point. In send mode, the antenna arrangement injects radio-frequency signals into the antenna elements using the injection points. The antenna arrangement is also configured to adjust the intermediate connections to a higher resistance when the antenna arrangement is in the send mode and at least some of the intermediate connections to a lower resistance when the antenna arrangement is in the receive mode. 1. An antenna arrangement for magnetic resonance applications , the antenna arrangement comprising:a plurality of antenna elements that are coupled at ends of the antenna elements via end rings, substantially parallel to a common central axis and distributed around the central axis at a distance from the central axis, such that the antenna elements enclose an essentially cylindrical volume;a plurality of injection points;intermediate connections that connect immediately adjacent antenna elements at connection points that lie between the ends of the antenna elements; anda preamplifier connected to each of the intermediate connections and having an output that, when the antenna arrangement is in a receive mode, corresponds to a respective feed-out point configured to output a received magnetic resonance signal,wherein, in a send mode, the antenna arrangement is configured to inject radio-frequency send signals into the antenna elements using the plurality of injection points, such that ...

Подробнее
Номер записи: 52
26-07-2012 дата публикации

MAGNETIC RESONANCE APPARATUS

Номер: US20120187949A1
Автор: Biber Stephan, Eiermann Franz
Принадлежит:

A magnetic resonance apparatus includes a receiving system with at least one receiver configured to process at least one receive signal of a receive channel. The magnetic resonance apparatus further includes at least one switching device configured to variably assign a first number of receive channels to a first number of inputs of the at least one receiver. The switching device has a crossbar switch and a pre-selection circuit connected upstream of the crossbar switch. Each receive channel of a first group of receive channels is directly connected to an input of a first group of inputs that is permanently assigned to the respective receive channel. 1. A magnetic resonance apparatus comprising:a receiving system having at least one receiver configured to process at least one receive signal of a receive channel; andat least one switching device configured to variably assign a first number of receive channels to a first number of inputs of the at least one receiver, the at least one switching device having a crossbar switch and a pre-selection circuit connected upstream of the crossbar switch,wherein each receive channel of a first group of receive channels is directly connected to an input of a first group of inputs that is permanently assigned to the respective receive channel.2. The magnetic resonance apparatus as claimed in claim 1 , further comprising a patient couch having plug-in locations for a local coil and predetermined pins for at least one plug-in location claim 1 , wherein the predetermined pins for the at least one plug-in location are configured to be assigned to receive channels of the first group of receive channels.3. The magnetic resonance apparatus as claimed in claim 1 , further comprising a patient couch having plug-in locations for a local coil and predetermined pins for all of the plug-in locations claim 1 , wherein the predetermined pins for all of the plug-in locations are configured to be assigned to receive channels of the first group of ...

Подробнее
Номер записи: 53
26-07-2012 дата публикации

PRINTED CIRCUIT BOARD WITH INTEGRATED SHIELDING

Номер: US20120187950A1
Автор: Biber Stephan, Hahn Heinz, Hemmerlein Martin, Rothard Jörg
Принадлежит:

A printed circuit board (PCB) is flat, providing a top side and a bottom side. A plurality of terminations is disposed on the top side in proximity to one end face of the PCB. Each termination has at least one contact that is connected to a respective conductor track of the PCB. The respective conductor track is connected to a respective local coil or to a contact disposed on the top side or the bottom side of a respective further termination. The local coil and/or at least one of the further terminations are disposed in proximity to the other end face. A basic shield impervious to frequencies in a magnetic resonance range is disposed on the top side and/or the bottom side, and an auxiliary shield electrically connected to the basic shield and impervious to frequencies in the magnetic resonance range is disposed on narrow sides of the PCB. 1. A printed circuit board comprising:a top;a bottom, sides extending from the top to the bottom on first lateral edges and end faces extending from the top to the bottom on second lateral edges, the top and the bottom being delimited by the first lateral edges and the second lateral edges;at least one intermediate layer disposed between the top and the bottom;a basic shield disposed on the top, the bottom, or the top and the bottom, the basic shield being impervious to frequencies in a magnetic resonance range;an auxiliary shield that is electrically connected to the basic shield and disposed on the sides, the auxiliary shield being impervious to frequencies in the magnetic resonance range; anda first plurality of terminations configured for first shielded cables, the first plurality of terminations being disposed on the top in proximity to one of the end faces;a second plurality of terminations configured for second shielded cables; anda plurality of conductor tracks,wherein the printed circuit board is flat,wherein each termination of the first plurality of terminations has at least one contact that is connected to a respective ...

Подробнее
Номер записи: 54
04-10-2012 дата публикации

LOCAL COIL

Номер: US20120249142A1
Автор: Biber Stephan, Candidus Yvonne, Driemel Daniel
Принадлежит:

A local coil for a magnetic resonance tomography system includes a housing with a recess for an object under examination. The local coil also includes a radio-frequency receive antenna system and one or more shim elements for homogenization of a static basic magnetic field of the magnetic resonance tomography system. 1. A local coil for a magnetic resonance tomography system , the local coil comprising:a housing comprising a recess for an object to be examined;a radio-frequency receive antenna system; andone or more shim elements for homogenization of a static basic magnetic field of the magnetic resonance tomography system.2. The local coil as claimed in claim 1 , wherein at least one of the one or more shim elements are arranged in the housing.3. The local coil as claimed in claim 1 , wherein the one or more shim elements are arranged at a distance of 3 to 80 mm from the object to be examined to be accommodated in the recess of the housing.4. The local coil as claimed in claim 1 , wherein at least one of the one or more shim elements are constructed from materials with a magnetic susceptibility χranging from −5×10to −15×10in SI units.5. The local coil as claimed in claim 4 , wherein the materials include a water-retaining gel claim 4 , a foam claim 4 , or plastic containing a diamagnetic material.6. The local coil as claimed in claim 5 , wherein the diamagnetic material is graphite claim 5 , graphene or carbon nanotubes.7. The local coil as claimed in claim 1 , wherein the coil housing is configured claim 1 , at least in some areas claim 1 , as a shim element of the one or more shim elements.8. The local coil as claimed in claim 1 , wherein the recess is adapted at least to a part of a part of the body of the object to be examined.9. The local coil as claimed in claim 8 , wherein the local coil is a head coil claim 8 , in which the recess is adapted to the head claim 8 , nape claim 8 , or head and nape of the neck area claim 8 , andwherein at least one shim ...

Подробнее
Номер записи: 55
29-11-2012 дата публикации

LOCAL COIL FOR A MAGNETIC RESONANCE DEVICE

Номер: US20120299593A1
Автор: Biber Stephan
Принадлежит:

A local coil for a magnetic resonance device includes a double resonance conductor loop arrangement having at least one conductor loop, and a converter apparatus configured for converting operating energy received at a first resonance frequency into an operating voltage. The local coil also includes an electronics arrangement operated with the operating voltage for processing magnetic resonance signals received at a second resonance frequency. 1. A local coil for a magnetic resonance , the local coil comprising:a double resonance conductor loop arrangement comprising at least one conductor loop,a converter apparatus configured for converting operating energy received at a first resonance frequency into an operating voltage; andan electronics arrangement operated with the operating voltage, the electronics arrangement configured for processing magnetic resonance signals received at a second resonance frequency.2. The local coil as claimed in claim 1 , further comprising a transmit device configured to wirelessly transmit the magnetic resonance signals received at the second resonance frequency.3. The local coil as claimed in claim 1 , wherein the at least one conductor loop includes at least one shorting capacitor claim 1 , connected in parallel to which so as to generate a double resonance are an additional capacitor and a frequency-dependent additional impedance that has a barrier effect in the case of one of the first resonance frequency and the second resonance frequency.4. The local coil as claimed in claim 1 , wherein the double resonance conductor loop arrangement comprises at least two conductor loops that overlap one another in an overlap area claim 1 , andwherein, in the overlap area, adjacent coil conductors of two adjacent conductor loops of the at least two conductor loops are connected to a connection impedance that features a barrier effect in the case of the second resonance frequency and a connection capacitor using a filter connection such that a ...

Подробнее
Номер записи: 56
13-12-2012 дата публикации

LOCAL COIL SYSTEM, TRANSMITTING DEVICE, MAGNETIC RESONANCE SYSTEM AND METHOD FOR THE WIRELESS TRANSFER OF ENERGY TO A LOCAL COIL SYSTEM

Номер: US20120313645A1
Автор: Biber Stephan, Nistler Jürgen, Vester Markus
Принадлежит:

A local coil system for a magnetic resonance system including at least one local coil for capturing magnetic resonance (MR) signals and at least one energy receiving antenna for inductively receiving energy for the local coil system from a temporally varying magnetic field is provided. The at least one energy receiving antenna is or may be tuned to an energy transfer frequency that is lower than a Larmor frequency of the MR signals to be captured and higher than approximately 20 kHz. 1. A local coil system for a magnetic resonance system for capturing magnetic resonance (MR) signals , the local coil system comprising:an energy receiving antenna for inductively receiving energy for the local coil system from a temporally varying magnetic field,wherein the energy receiving antenna is tuned or tunable to an energy transfer frequency that is lower than a Larmor frequency of the MR signals to be captured and higher than approximately 20 kHz.2. The local coil system as claimed in claim 1 , wherein the energy transfer frequency is selected such that the energy transfer frequency has no harmonic waves in the range of the Larmor frequency claim 1 , the energy transfer frequency is higher than approximately 1 MHz claim 1 , or a combination thereof.3. The local coil system as claimed in claim 1 , wherein the energy receiving antenna is configured to receive a transverse and circularly polarized magnetic field.4. The local coil system as claimed in claim 1 , wherein the energy receiving antenna is configured to receive a longitudinal and linearly polarized magnetic field that runs in a field direction of a basic magnetic field of the magnetic resonance system.5. The local coil system as claimed in claim 1 , wherein the energy receiving antenna is arranged above at least one local coil of the local coil system.6. The local coil system as claimed in claim 1 , wherein the energy receiving antenna has a larger contour than at least one local coil of the local coil system claim 1 , ...

Подробнее
Номер записи: 57
14-03-2013 дата публикации

ARRANGEMENT FOR PROCESSING A NON-SYMMETRICAL AND A SYMMETRICAL SIGNAL

Номер: US20130063221A1
Автор: Biber Stephan, Oppelt Ralph, Rehner Robert
Принадлежит:

An arrangement for processing a non-symmetrical signal includes an apparatus configured to balance and filter an image frequency of a nominal frequency of the non-symmetrical receiving signal. The apparatus includes a modified Boucherot bridge having a series or parallel oscillating circuit that replaces inductive or capacitive components of a conventional Boucherot bridge, such that the modified Boucherot bridge is in the harmonized state with the image frequency to be faded out and has a predetermined impedance with the nominal frequency on its symmetrical output terminals. The nominal frequency has a predetermined impedance on its symmetrical output terminals. The nominal frequency is transmitted as a signal balanced to ground to the symmetrical output terminals of the modified Boucherot bridge. 1. An arrangement for processing a non-symmetrical signal comprising: 'a modified Boucherot bridge having a series or parallel oscillating circuit instead of inductive or capacitive components found in a conventional Boucherot bridge, such that the modified Boucherot bridge is in a harmonized state for the image frequency to be faded out and has a predetermined impedance with a nominal frequency on symmetrical output terminals,', 'an apparatus operable to balance and filter an image frequency of a nominal frequency of the non-symmetrical signal, the apparatus comprisingwherein the arrangement is operable to transmit the nominal frequency as a signal balanced to ground to the symmetrical output terminals of the modified Boucherot bridge.2. The arrangement as claimed in claim 1 , wherein:the modified Boucherot bridge includes a first and a second signal path,the first signal path includes a series circuit that has an inductive component and a capacitive component between a terminal of a first port and a reference potential terminal,the node point between the inductive component and the capacitive component in the first signal path forms a first terminal of a second port,the ...

Подробнее
Номер записи: 58
28-03-2013 дата публикации

RECORDING OF CALIBRATION DATA FOR A MAGNETIC RESONANCE SYSTEM

Номер: US20130076353A1
Автор: Biber Stephan
Принадлежит:

A local coil with a plurality of magnetic resonance antenna elements and a plurality of test signal coupling units assigned individually or in groups to the plurality of magnetic resonance antenna elements is provided. In order to transmit a test signal, each test signal coupling unit of the plurality of test signal coupling units is connected via a star connection unit to a joint test signal connector and/or to a transmission cable of a transmit and/or receive chain of an assigned magnetic resonance antenna element of the plurality of magnetic resonance antenna elements. 1. A local coil comprising:a plurality of magnetic resonance antenna elements; anda plurality of test signal coupling units assigned individually or in groups to the plurality of magnetic resonance antenna elements,wherein each test signal coupling unit of the plurality of test signal coupling units is for transmitting a test signal and is connected via a star connection unit to a joint test signal connector, a transmission cable of a transmit chain, a receive chain, or a transmit and receive chain of an assigned magnetic resonance antenna element of the plurality of magnetic resonance, or the joint test signal connector and the transmission cable.2. The local coil as claimed in claim 1 , wherein each test signal coupling unit of at least a part of the plurality of test signal coupling units comprises a test antenna that is inductively coupled with the assigned magnetic resonance antenna element.3. The local coil as claimed in claim 2 , wherein the plurality of magnetic resonance antenna elements overlap respective test antennas assigned to the plurality of magnetic resonance antenna elements.4. The local coil as claimed in claim 3 , wherein a test antenna that is assigned to a group of magnetic resonance antenna elements of the plurality of magnetic resonance antenna elements is arranged in a joint overlapping area of the magnetic resonance antenna elements of the group.5. The local coil as ...

Подробнее
Номер записи: 59
04-04-2013 дата публикации

Method for the Control of a Magnetic Resonance System

Номер: US20130082707A1
Автор: Biber Stephan, Greim Helmut, Nistler Juergen, Speckner Thorsten
Принадлежит:

A method for the control of a magnetic resonance system is provided. In a test phase before a magnetic resonance measurement, a test high-frequency pulse with several parallel individual high-frequency pulses is transmitted with a transmitter antenna arrangement over various different high-frequency transmitter channels. At lower transmitter power, the test high-frequency pulse generates essentially the same field distribution as an excitation high-frequency pulse to be transmitted during a subsequent magnetic resonance measurement. A high-frequency field generated by this test high-frequency pulse is measured in at least one area of a local pulse arrangement, and on the basis of the high-frequency field measured, a high-frequency field value that is to be anticipated at the local coil arrangement during the subsequent magnetic resonance measurement is determined. The control of the magnetic resonance system during a later magnetic resonance measurement includes taking the high-frequency field value into account. 1. A method for the control of a magnetic resonance system , the magnetic resonance system comprising a transmitter antenna arrangement having a plurality of independent high-frequency transmitter channels , and a local coil arrangement arranged in the magnetic resonance system , the method comprising:transmitting, with the transmitter antenna arrangement, a test high-frequency pulse with a plurality of parallel individual high-frequency pulses before a magnetic resonance measurement in a test phase, over the plurality of independent high-frequency transmitter channels, the test high-frequency pulse, with lower transmitter power, generating essentially the same field distribution as an excitation high-frequency pulse to be transmitted during a subsequent magnetic resonance measurement;measuring a high-frequency field created by the test high-frequency pulse in at least one area of the local coil arrangement;determining a high-frequency field value that is ...

Подробнее
Номер записи: 60
25-04-2013 дата публикации

IMAGING DEVICE FOR A JOINT OF A HUMAN

Номер: US20130097780A1
Автор: Biber Stephan
Принадлежит:

An imaging device for a joint of a human is made of an HF transparent material. The imaging device has a base element that may be fastened to a patient bed of a magnetic resonance system. The imaging device includes a bearing element, in which a joint region of an extremity of the human may be supported when the base element is fastened to the patient bed. The bearing element and the base element are connected movably to each other by a guiding structure such that when the base element is fastened to the patient bed, the bearing element may be positioned in a plurality of defined positions relative to the base element. 1. An imaging device for a joint of a human , the imaging device comprising:a base element that is fastenable to a patient bed of a magnetic resonance system; anda bearing element, in which a joint region of an extremity of the human is supportable when the base element is fastened to the patient bed,wherein the bearing element and the base element are connected movably to each other by a guiding structure such that when the base element is fastened to the patient bed, the bearing element is positionable in a plurality of defined positions relative to the base element, andwherein the base element and the bearing elements are made of an HF transparent material.2. The imaging device as claimed in claim 1 , wherein the guiding structure is configured as a guiding structure restricting five degrees of freedom so that a single degree of freedom remains for a movement of the bearing element relative to the base element.3. The imaging device as claimed in claim 2 , further comprising a drive claim 2 ,wherein the bearing element is adjustable relative to the base element by the drive when the base element is fastened to the patient bed.4. The imaging device as claimed in claim 2 , wherein when the base element is fastened to the patient bed claim 2 , the bearing element is loaded to a neutral position relative to the base element claim 2 , andwherein when the ...

Подробнее
Номер записи: 61
02-05-2013 дата публикации

LOCAL COIL FOR MAGNETIC RESONANCE APPLICATIONS

Номер: US20130106419A1
Автор: Biber Stephan
Принадлежит:

A local coil includes a transmitter, to which magnetic resonance signals are supplied and which modulates a carrier signal oscillating at a carrier frequency using the magnetic resonance signals. The local coil includes a transmitting antenna, to which the modulated carrier signal is supplied and which sends the modulated carrier signal in a beam to a control and evaluation device of a magnetic resonance system. The beam has a mean direction of radiation. In a vertical plane containing the mean direction of radiation, the beam covers a vertical angle, and in a transverse plane containing the mean direction of radiation and running orthogonally to the vertical plane, the beam covers a transverse angle. The local coil includes an adjusting device that adjusts the mean direction of radiation independently of the orientation of the local coil relative to the vertical. 1. A local coil for magnetic resonance applications , the local coil comprising:a plurality of receiving antennae operable to receive magnetic resonance signals excited by an excitation signal in an object to be examined;a transmitter, to which the magnetic resonance signals are supplied, the transmitter operable to modulate a carrier signal oscillating at a carrier frequency using the magnetic resonance signals;a transmitting antenna, to which the modulated carrier signal is supplied, the transmitting antenna operable to send the modulated carrier signal in a beam to a control and evaluation device of a magnetic resonance system,wherein the beam has a mean direction of radiation,wherein in a vertical plane containing the mean direction of radiation, the beam covers a vertical angle and in a transverse plane containing the mean direction of radiation and running orthogonally to the vertical plane, the beam covers a transverse angle, and wherein the local coil further comprises an adjusting device that always adjusts the mean direction of radiation independently of an orientation of the local coil relative ...

Подробнее
Номер записи: 62
02-05-2013 дата публикации

SIGNAL PATH FOR A SMALL SIGNAL OCCURRING IN A MAGNETIC RESONANCE SYSTEM

Номер: US20130106537A1
Автор: Biber Stephan
Принадлежит:

A signal path for a small signal oscillating at a frequency of at least 20 GHz occurring in a magnetic resonance system has a signal source generating the small signal and a signal sink processing the small signal. The small signal is transmitted on a path from the signal source to the signal sink at least in a part section via a cable. The part section of the signal path, in which the small signal is transmitted via the cable, is embodied at least partly as a dielectric waveguide. The dielectric waveguide is disposed at least partly within an examination volume of the magnetic resonance system. The dielectric waveguide is delimited on a source side by a source-side mode converter and on a sink side, by a sink-side mode converter. The small signal is supplied to the source-side mode converter via a source-side electrical conductor and injected by the sink-side mode converter into a sink-side electrical conductor. 1. A signal path for a small signal oscillating at a frequency of at least 20 GHz occurring in a magnetic resonance system , the signal path comprising:a signal source operable to generate the small signal and a signal sink operable to process the small signal, the small signal, on a path from the signal source to the signal sink, being transmittable at least in a part section via a cable,wherein the part section is configured at least partly as a dielectric waveguide, the dielectric waveguide being disposed at least partly within an examination volume of the magnetic resonance system and being delimited on a source side by a source-side mode converter and on a sink side, by a sink-side mode converter,wherein the small signal is suppliable to the source-side mode converter via a source-side electrical conductor, andwherein the small signal is injectable by the sink-side mode converter into a sink-side electrical conductor.2. The signal path as claimed in claim 1 , wherein the small signal from the signal source is injectable into the source-side electrical ...

Подробнее
Номер записи: 63
23-05-2013 дата публикации

Gradient-Independent Shim Coil for a Local Coil of a Magnetic Resonance Device

Номер: US20130127468A1
Автор: Biber Stephan
Принадлежит:

A shim coil device for installation and/or arrangement within a local coil of a magnetic resonance device is provided. The shim coil device includes at least one shim coil formed by at least one conductor loop, and at least one compensation coil formed by at least one conductor loop. The at least one shim coil and the at least one compensation coil are arranged in a same coil plane. An overall arrangement of the at least one shim coil and the at least one compensation coil is symmetrical about a first central axis and a second central axis. The first central axis and the second central axis are perpendicular to each other and lie in the coil plane. An overall induction surface is enclosed by the at least one conductor loop of the at least one compensation coil corresponding to an overall induction surface enclosed by the at least one conductor loop of the at least one shim coil. 1. A shim coil device for a magnetic resonance device , the shim coil device , comprising:at least one shim coil formed by at least one conductor loop; andat least one compensation coil formed by at least one conductor loop,wherein the at least one shim coil and the at least one compensation coil are arranged in a same coil plane, and an overall arrangement of the at least one shim coil and the at least one compensation coil is symmetrical about a first central axis and a second central axis of the coil plane, andwherein the first central axis and the second central axis are perpendicular to each other and lie in the coil plane, and an overall induction surface is enclosed by the at least one conductor loop of the at least one compensation coil corresponding to an induction surface enclosed by the at least one conductor loop of the at least one shim coil.2. The shim coil device of claim 1 , wherein the shim coil device is arranged within a local coil so that a central plane containing the first central axis is perpendicular to the second central axis and contains the isocenter of the ...

Подробнее
Номер записи: 64
23-05-2013 дата публикации

Local Coil

Номер: US20130127469A1
Автор: Biber Stephan, Jahns Karsten, Kundner Thomas, Rothard Joerg
Принадлежит:

A local coil for an imaging system includes an anterior torso part and a posterior torso part that are detachably connected to one another with a fastening device. 1. A local coil for an imaging system , the local coil comprising:an anterior torso part; anda posterior torso part,wherein the anterior torso part and the posterior torso part are connected to one another, andwherein the anterior torso part and the posterior torso part are detachably connected to one another with a fastener.2. The local coil as claimed in claim 1 , wherein the local coil is a magnetic resonance tomography (MRT) local coil.3. The local coil as claimed in claim 1 , wherein the anterior torso part and the posterior torso part claim 1 , in a state resting on a patient or dummy claim 1 , are connected to one another.4. The local coil as claimed in claim 1 , wherein the local coil is configured as a piece of upper body clothing.5. The local coil as claimed in claim 1 , wherein the local coil is in the form of a vest that surrounds part of the torso of a patient.6. The local coil as claimed in claim 5 , wherein the vest is a sleeveless vest.7. The local coil as claimed in claim 1 , wherein the local coil is in the form of a wearable jacket with or without sleeves.8. The local coil as claimed in claim 1 , wherein the local coil is in the form of a piece of upper body clothing that surrounds the body of a patient or a dummy when worn anterior in a chest region claim 1 , in an abdominal region claim 1 , or in the chest region and in the abdominal region.9. The local coil as claimed in claim 1 , wherein the local coil is in the form of a piece of upper body clothing that surrounds the body of a patient or dummy when worn as a piece of clothing in a chest region claim 1 , in an abdominal region claim 1 , or in the chest region and in the abdominal region along a periphery about a longitudinal axis of the body.10. The local coil as claimed in claim 1 , further comprising a fastener for connecting an ...

Подробнее
Номер записи: 65
30-05-2013 дата публикации

Balancing Out a Field Inhomogeneity in a Magnetic Resonance Tomography System and Shim Coil Arrangement

Номер: US20130134978A1
Автор: Biber Stephan
Принадлежит:

In order to balance out a field inhomogeneity, a value for a coil current is determined by a controller as a function of an item of information relating to the field inhomogeneity and an item of information relating to a position of at least one balancing or shim coil arranged in the magnetic field. The value is to be supplied to the at least one shim coil in order to generate a magnetic balancing field to balance out the field inhomogeneity. A control signal for at least one shim current source and for at least one switching matrix coupling the at least one shim current source to the at least one shim coil is generated as a function of the at least one value. 1. A magnetic resonance tomography (MRT) system comprising:a controller configured to generate a control signal as a function of information relating to a field inhomogeneity of a magnetic field of the MRT system; andat least one controllable shim current source that is coupled to the controller, the at least one controllable shim current source being configured to generate a coil current as a function of the control signal,wherein the at least one shim current source is coupled to a plurality of shim coil connections via a controllable switching matrix, at least one shim coil being connectable to each shim coil connection of the plurality of shim coil connections in order to generate a magnetic balancing field.2. The MRT system as claimed in claim 1 , wherein the number of shim coil connections is greater than the number of shim current sources.3. The MRT system as claimed in claim 1 , wherein the at least one controllable shim current source comprises at least two shim current sources claim 1 , the at least two shim current sources differing in terms of a maximum generateable current strength claim 1 , a setting accuracy for a current strength claim 1 , a switching bandwidth claim 1 , or a combination thereof.4. The MRT system as claimed in claim 1 , wherein the at least one controllable shim current source ...

Подробнее
Номер записи: 66
30-05-2013 дата публикации

SHOULDER COIL HAVING A FLEXIBLE TOP PART AND/OR A MOUNTING-DEPENDENT ELEMENT SELECTION

Номер: US20130137970A1
Автор: Biber Stephan, Kurth Rainer, Zink Stephan
Принадлежит:

A shoulder coil for a magnetic resonance imaging device includes a bottom part and one or more top part elements that may be moved relative to the bottom part. The one or more top elements each have at least one coil therein. 1. A shoulder coil for a magnetic resonance imaging device , the shoulder coil comprising:a bottom part; andone or more top part elements that are moveable relative to the bottom part, at least one coil being located in each top part element of the one or more top part elements.2. The shoulder coil as claimed in claim 1 , wherein the bottom part is configured such that during magnetic resonance tomography (MRT) imaging claim 1 , the bottom part is located under a patient claim 1 , on an examination table claim 1 , or under the patient and on the examination table.3. The shoulder coil as claimed in claim 1 , wherein a top part element of the one or more top part elements is hingeable in a direction from next to a shoulder to be examined into a position partially or completely above the shoulder.4. The shoulder coil as claimed in claim 3 , wherein another top part element of the one or more top part elements is hingeable in a direction from next to the shoulder to be examined into a position partially or completely above the shoulder.5. The shoulder coil as claimed in claim 1 , wherein a top part element of the one or more top part elements is hingeable in a direction from laterally claim 1 , cranially claim 1 , or laterally and cranially next to a shoulder to be examined into a position partially or completely above the shoulder.6. The shoulder coil as claimed in claim 1 , wherein the one or more top part elements are moveable relative to the bottom part claim 1 , andwherein the one or more top part elements each include at least one coil.7. The shoulder coil as claimed in claim 1 , wherein at least one top part element of the one or more top part elements each includes a plurality of coils.8. The shoulder coil as claimed in claim 1 , wherein at ...

Подробнее
Номер записи: 67
27-06-2013 дата публикации

SELECTION UNIT FOR A MAGNETIC RESONANCE IMAGING SYSTEM

Номер: US20130162253A1
Автор: Biber Stephan, Bollenbeck Jan, Oppelt Ralph, Rauh Georg, Schnell Wilfried, Vester Markus
Принадлежит:

A selection unit for a magnetic resonance imaging system may be provided. The selection unit electrically connects a first number of electrical terminals to a second number of communication entities. The selection unit is arranged in and/or on a mobile object-support element for moving an examination object which is to be depicted by the magnetic resonance imaging system into a recording position. 1. A device comprising:a selection unit for a magnetic resonance imaging system and configured to electrically connect a first number of electrical terminals to a second number of communication entities,wherein the selection unit is arranged in and/or on a mobile object-support element for moving an examination object into a recording position.2. The device as claimed in claim 1 , wherein the first number is different from the second number.3. The device as claimed in claim 2 , wherein the first number is greater than the second number.4. The device as claimed in claim 1 , wherein the electrical terminals comprise an antenna element for a magnetic resonance signal.5. The device as claimed in claim 1 , wherein the electrical terminals comprise a tuning element for tuning an antenna element for a magnetic resonance signal.6. The device as claimed in claim 3 , wherein the electrical terminals comprise a tuning element for tuning the antenna element for the magnetic resonance signal.7. The device as claimed in claim 1 , wherein the communication entities comprise receivers for a magnetic resonance signal.8. The device as claimed in claim 5 , wherein the communication entities comprise receivers for the magnetic resonance signal.9. The device as claimed in claim 1 , wherein the communication entities comprise a trigger device for a tuning element configured to tune an antenna element for a magnetic resonance signal.10. The device as claimed in claim 4 , wherein the communication entities comprise a trigger device for the tuning element.11. The device as claimed in claim 5 , ...

Подробнее
Номер записи: 68
27-06-2013 дата публикации

Breast Coil for Magnetic Resonance Recordings of the Breast

Номер: US20130165768A1
Автор: Stephan Biber
Принадлежит: Individual

A breast coil for a magnetic resonance tomography device for the production of magnetic resonance recordings of female breasts includes a coil housing having a breast recess to accommodate a breast and a number of coil elements. At least one of the coil elements forms an HF correction coil element and has a circuit arrangement to switch over the HF correction coil element between an HF correction mode of operation and another mode of operation. The HF correction coil element is constructed such that in the HF correction mode of operation, the HF correction coil element resonates passively with a B 1 field emitted by a transmission antenna arrangement of the magnetic resonance tomography device, and influences a local B 1 field distribution during a magnetic resonance recording.

Подробнее
Номер записи: 69
18-07-2013 дата публикации

Automatic control of the power consumption of a magnetic resonance facility

Номер: US20130181708A1
Автор: Björn HEISMAN, Markus Vester, Sebastian Schmidt, Stephan Biber, Volker Matschl
Принадлежит: Individual

A method for operating a magnetic resonance facility is proposed. The magnetic resonance facility has a number of power-consuming components. The power consumption is determined for each component. Operation of the components is controlled based on at least one criterion so that a predetermined threshold value for the overall power consumption of the magnetic resonance facility is not exceeded.

Подробнее
Номер записи: 70
18-07-2013 дата публикации

MRT Local Coil Position Detection in an MRT System

Номер: US20130181715A1
Автор: Biber Stephan
Принадлежит:

Magnetic resonance tomography (MRT) local coil positioning by RFID is enabled with a positioning device to detect a position of a first object relative to a position of an additional object that includes at least one RFID tag arranged on the first object and/or at least one RFID reader arranged on the additional object. 1. A positioning device for detection of a position of a first object relative to a position of an additional object , the positioning device comprising:at least one RFID tag arranged on the first object, at least one RFID reader arranged on the additional object, or a combination thereof.2. The positioning device as claimed in claim 1 , wherein one object of the first object and the additional object is a magnetic resonance tomography (MRT) local coil and the other object of the first object and the additional objection is part of an MRT system.3. The positioning device as claimed in claim 2 , wherein the part of the MRT system comprises an additional local coil at a location known to an MRT controller claim 2 , a patient table or an MRT bore.4. The positioning device as claimed in claim 2 , wherein the at least one RFID tag or at the least one RFID reader is arranged on the MRT local coil.5. The positioning device as claimed in claim 2 , wherein the at least one RFID tag or the at least one RFID reader is in a patient table claim 2 , in a coil of the MRT system arranged on the patient table claim 2 , at an entrance of an MRT bore claim 2 , in the MRT bore claim 2 , or a combination thereof.6. The positioning device as claimed in claim 1 , wherein the at least one RFID tag is arranged on the first object claim 1 , andwherein the at least one RFID tag comprises an array of RFID tags each with an antenna, the array of RFID tags being arranged in an MRT patient table, a vertebral column coil, in a bore of an MRT, or a combination thereof.7. The positioning device as claimed in claim 1 , wherein the positioning device is configured so that when there is ...

Подробнее
Номер записи: 71
25-07-2013 дата публикации

Local coil and manufacture of mechanically preformed, flexible local coils for mri

Номер: US20130190607A1
Автор: Hubertus Fischer, Jörg Rothard, Stephan Biber, Thomas Kundner
Принадлежит: SIEMENS AG

A method for manufacturing a local coil for a magnetic resonance tomography device includes manufacturing the local coil with a flat cross-section. The method also includes deforming the local coil from the flat cross-section into a curved cross-section.

Подробнее
Номер записи: 72
01-08-2013 дата публикации

LOCAL COIL WITH A NUMBER OF SEPARATELY SWITCHABLE LOCAL COIL SHIM COILS

Номер: US20130193968A1
Автор: Biber Stephan
Принадлежит: SIEMENS AKTIENGESELLSCHAFT

A local coil for an imaging system includes a number of shim coils. A current for generating a shim field in one of the shim coils may be switched on and switched off. A current for generating a shim field in another of the shim coils may be switched on and switched off. The currents may be switched on and switched off independently of one another for generating a respective shim field in the shim coils. 1. A local coil for an imaging system , the local coil comprising:a plurality of shim coils,wherein a current for generating a shim field in one shim coil of the plurality of shim coils is switchable on and switchable off,wherein a current for generating a shim field in another shim coil of the plurality of shim coils is switchable on and switchable off, andwherein the currents for generating the shim fields are switchable on and switchable off independently of one another in the one shim coil and the other shim coil.2. The local coil as claimed in claim 1 , wherein the imaging system comprises a magnetic resonance tomography (MRT) device.3. The local coil as claimed in claim 1 , wherein one or more shim coils of the plurality of shim coils comprise leads claim 1 , andwherein the leads are rectangular in cross-section.4. The local coil as claimed in claim 1 , wherein a shim coil of the plurality of shim coils comprises a plurality of rectangular-shaped leads claim 1 , andwherein the plurality of rectangular-shaped leads are connected in series to one another.5. The local coil as claimed in claim 1 , wherein one or more shims of the plurality of shims comprise leads that are at least approximately rectangular in cross-section claim 1 , a side of the rectangular cross-section configured to rest against the patient claim 1 , andwherein the side is arched in shape, curves down into a shim coil interior, or a combination thereof.6. The local coil as claimed in claim 1 , wherein several shim coils of the plurality of shim coils are controllable independently of one ...

Подробнее
Номер записи: 73
15-08-2013 дата публикации

LOCAL COIL ARRANGEMENT HAVING INTEGRATED SHIM CONDUCTOR

Номер: US20130207655A1
Автор: Biber Stephan
Принадлежит: SIEMENS AKTIENGESELLSCHAFT

When a portion of a structure enclosing a local coil is inserted in a homogeneity region of a basic magnetic field of a magnetic resonance system, the local coil is operable to receive magnetic resonance signals originating from a specific detection zone for the local coil arrangement. At least one conductor is arranged in the structure. Field lines of a compensation magnetic field generated by current encircling the conductor form a compensation magnetic field angle with the basic magnetic field in an edge area of the detection zone. Return conductors complete an electric circuit containing the conductor and extend in the direction of the basic magnetic field and/or are arranged such that field lines of an interfering magnetic field counteracting the compensation magnetic field encircle the respective return conductor and form an interfering magnetic field angle with the basic magnetic field in the edge area. 1. A local coil arrangement for magnetic resonance purposes , the local coil arrangement comprising:a mechanical holding structure, in which at least one local coil is arranged, wherein when the entirety or a portion of the mechanical holding structure surrounds the at least one local coil and is inserted in a homogeneity region of a basic magnetic field of a magnetic resonance system, the local coil or another receive coil is operable to receive magnetic resonance signals originating from a specific detection zone for the local coil arrangement;at least one conductor arranged in the mechanical holding structure, wherein the at least one conductor is exposable to direct current or low-frequency alternating current, the at least one conductor being arranged in the mechanical holding structure, such that the at least one conductor extends orthogonally to a direction of the basic magnetic field, and wherein field lines of a compensation magnetic field generated when the at least one conductor is exposed to the direct current or the low-frequency alternating ...

Подробнее
Номер записи: 74
29-08-2013 дата публикации

Shoulder Local Coil System for a Magnetic Resonance Tomography System

Номер: US20130225980A1
Автор: Biber Stephan, Kurth Rainer, Zink Stephan
Принадлежит:

A shoulder local coil system for a magnetic resonance tomography system for generating magnetic resonance images of a shoulder region of a person to be examined is provided. The shoulder local coil system includes a base plate, a fixed or removable cover plate over the base plate, and a flexible local coil arranged wholly or partially movably between the base plate and the cover plate. 1. A shoulder local coil system for a magnetic resonance tomography system for generating magnetic resonance images of a shoulder region of person to be examined , the shoulder local coil system comprising:a base plate;a cover plate over the base plate, the cover plate being fixed or removable; anda flexible local coil arranged wholly or partially movably between the base plate and the cover plate.2. The shoulder local coil system as claimed in claim 1 , wherein the flexible local coil comprises:a first coil section comprising first antennas arranged in operation wholly or partially in alignment with the cover plate; anda second coil section comprising second antennas arranged in operation outside a region between the base plate and the cover plate movably relative to the first coil section.3. The shoulder local coil system as claimed in claim 1 , wherein the first coil section is tiltable out of a first position claim 1 , in which the first coil section and the second coil section lie in a first plane arranged substantially parallel to the base plate claim 1 , into a second position claim 1 , in which the second coil section lies wholly or partially in a second plane above the shoulder claim 1 , the second plane being substantially parallel to the first plane.4. The shoulder local coil system as claimed in claim 2 , further comprising a flexible third coil section claim 2 , the flexible third coil second comprising third antennas arranged between the first coil section and the second coil section.5. The shoulder local coil system as claimed in claim 4 , wherein the flexible third ...

Подробнее
Номер записи: 75
05-09-2013 дата публикации

Local Screen and Method for the Screening Out of Magnetic Resonance Signals

Номер: US20130229178A1
Автор: Biber Stephan, Rothard Jörg
Принадлежит:

A local screen screens out magnetic resonance signals of an object under examination during magnetic resonance imaging with a magnetic resonance device. The local screen includes a plurality of electrically conductive local screen elements that are arranged such that no direct electrically conductive connection pertains between the local screen elements. The local screen further includes a carrier device for accommodating the local screen elements and a number of switching devices that are connected in an electrically conductive manner to the local screen element, and are embodied such that the electrical resistance may be controlled by a number of screen control signals. In addition, the local screen includes a number of screen control signal inputs for the number of screen control signals. 1. A local screen for screening out magnetic resonance signals from an object under examination during magnetic resonance imaging with a magnetic resonance device , the local screen comprising:a plurality of local screen elements that are electrically conductive and are arranged such that no direct electrically conductive connection pertains between the plurality of local screen elements;a carrier device operable to accommodate the plurality of local screen elements;a plurality of switching devices that are connected in an electrically conductive manner to the plurality of local screen elements, the plurality of switching devices being configured such that electrical resistance of the plurality of switching devices is controllable by a plurality of screen control signals; anda plurality of screen control signal inputs for the plurality of screen control signals.2. The local screen as claimed in claim 1 , wherein the local screen comprises a localization device operable to determine a position of the local screen with the magnetic resonance device.3. The local screen as claimed in claim 2 , wherein the localization device comprises a local receiving antenna device.4. The local ...

Подробнее
Номер записи: 76
05-09-2013 дата публикации

Magnetic Resonance Facility Having a Cylindrical Patient Receiving Unit and Patient Capsule

Номер: US20130229181A1
Автор: Biber Stephan, Heismann Björn, Matschl Volker, Schmidt Sebastian, Vester Markus
Принадлежит:

A magnetic resonance facility having a cylindrical patient receiving unit includes a high-frequency shield. The high-frequency shield is disposed to enclose the patient receiving unit and shield at least one high-frequency coil from a gradient coil arrangement. The high-frequency shield is extendable to form a shielded chamber that shields the high-frequency coil from high-frequency signals outside the shielded chamber. 1. A magnetic resonance facility having a cylindrical patient receiving unit , the magnetic resonance facility comprising:a high-frequency shield disposed to enclose the patient receiving unit and shield at least one high-frequency coil from a gradient coil arrangement,wherein the high-frequency shield is configured to be extended to form a shielded chamber, the shielded chamber configured to shield the at least one high-frequency coil from high-frequency signals outside the shielded chamber.2. The magnetic resonance facility as claimed in claim 1 , wherein the shielded chamber has an axial length selected to accommodate a patient claim 1 , selected to be longer than a length of a patient couch claim 1 , or selected to accommodate the patient and to be longer than the length of the patient couch.3. The magnetic resonance facility as claimed in claim 1 , wherein the axial length of the shielded chamber is at least two meters.4. The magnetic resonance facility as claimed in claim 1 , wherein the high-frequency shield is cylindrical claim 1 , andwherein the cylindrical high-frequency shield is continued, at least to one side, in the manner of a cylindrical component.5. The magnetic resonance facility as claimed in claim 4 , wherein the cylindrical component has a closed shield surface outside the high-frequency shield.6. The magnetic resonance facility as claimed in claim 4 , wherein the cylindrical component is configured as an open attenuating hollow conductor.7. The magnetic resonance facility as claimed in claim 6 , wherein the open attenuating ...

Подробнее
Номер записи: 77
19-09-2013 дата публикации

MAGNETIC RESONANCE APPARATUS HAVING RECEIVE COILS AND METHOD FOR OPERATING A MAGNETIC RESONANCE APPARATUS

Номер: US20130241547A1
Автор: Biber Stephan, Huber Klaus
Принадлежит: SIEMENS AKTIENGESELLSCHAFT

A magnetic resonance apparatus includes receive coils and a receiver device for processing magnetic resonance signals received by coil elements of the receive coils. The receive coils are subdivided into at least a first group having at least one receive coil and a second group having at least one receive coil. The receive coils of the first group are connected to the receiver device via a hardwired communications link, and the receive coils of the second group are each connectable or connected to the receiver device via a wireless communications link. 1. A magnetic resonance apparatus comprising:receive coils; anda receiver device operable to process magnetic resonance signals received by coil elements of the receive coils,wherein the receive coils are subdivided into at least a first group having at least one of the receive coils and a second group having at least one of the receive coils, andwherein the at least one receive coil of the first group is connected to the receiver device via a hardwired communications link, and the at least one receive coil of the second group is connectable or connected to the receiver device via a wireless communications link.2. The magnetic resonance apparatus as claimed in claim 1 , wherein the first group comprises all posterior local coils claim 1 , all local coils integrated into a patient couch claim 1 , all local coils that are placeable onto the patient couch using a connection mechanism claim 1 , or a combination thereof claim 1 , andwherein the second group comprises all anterior local coils, all freely positionable local coils, local coils that are to be deployed for specific applications only, or a combination thereof.3. The magnetic resonance apparatus as claimed in claim 1 , wherein at least some of the receive coils include a digitizing device claim 1 , the digitizing device operable to digitize the magnetic resonance signals inside the receive coil.4. The magnetic resonance apparatus as claimed in claim 1 , wherein ...

Подробнее
Номер записи: 78
19-09-2013 дата публикации

MAGNETIC RESONANCE COIL WITH OVERLAPPING COIL ELEMENTS

Номер: US20130241557A1
Автор: Biber Stephan, Driemel Daniel, Greim Helmut, Wolf Steffen
Принадлежит: SIEMENS AKTIENGESELLSCHAFT

A magnetic resonance coil for transmitting and/or receiving magnetic resonance signals is provided. The magnetic resonance coil includes at least two overlapping coil elements. Coil conductors of the at least two overlapping coil elements intersect in intersection regions and are arranged on a support. Mutually overlapping coil elements of the at least two overlapping coil elements are arranged on different sides of the support. The support is formed from at least three layers of a support material. A cavity that is filled with air or a filler material, the dielectric constant of the filler material being lower than the dielectric constant of the support material, is provided in the intersection regions in a middle layer of the at least three layers. 1. A magnetic resonance coil for transmitting , receiving , or transmitting and receiving magnetic resonance signals , the magnetic resonance coil comprising:at least two overlapping coil elements, coil conductors of the at least two overlapping coil elements intersecting in intersection regions and being arranged on a support,wherein mutually overlapping coil elements of the at least two overlapping coil elements are arranged on different sides of the support,wherein the support is formed from at least three layers of a support material, andwherein a cavity that is filled with air or a filler material, the dielectric constant of the filler material being lower than that of the support material, is provided in the intersection regions in a middle layer of the at least three layers.2. The magnetic resonance coil as claimed in claim 1 , wherein a loss factor of the filler material is lower than a loss factor of the support material.3. The magnetic resonance coil as claimed in claim 1 , wherein the dielectric constant of the filler material is less than 2 claim 1 , a loss factor of the filler material is less than 0.001 claim 1 , or the dielectric constant of the filler material is less than 2 and the loss factor of the ...

Подробнее
Номер записи: 79
26-09-2013 дата публикации

MATERIAL FOR USE IN A MAGNETIC RESONANCE INSTALLATION, METHOD FOR MANUFACTURING SAID MATERIAL, AND MAGNETIC RESONANCE INSTALLATION

Номер: US20130249556A1
Автор: Biber Stephan
Принадлежит:

A material for a magnetic resonance installation is provided, wherein the material includes a support material and a magnetic doping material which is admixed in a specific proportion. The doping material exhibits an anisotropic susceptibility. In respect of the anisotropic susceptibility, the doping material exhibits a mean orientation along a predefined direction. An essentially homogeneous intermixture of the support material and the doping material is present within a volume of the material which is smaller than 1 mm. 1. A material for a magnetic resonance installation , the material comprising:a support material and a magnetic doping material which is admixed in a specific proportion,wherein the doping material exhibits an anisotropic susceptibility,wherein the doping material exhibits a mean orientation along a predefined direction in respect of the anisotropic susceptibility, and{'sup': '3', 'wherein an essentially homogeneous intermixture of the support material and the doping material is present within a volume of the material which is smaller than 1 mm.'}2. The material as claimed in claim 1 , wherein the doping material exhibits the mean orientation within the volume of the material.3. The material as claimed in claim 1 , wherein the mean orientation and/or a standard deviation of the mean orientation exhibits a location dependency claim 1 , and wherein the location dependency has a characteristic length of less than 1 mm.4. The material as claimed in claim 1 , wherein the mean orientation results in a maximized susceptibility along the predetermined direction.5. The material as claimed in claim 1 , wherein a standard deviation of the mean orientation is less than 45°.6. The material as claimed in claim 1 , wherein a grain size of the doping material is smaller than 200 μm.7. The material as claimed in claim 1 , wherein the specific proportion lies in the range of 0.1%-80%.8. The material as claimed in claim 1 , wherein the support material is selected ...

Подробнее
Номер записи: 80
26-09-2013 дата публикации

MATERIAL FOR USE IN A MAGNETIC RESONANCE SYSTEM, METHOD FOR PRODUCING THE MATERIAL AND MAGNETIC RESONANCE SYSTEM

Номер: US20130249557A1
Автор: Biber Stephan, Candidus Yvonne, Fischer Hubertus, Greiner Robert, Kundner Thomas
Принадлежит:

A material for use in a magnetic resonance system includes a carrier material and a doping material. The carrier material and the doping material are admixed in a specific proportion. A volume of the material smaller than 1 mmcontains a substantially homogeneous intermixing of the carrier material and the doping material. 1. A material for use in a magnetic resonance system , the material comprising:a carrier material and a magnetic doping material which is admixed in a specific proportion,{'sup': '3', 'wherein a volume of the material which is smaller than 1 mmcontains a substantially homogeneous intermixing of the carrier material and the doping material.'}2. The material as claimed in claim 1 , wherein a particle size of the doping material is smaller than approximately 200 μm.3. The material as claimed in claim 2 , wherein the particle size of the doping material is smaller than approximately 10 μm.4. The material as claimed in claim 1 , wherein the doping material comprises magnetic nanoparticles and wherein a particle size of the doping material is smaller than approximately 1 μm.5. The material as claimed in claim 4 , wherein the particle size of the doping material is smaller than approximately 100 nm6. The material as claimed in claim 4 , wherein the magnetic nanoparticles are ferromagnetic.7. The material as claimed in claim 1 , wherein the proportion is in the range of 0.1% -80%.8. The material as claimed in claim 7 , wherein the proportion is in the range of 1% -20%.9. The material as claimed in claim 1 , wherein the carrier material is an acrylonitrile butadiene styrene (ABS) plastic.10. The material as claimed in claim 1 , wherein the carrier material is selected from the group consisting of : thermoplastics claim 1 , thermoplastic elastomers claim 1 , elastomers claim 1 , thermosets claim 1 , foams11. The material as claimed in claim 1 , wherein the doping material is selected from a first group of diamagnetic materials consisting of the elements: ...

Подробнее
Номер записи: 81
26-09-2013 дата публикации

Multi-Layer Cushion for Optimum Adjustment to Anatomy and for Susceptibility Adjustment

Номер: US20130249559A1
Автор: Biber Stephan
Принадлежит:

A shim cushion for a magnetic resonance tomography system includes at least two layers. A first layer of the at least two layers includes both a higher deformability and also a lower susceptibility than a second layer of the at least two layers. 1. A shim cushion for a magnetic resonance tomography system , the shim cushion comprising:at least two layers,wherein a first layer of the at least two layers has a higher deformability and a lower susceptibility than a second layer of the at least two layers.2. The shim cushion as claimed in claim 1 , wherein the second layer claim 1 , which is further remote from a patient surface in a system on the patient than the first layer claim 1 , has both a higher deformability and also a lower susceptibility than the first layer claim 1 , which is closer to the patient surface with the system provided on the patient.3. The shim cushion as claimed in claim 1 , wherein the higher deformability of the first layer contains a higher elastic compressibility claim 1 , a higher elastic deformability claim 1 , or a higher compressibility and deformability than the second layer.4. The shim cushion as claimed in claim 1 , wherein a ratio of a diameter of the first layer in an uncompressed state to a diameter of the first layer in a state compressed by a load is greater than a ratio of a diameter of the second layer in an uncompressed state relative to a diameter of the second layer in a state compressed by a load.5. The shim cushion as claimed in claim 1 , wherein the shim cushion has an arched cross-section.6. The shim cushion as claimed in claim 5 , wherein the arched cross-section is U-shaped.7. The shim cushion as claimed in claim 6 , wherein the U-shaped cross-section has an opening for receiving a body part on one side.8. The shim cushion as claimed in claim 1 , further comprising a third layer disposed on an interior of the shim cushion claim 1 , the third layer having a lower deformability and a higher susceptibility than the ...

Подробнее
Номер записи: 82
17-10-2013 дата публикации

Shim Coil Arrangement for an Extremity of a Patient

Номер: US20130274594A1
Автор: Biber Stephan
Принадлежит:

A shim coil arrangement for at least one extremity of a patient such as a forearm and/or a hand for use in a magnetic resonance device is provided. The shim coil arrangement is arranged surrounding a receptacle for the at least one extremity. At least two planar shim coils having a common coil plane that lies at right angles to a direction of a basic magnetic field of the magnetic resonance device in a usage state and/or to a longitudinal direction of the receptacle are arranged around a circumference of the receptacle. A plurality of coil planes succeeding one another in the direction of the basic magnetic field of the magnetic resonance device in the usage state and/or the longitudinal direction of the receptacle and at right angles to the direction of the basic magnetic field and/or the longitudinal direction are provided with at least two planar shim coils. 1. A shim coil arrangement for at least one extremity of a patient for use in a magnetic resonance device , wherein the shim coil arrangement is arranged surrounding a receptacle for the at least one extremity , the shim coil arrangement comprising:at least two planar shim coils having a common coil plane that lies at right angles to a direction of a basic magnetic field of the magnetic resonance device in a usage state, to a longitudinal direction of the receptacle, or to the direction of the basic magnetic field of the magnetic resonance device in the usage state and the longitudinal direction of the receptacle, the at least two planar shim coils being arranged around the circumference of the receptacle,wherein a plurality of coil planes succeeding one another in the direction of the basic magnetic field of the magnetic resonance device in the usage state, the longitudinal direction of the receptacle, or the basic magnetic field of the magnetic resonance device in the usage state and the longitudinal direction of the receptacle and at right angles to the direction of the basic magnetic field of the magnetic ...

Подробнее
Номер записи: 83
02-01-2014 дата публикации

Automatic Detuning of Non-Connected Transceiver Coils for MRI

Номер: US20140002085A1
Автор: Biber Stephan, Huber Klaus
Принадлежит:

Methods and a device for automatic detuning of a magnetic resonance tomography (MRT) local coil not connected to an MRT system are provided. The device has self-closing switches that are closed or open, depending on the presence of an MRT high-frequency field. 1. A device for automatic detuning of a magnetic resonance tomography (MRT) local coil not connected to an MRT system , the device comprising:self-closing switches that are closed or open depending on the presence of an MRT high-frequency field.2. The device as claimed in claim 1 , wherein the self-closing switches are configured so that claim 1 , in a state with an MRT RF field present claim 1 , the self-closing switches are closed by self-closing claim 1 , and in a state without an MRT RF field claim 1 , the self-closing switches are open.3. The device as claimed in claim 1 , wherein a transceiver branch of the MRT local coil configured for transmitting RF transmit signals and for receiving RF receive signals has automatically closed switches when an MRT-RF field is present and has automatically open switches without the presence of an MRT-RF field.4. The device as claimed in claim 1 , wherein an inductance conditional on a length of a connecting cable of the MRT local coil forms a resonant parallel circuit together with a coupling capacitor on the MRT local coil.5. The device as claimed in claim 1 , wherein each of the self-closing switches is a PIN diode.6. The device as claimed in claim 5 , wherein the PIN diode is a PIN diode self-powered by the MRT-RF field.7. The device as claimed in claim 1 , wherein a switch of the self-closing switches is a switch that self closes for a strength of an MRT-RF field lying above a threshold value claim 1 , the switch being open with a strength of an MRT-RF field lying below a threshold value.8. The device as claimed in claim 1 , wherein in a state in which transmit signals to be transmitted to the MRT local coil from the MRT system are present claim 1 , the self- ...

Подробнее
Номер записи: 84
09-01-2014 дата публикации

Hearing protection apparatus as well as a medical imaging apparatus having the hearing protection apparatus and a method for detecting movement of a patient's head

Номер: US20140012127A1
Автор: Lars Lauer, Stephan Biber
Принадлежит: SIEMENS AG

A hearing protection apparatus includes a first ear coupling unit, which is designed for positioning on a first ear of a user, a second ear coupling unit, which is designed for positioning on a second ear of the user, and a sound protection for at least partial shielding of sound waves, wherein the hearing protection apparatus has at least one motion sensor unit.

Подробнее
Номер записи: 85
13-02-2014 дата публикации

Activation of Transmit/Receive Arrays for Decoupling During Transmission

Номер: US20140043029A1
Автор: Biber Stephan, Huber Klaus
Принадлежит:

A system for electromagnetic excitation of an object under examination during magnetic resonance tomography includes a radio frequency (RF) device for generating a radio-frequency signal and a plurality of antennas for emitting the radio-frequency signal. A signal connection exists between the output of the RF device and the plurality of antennas. A source impedance of the signal connection to the output of the RF device at a connection point of the plurality of antennas is significantly higher than the impedance of the plurality of antennas at the connection points, so that the plurality of antennas are fed in a current source feed mode if a radio-frequency signal is present. 1. A system for electromagnetic excitation of an object under examination during magnetic resonance tomography , the system comprising:a radio frequency (RF) device configured to generate a radio-frequency signal;a plurality of antennas configured to emit the radio-frequency signal; anda signal connection between an output of the RF device and the plurality of antennas,wherein a source impedance of the signal connection with the output of the RF device at connection points of the plurality of antennas is higher than an impedance of the plurality of antennas at the connection points, so that the plurality of antennas are fed in a current source feed mode when the radio-frequency signal is present.2. The system as claimed in claim 1 , wherein the source impedance of the signal connection with the output of the RF device at the connection points of the plurality of antennas is higher by at least a factor of 2 than the impedance of the plurality of antennas at the connection points.3. The system as claimed in claim 1 , wherein the RF device further comprises an input operable to process a receive signal claim 1 ,wherein the system further comprises a switch and a signal connection between an input of the RF device and the plurality of antennas, andwherein the switch is configured to optionally ...

Подробнее
Номер записи: 86
20-02-2014 дата публикации

TWO-PART LOCAL SHOULDER COIL, AND MAGNETIC RESONANCE TOMOGRAPHY APPARATUS AND METHOD EMPLOYING SAME

Номер: US20140051982A1
Автор: Biber Stephan, He He Zeng, Ma Li, Wang Hai Ning, Wang Jian Min
Принадлежит: SIEMENS AKTIENGESELLSCHAFT

Improved patient comfort is provided by a symmetric local coil arrangement designed to support the production of an MRT image of a shoulder, wherein the housing of the local coil arrangement is composed of two separable parts. The symmetric local shoulder coil arrangement is designed to be useable for either of a right or left shoulder of a human subject by rotating the local coil arrangement about a rotational axis that is parallel to an axis of symmetry of the local shoulder coil and perpendicular to anterior and posterior members of the shoulder coil. 1. A method for selectively acquiring magnetic resonance (MR) signals from either a right shoulder or a left shoulder of an examination subject using a single shoulder of an examination subject using a single shoulder coil arrangement , said method comprising:configuring a shoulder coil arrangement comprising, a unitary housing and radio frequency (RF) coil contained in said unitary housing, to have a first portion and a second portion that together form a recess between said first portion and said second portion that is shaped to receive a human shoulder;configuring said coil arrangement to make said first and second portions three-dimensionally diagonally symmetric with respect to a diagonal plane of symmetry of said housing;when acquiring MR signals from a left shoulder of a subject, placing said shoulder coil arrangement on the left shoulder with the left shoulder in said recess and with said first portion anterior said left shoulder and said second portion posterior said left shoulder;when acquiring MR signals from a right shoulder of a subject, placing said shoulder coil arrangement on the right shoulder with the right shoulder in said recess and with said first portion anterior said right shoulder and said second portion posterior said left shoulder; andselectively acquiring said MR signals from the left shoulder or the right shoulder, depending on which of the left or right shoulders said coil arrangement is ...

Подробнее
Номер записи: 87
27-02-2014 дата публикации

Identifying a Position of Transmission/Reception Coils of a Magnetic Resonance Imaging Scanner with Labels Read in Motion

Номер: US20140055127A1
Автор: Biber Stephan, Metz Gerhard
Принадлежит:

A method and a device for identifying a position of a local coil of a magnetic resonance imaging scanner relative to a position of a patient couch are provided. The device includes at least one reading unit that is configured to determine a position of at least one label at the local coil relative to the at least one reading unit. The device also includes a position determination apparatus that is configured to determine the position of the patient couch relative to the magnetic resonance imaging scanner. The device includes a position determination apparatus that is configured to determine the position of the local coil relative to the patient couch based on the determined position of the at least one label and the determined position of the patient couch. 1. A method for identifying a position of a local coil of a magnetic resonance imaging scanner relative to a patient couch with the aid of at least one read label , the method comprising:determining a position of the at least one label relative to at least one reading unit;determining a position of the patient couch relative to the magnetic resonance imaging scanner; anddetermining the position of the at least one label relative to the patient couch from the position of the at least one label relative to the at least one reading unit and from the position of the patient couch relative to the magnetic resonance imaging scanner.2. The method as claimed in claim 1 , further comprising reading the at least one label wirelessly during a movement of the at least one label claim 1 , of the local coil claim 1 , or of the at least one label and the local coil relative to the at least one reading unit.3. The method as claimed in claim 1 , wherein the at least one label or the at least one reading unit is arranged at the magnetic resonance imaging scanner.4. The method as claimed in claim 3 , wherein the at least one label or the at least one reading unit is arranged at a bore or at an entrance to the bore of the magnetic ...

Подробнее
Номер записи: 88
27-02-2014 дата публикации

Identifying the Static Position of Transmission/Reception Coils of a Magnetic Resonance Imaging Scanner with the Aid of Electronically Readable Labels

Номер: US20140055132A1
Автор: Biber Stephan, Metz Gerhard
Принадлежит:

A device for identifying a position of a local coil of a magnetic resonance imaging scanner relative to a position of a patient couch includes at least one label configured to transmit a signal with at least one identity number wirelessly, and at least one reading unit with a reading-unit antenna. The at least one reading unit is configured to receive the signal. The device also includes a position determination apparatus configured to determine the position of the local coil relative to the patient couch. 1. A device for identifying a position of a local coil of a magnetic resonance imaging scanner relative to a position of a patient couch , the device comprising:at least one label that is configured to transmit a signal with at least one identity number wirelessly;at least one reading unit comprising a reading-unit antenna, the at least one reading unit being configured to receive the signal; anda position determination apparatus that is configured to determine the position of the local coil relative to the patient couch.2. The device as claimed in claim 1 , wherein the position determination apparatus is configured to determine the position of the local coil relative to the position of the patient couch while the patient couch is static claim 1 , unmoved claim 1 , or static and unmoved relative to a housing of a magnetic resonance imaging (MRI) scanner claim 1 , while the patient couch is still situated outside of the MRI scanner claim 1 , or a combination thereof.3. The device as claimed in claim 1 , wherein the reading-unit antenna is arranged on the local coil and the at least one label is arranged on the patient table claim 1 , the reading-unit antenna is arranged on the patient table and the at least one label is arranged on the local coil claim 1 , or a combination thereof.4. The device as claimed in claim 1 , wherein the position determination apparatus is configured to determine the position of the local coil relative to the position of the patient couch ...

Подробнее
Номер записи: 89
27-02-2014 дата публикации

Identifying Transmission/Reception Coils of a Magnetic Resonance Imaging Scanner with the Aid of Electronically Readable Labels

Номер: US20140055148A1
Автор: Biber Stephan, Metz Gerhard
Принадлежит:

A device for identifying a local coil property of a local coil for a magnetic resonance imaging scanner includes at least one label configured to transmit at least one identity number wirelessly. The device also includes at least one reading unit with a reading-unit antenna. The reading unit is configured to receive the at least one identity number. The device includes an identification apparatus configured to identify a local coil property of the local coil based on the at least one received identity number. 1. A device for identifying a local coil property of a local coil for a magnetic resonance imaging scanner , the device comprising:a label configured to transmit an identity number wirelessly;a reading unit comprising a reading-unit antenna, the reading unit configured to receive the identity number; andan identification apparatus configured to identify the local coil property of the local coil based on the received identity number.2. The device as claimed in claim 1 , wherein one or more labels are integrated on the local coil or in a housing of the local coil claim 1 , the one or more labels comprising the label claim 1 , andwherein one or more reading-unit antennas are arranged on a patient table or integrated in a housing of the patient table, the reading-unit antenna being one of the one or more reading-unit antennas.3. The device as claimed in claim 1 , wherein one or more labels are integrated on the local coil or in a housing of the local coil claim 1 , the one or more labels comprising the label claim 1 , andwherein one or more reading-unit antennas are arranged on or integrated in a magnetic resonance imaging (MRI) scanner, the reading-unit antenna being one of the one or more reading-unit antennas.4. The device as claimed in claim 1 , wherein one or more reading-unit antennas are arranged on the local coil or integrated in a housing of the local coil claim 1 , the one or more reading-unit antennas comprising the reading-unit antenna claim 1 , ...

Подробнее
Номер записи: 90
13-03-2014 дата публикации

MAGNETIC RESONANCE UNIT, A MAGNETIC RESONANCE APPARATUS WITH THE MAGNETIC RESONANCE UNIT, AND A METHOD FOR DETERMINATION OF A MOVEMENT BY A PATIENT DURING A MAGNETIC RESONANCE EXAMINATION

Номер: US20140070807A1
Автор: Biber Stephan
Принадлежит:

A magnetic resonance unit with a housing unit and a patient accommodation area for the accommodation and/or holding of at least one part region of a patient is provided. The patient accommodation area is surrounded at least partially by the housing unit, a first and a second movement sensor unit for acquiring a first and a second item of movement information of a movement of the patient. The first movement sensor unit exhibits a first field of view for the acquisition of a first part region of the patient and/or of the patient accommodation area, and the second movement sensor unit exhibits a second field of view for the acquisition of a second part region of the patient and/or of the patient accommodation area, which is formed differently in relation to the first part region of the patient and/or of the patient accommodation area. 1. A magnetic resonance unit , comprising:a housing unit;a patient accommodation area for accommodation and/or holding of at least one part region of a patient for a magnetic resonance examination;a first movement sensor unit for acquiring a first item of movement information of a movement of the patient; anda second movement sensor unit for acquiring a second item of movement information of the movement of the patient,wherein the patient accommodation area is at least partially surrounded by the housing unit, the first movement sensor unit, and the second movement sensor unit,wherein the first movement sensor unit exhibits a first field of view for the acquisition of a first part region of the patient and/or of the patient accommodation area, andwherein the second movement sensor unit exhibits a second field of view for the acquisition of a second part region of the patient and/or of the patient accommodation area that is arranged differently to the first part region of the patient and/or of the patient accommodation area.2. The magnetic resonance unit as claimed in claim 1 , wherein the first and the second movement sensor units are ...

Подробнее
Номер записи: 91
13-03-2014 дата публикации

METHOD FOR ACQUIRING A MOVEMENT OF A PATIENT DURING A MEDICAL IMAGING EXAMINATION

Номер: US20140073904A1
Автор: Biber Stephan
Принадлежит:

A method for acquiring a movement of a patient during a medical imaging examination, in particular a magnetic resonance examination, by means of a medical imaging device, in particular a magnetic resonance device is provided. The method includes the following method steps: 1. A method for acquiring a movement of a patient during a medical imaging examination , by means of a medical imaging device , comprising:acquiring 3D image data by means of the medical imaging device prior to the medical imaging examination;calculating 3D position information for the patient on the basis of the 3D image data;acquiring movement data by means of a motion sensor unit during the medical imaging examination; anddetermining information regarding the movement of the patient,wherein the 3D position information for the patient and the movement data acquired by means of the motion sensor unit are included in the calculation.2. The method as claimed in claim 1 ,wherein concurrently with the acquisition of the 3D image data first movement data is acquired by means of the motion sensor unit prior to the medical imaging examination.3. The method as claimed in claim 2 ,wherein from the first movement data acquired prior to the medical imaging examination first information regarding the movement is ascertained which constitutes a start criterion for the medical imaging examination.4. The method as claimed in claim 3 ,wherein the start criterion for the medical imaging examination consists of the patient being motionless.5. The method as claimed in claim 1 ,wherein the movement data acquired during the medical imaging examination is acquired continuously for the duration of the medical imaging examination.6. The method as claimed in claim 1 ,wherein the movement data acquired during the medical imaging examination and information calculated therefrom regarding a movement are stored.7. The method as claimed in claim 1 ,wherein the movement data acquired during the medical imaging examination or ...

Подробнее
Номер записи: 92
13-03-2014 дата публикации

MAGNETIC RESONANCE IMAGE RECORDING UNIT AND A MAGNETIC RESONANCE DEVICE HAVING THE MAGNETIC RESONANCE IMAGE RECORDING UNIT

Номер: US20140073908A1
Автор: Biber Stephan
Принадлежит:

A magnetic resonance image recording unit for recording at least part of a patient during a magnetic resonance examination is presented. The magnetic resonance image recording unit has a first housing wall, a patient receiving area which is at least partially enclosed by the first housing wall, and a motion sensor unit for detecting a movement of the patient. The motion sensor unit has at least one motion sensor element which is arranged in a section of a side of the first housing wall facing away from the patient receiving area. 1. A magnetic resonance image recording unit for recording at least part of a patient during a magnetic resonance examination , comprising:a first housing wall;a patient receiving area that is at least partially enclosed by the first housing wall; anda motion sensor unit for detecting a movement of the patient,wherein the motion sensor unit comprises at least one motion sensor element that is arranged in a section of a side of the first housing wall facing away from the patient receiving area.2. The magnetic resonance image recording unit as claimed in claim 1 , wherein the first housing wall comprises at least one transparent subsection.3. The magnetic resonance image recording unit as claimed in claim 2 , wherein the at least one transparent subsection is transparent to a radiation emitted by the motion sensor unit and/or a radiation that is to be received by the motion sensor unit.4. The magnetic resonance image recording unit as claimed in claim 2 , wherein the at least one transparent subsection is at least partially encompassed by imaging optics of the motion sensor unit.5. The magnetic resonance image recording unit as claimed in claim 2 , wherein the at least one transparent subsection at least partially comprises a curved surface.6. The magnetic resonance image recording unit as claimed in claim 1 , wherein the first housing wall is at least partially formed from a transparent material and a nontransparent subsection of the first ...

Подробнее
Номер записи: 93
20-03-2014 дата публикации

Combined HF/Shim/Gradient Signal Routing

Номер: US20140077803A1
Автор: Biber Stephan, RENZ Wolfgang, Ruff Jan
Принадлежит:

A method and a magnetic resonance tomography (MRT) system are provided. The MRT system includes at least one cable. The MRT system is configured to transmit high frequency (HF) signals for at least one HF transmitting coil, and shim signals for at least one shim coil and/or gradient signals for at least one gradient coil in the at least one cable. 1. A method for transmitting signals in at least one cable in an imaging magnetic resonance tomography (MRT) system , the method comprising:transmitting high frequency (HF) signals for at least one HF transmitting coil of the imaging MRT system, and shim signals for at least one shim coil, gradient signals for at least one gradient coil, or the shim signals and the gradient signals in a cable.2. The method as claimed in claim 1 , wherein the transmitting comprises transmitting only the HF signals and the shim signals in the cable.3. The method as claimed in claim 1 , wherein the transmitting comprises transmitting only the HF signals and the gradient signals in the cable.4. The method as claimed in claim 1 , wherein the transmitting comprises transmitting the HF signals claim 1 , the shim signals claim 1 , and the gradient signals in the cable.5. The method as claimed in claim 1 , wherein transmitting in the cable comprises transmitting in a coaxial cable.6. The method as claimed in claim 1 , further comprising providing more than one cable to a local coil of the MRT system claim 1 ,wherein the transmitting comprises transmitting the HF signals and the shim signals, the gradient signals, or the shim signals and the gradient signals in the more than one cable.7. The method as claimed in claim 6 , wherein providing more than one cable to the local coil comprises providing more than one cable to a multi-channel coil.8. The method as claimed in claim 7 , wherein the at least one HF transmitting coil comprises a plurality of transmitting coils claim 7 , the at least one shim coil comprises a plurality of shim coils claim 7 , ...

Подробнее
Номер записи: 94
03-01-2019 дата публикации

INDUCTIVELY COUPLED MAGNETIC RESONANCE TRANSMITTING ANTENNA

Номер: US20190004127A1
Автор: Biber Stephan, Vester Markus
Принадлежит:

System and methods are provided for a passive transmitting antenna for a magnetic resonance tomography system and to a system including a passive transmitting antenna and magnetic resonance tomography system and a method for operation. The passive transmitting antenna includes a tuning apparatus with a tuning element. The tuning apparatus is configured to perform a tuning of the passive transmitting antenna as a function of a relative position of the passive transmitting antenna in a patient tunnel of the magnetic resonance tomography system. 1. A passive transmitting antenna for a magnetic resonance tomography system , the passive transmitting antenna comprising:a tuning apparatus comprising a tuning element configured to perform a tuning of the passive transmitting antenna as a function of a relative position of the passive transmitting antenna in a patient tunnel of the magnetic resonance tomography system.2. The passive transmitting antenna of claim 1 , wherein the tuning apparatus further comprises:a distance meter.3. The passive transmitting antenna of claim 1 , wherein the tuning element comprises a changeable capacitance.4. The passive transmitting antenna of claim 1 , wherein the tuning apparatus further comprises:a sensor configured to measure an induced radio-frequency current or an induced radio-frequency voltage in the passive transmitting antenna, wherein the tuning apparatus is configured to tune the passive transmitting antenna such that the radio-frequency current or the radio-frequency voltage induced in the passive transmitting antenna by an excitation field assumes a predetermined amplitude.5. The passive transmitting antenna of claim 1 , wherein the passive transmitting antenna further comprises:a plurality of antenna coils, each antenna coil of the plurality coils comprising a respective tuning element, wherein the tuning apparatus is configured to perform a tuning of the passive transmitting antenna as a function of a relative position of the ...

Подробнее
Номер записи: 95
14-01-2016 дата публикации

SHEATH CURRENT FILTER WITH INTEGRATED OPTICAL CABLE GUIDE

Номер: US20160011286A1
Автор: Biber Stephan
Принадлежит:

A sheath current for an imaging magnetic resonance tomography system is provided, wherein a coil element of the sheath current filter is embodied to surround a waveguide of the sheath current filter, a local coil connection, and a local coil. 1. A system comprising:a waveguide; anda sheath current filter comprising a coil element,wherein the coil element is configured to surround the waveguide.2. The system as claimed in claim 1 , wherein the waveguide is an optical waveguide claim 1 , a plastic optical waveguide claim 1 , a polymer fiber optical waveguide claim 1 , or a combination thereof.3. The system as claimed in claim 2 , wherein the optical waveguide is a glass fiber optical waveguide.4. The system as claimed in claim 1 , wherein the waveguide is electrically non- conductive claim 1 , is a waveguide for light claim 1 , or is electrically non-conductive and is a waveguide for light.5. The system as claimed in claim 1 , wherein the sheath current filter comprises a capacitive element.6. The system as claimed in claim 5 , wherein the capacitive element is connected in parallel or in series with the coil element.7. The system as claimed in claim 5 , wherein the capacitive element is inside claim 5 , outside claim 5 , or inside and outside on a sheath of the waveguide.8. The system as claimed in claim 1 , further comprising:a capacitive element connected electrically-conductively to the coil element of the sheath current filter, wherein the capacitive element is soldered or pressed on to the coil element.9. The system as claimed in claim 1 , further comprising:a capacitive element coupled inductively to the coil element of the sheath current filter.10. The system as claimed in claim 1 , wherein the coil element is integrated into a sheath of the waveguide claim 1 , is disposed outside on the surface of the sheath claim 1 , or is integrated into the sheath and disposed outside on the surface of the sheath.11. The system as claimed in claim 1 , wherein the coil ...

Подробнее
Номер записи: 96
09-01-2020 дата публикации

MAGNETIC RESONANCE APPARATUS AND GRADIENT MAGNETIC FIELD-DEPENDENT CONTROL THEREOF

Номер: US20200011954A1
Автор: Biber Stephan, Grodzki David, Hesels Katharina
Принадлежит: Siemens Healthcare GmbH

In an magnetic resonance imaging (MRI) system and a method for controlling a magnetic field gradient applied in the MRI system during an imaging sequence, a first gradient parameter representing a first maximum value of the applicable magnetic field gradients applied over time is determined in view heat generated by the applied magnetic field gradients. A second gradient parameter representing a second maximum value of the applicable magnetic field gradients applied over time is also determined in view heat generated by the applied magnetic field gradients, the second maximum value being different from the first maximum value. A current operating parameter of the MRI system is determined, and either the first gradient parameter or the second gradient parameter is selected for the imaging sequence, dependent on the determined current operating parameter. 1. A method for controlling a magnetic field gradient applied in a magnetic resonance imaging (MRI) system during an imaging sequence , said method comprising:in a computer, determining a first gradient parameter representing a first maximum value of the applicable magnetic field gradients applied over time in view heat generated by the applied magnetic field gradients;in said computer, also determining a second gradient parameter representing a second maximum value of the applicable magnetic field gradients applied over time in view heat generated by the applied magnetic field gradients, the second maximum value being different from the first maximum value;in said computer, determining a current operating parameter of the MRI system; andvia said computer, selecting one of the first gradient parameter and the second gradient parameter for the imaging sequence in dependence of the determined current operating parameter.2. The method according to claim 1 , comprising determining the first and second gradient parameters so as to be proportional to an electric power generated by a current needed to generate the magnetic ...

Подробнее
Номер записи: 97
21-01-2016 дата публикации

BODY-INSERTABLE DEVICE WITH AN MR COIL AND A SHIN COIL

Номер: US20160018490A1
Автор: Biber Stephan
Принадлежит: SIEMENS AKTIENGESELLSCHAFT

A medical device to be introduced into the body of a subject has at least one MR coil that can be introduced into the body at the same time and at least one shim coil that can be introduced into the body at the same time. The device can be formed as an endorectal probe, vaginal probe and transesophageal probe as well as an implant.

Подробнее
Номер записи: 98
22-01-2015 дата публикации

Use of a Plurality of TX Coils

Номер: US20150022208A1
Автор: Biber Stephan
Принадлежит:

At least two RF transmission coil arrangements are provided. Each of the at least two RF transmission coil arrangements includes at least one RF transmission antenna. The at least two RF transmission coil arrangements are actuatable by a transmission apparatus of the magnetic resonance imaging system for transmitting RF pulses. 1. A magnetic resonance imaging (MRI) system comprising:at least two radio frequency (RF) transmission coil arrangements, each RF transmission coil arrangement of the at least two RF transmission coil arrangements comprising at least one RF transmission antenna; anda transmission apparatus operable to actuate the at least two RF transmission coil arrangements for transmitting RF pulses.2. The MRI system of claim 1 , wherein the transmission apparatus is operable to actuate the at least two RF transmission coil arrangements alternately claim 1 , is operable to actuate a plurality of RF transmission coil arrangements of the at least two RF transmission coil arrangements together at a same time claim 1 , or is operable to actuate the at least two RF transmission coil arrangements alternately and is operable to actuate the plurality of RF transmission coil arrangements together at the same time for transmission purposes.3. The MRI system of claim 1 , wherein the at least two RF transmission coil arrangements are inductively coupled to one another.4. The MRI system of claim 1 , wherein the transmission apparatus is configured to actuate the at least two RF transmission coil arrangements for a different spatial TX irradiation claim 1 , for time-varying TX field profiles claim 1 , or for a combination thereof.5. The MRI system of claim 4 , wherein the transmission apparatus is configured to actuate the at least two RF transmission coil arrangements for different applications.6. The MRI system of claim 5 , wherein the transmission apparatus is configured to actuate the at least two RF transmission coil arrangements without modified position of a ...

Подробнее
Номер записи: 99
22-01-2015 дата публикации

Breast Coil with a Mechanical Height Adjustment

Номер: US20150025361A1
Автор: Biber Stephan
Принадлежит:

A local coil for a magnetic resonance imaging (MRI) system is a breast coil that includes at least one height adjustment apparatus. 1. A local coil for a magnetic resonance imaging (MRI) system , wherein:the local coil comprises a breast coil; andthe local coil comprises at least one height adjustment apparatus.2. The local coil of claim 1 , wherein the at least one height adjustment apparatus comprises height-adjustable feet.3. The local coil of claim 1 , wherein the at least one height adjustment apparatus comprises a plurality of adapters having identical or varying thicknesses claim 1 , and wherein at least one adapter of the plurality of adapters is configured for assembly under the breast coil.4. The local coil of claim 1 , wherein the at least one height adjustment apparatus comprises a first tray and a second tray claim 1 , wherein the first tray and the second tray are moveable with respect to one another and are configured for height adjustment.5. The local coil of claim 1 , wherein the at least one height adjustment apparatus comprises a latching apparatus configured for different heights.6. The local coil of claim 1 , wherein the at least one height adjustment apparatus comprises a plurality of wedges claim 1 , and wherein each wedge of the plurality of wedges is configured for height adjustment.7. The local coil of claim 1 , wherein the at least one height adjustment apparatus comprises a pneumatic apparatus configured for height adjustment.8. The local coil of claim 1 , wherein the local coil is configured for height-adjustment by an electromechanical apparatus.9. The local coil of claim 1 , wherein the at least one height adjustment apparatus is configured to adjust a height of the local coil; wherein the at least one height adjustment apparatus is configured to adjust a height of one or more breast cups of the local coil relative to a patient couch claim 1 , a bore claim 1 , or the patient couch and the bore; or wherein the at least one height ...

Подробнее
Номер записи: 100
22-01-2015 дата публикации

Local Transmission Coils and Transmission Coil Arrays for Spinal Column Imaging in an MRI Device

Номер: US20150025362A1
Автор: Biber Stephan, Fischer Hubertus, Greim Helmut
Принадлежит:

A spine coil for a magnetic resonance imaging device includes at least one transmission coil element configured for transmission. 1. A spine coil for a magnetic resonance imaging device , the spine coil comprising:at least one transmission coil element configured for transmission.2. The spine coil of claim 1 , wherein the spine coil comprises a plurality of transmission coil elements.3. The spine coil of claim 2 , further comprising a first housing claim 2 , wherein one or more of the plurality of transmission coil elements is provided within the first housing.4. The spine coil of claim 3 , further comprising a second housing claim 3 , wherein one or more of the plurality of transmission coil elements is provided in the second housing and outside the first housing.5. The spine coil of claim 2 , wherein each transmission coil element of the plurality of transmission coil elements is (a) arranged in succession along a longitudinal direction of a bore of a magnetic resonance imaging device claim 2 , (b) arranged along a longitudinal direction of a patient couch claim 2 , the spine coil being arranged on or in the patient couch claim 2 , or (c) arranged in succession along the longitudinal direction of the bore and along the longitudinal direction of the patient couch.6. The spine coil of claim 2 , wherein each transmission coil element of the plurality of transmission coil elements is arranged in succession along one direction claim 2 , and wherein each transmission coil element of the plurality of transmission coil elements is (a) individually actuatable for transmission claim 2 , (b) configured to be connected to claim 2 , or connected to claim 2 , a transmission apparatus by one or a plurality of dedicated transmission cables claim 2 , or (c) individually actuatable for transmission and configured to be connected to claim 2 , or connected to claim 2 , the transmission apparatus by the one or the plurality of dedicated transmission cables.7. The spine coil of claim 2 ...

Подробнее
Номер записи: 101
28-01-2021 дата публикации

METHOD AND DEVICE FOR TAKING ACCOUNT OF THE MAGNETIC RESONANCE SIGNAL DURING INTERFERENCE SUPPRESSION

Номер: US20210025954A1
Автор: Biber Stephan, Grodzki David
Принадлежит:

A method for suppressing interference signals during an image acquisition with a magnetic resonance tomography scanner that has an antenna and an interference signal sensor is provided. The magnetic resonance tomography scanner receives a reference interference signal via the interference signal sensor, receives a magnetic resonance signal via the antenna, and reduces a portion of an interference signal in the magnetic resonance signal as a function of the reference interference signal. During the reduction of the interference signal, the method takes into account the fact that the reference interference signal also has a signal portion of the magnetic resonance signal. 1. A method for suppressing interference signals in a magnetic resonance recording with a magnetic resonance tomography scanner , wherein the magnetic resonance tomography scanner includes a controller , a receiver , an antenna , and an interference signal sensor , the method comprising:receiving a reference interference signal by the receiver via the interference signal sensor;receiving a magnetic resonance signal of an examination object by the receiver via the antenna;reducing a portion of the interference signal in the magnetic resonance signal by the receiver as a function of the reference interference signal,wherein the reducing of the portion of the interference signal takes place as a function of a portion of the magnetic resonance signal in the reference interference signal received by the interference signal sensor.2. The method of claim 1 , further comprising:populating a k-space with scan data of an image acquisition by a magnetic resonance scan; andinterpolating a portion of the magnetic resonance signal in the reference interference signal onto the scan data in the k-space with the aid of gridding.3. The method of in claim 1 , further comprising:determining quantitative information about the examination object by a magnetic resonance scan; anddetermining a portion of the magnetic ...

Подробнее
Номер записи: 102
17-02-2022 дата публикации

MRI SCANNER WITH ACTIVE INTERFERENCE SUPPRESSION AND INTERFERENCE SUPPRESSION METHOD FOR AN MRI SCANNER

Номер: US20220050158A1
Автор: Biber Stephan, Grodzki David, Nichols Ian Edward, Sadler David James, Vester Markus
Принадлежит:

An MRI scanner and a method for operation of the MRI scanner are provided. The MRI scanner has a first receiving antenna for receiving a magnetic resonance signal from a patient in a patient tunnel, a second receiving antenna for receiving a signal having the Larmor frequency of the magnetic resonance signal, and a receiver. The second receiving antenna is located outside of the patient tunnel or near an opening thereof. The receiver has a signal connection to the first receiving antenna and the second receiving antenna and is configured to suppress an interference signal by the second receiving antenna in the magnetic resonance signal received by the first receiving antenna. 1. A magnetic resonance imaging (MRI) scanner comprising:a patient tunnel;a first receiving antenna operable to receive a magnetic resonance signal from a patient in the patient tunnel;a second receiving antenna operable to receive a signal having the Larmor frequency of the magnetic resonance signal; anda receiver,wherein the second receiving antenna is arranged outside or in a vicinity of an opening of the patient tunnel,wherein the receiver is connected to the first receiving antenna and the second receiving antenna for signaling, and the receiver is configured to suppress an interference signal received with the second receiving antenna in a magnetic resonance signal received by the first receiving antenna.2. The MRI scanner of claim 1 , wherein the receiver is configured to suppress a wideband interference signal received with the second receiving antenna outside a frequency range of the magnetic resonance signal in the magnetic resonance signal received by the first receiving antenna.3. The MRI scanner of claim 1 , wherein the receiver has an autocorrelation device claim 1 , and the autocorrelation device is configured to determine a portion of the signal received by the second receiving antenna in the magnetic resonance signal received by the first receiving antenna.4. The MRI scanner of ...

Подробнее
Номер записи: 103
12-02-2015 дата публикации

MR Marker for Magnetic Resonance Imaging

Номер: US20150045655A1
Автор: Biber Stephan
Принадлежит:

An MR marker for magnetic resonance imaging includes: (1) a closed volume containing a marker medium, (2) a first marker coil surrounding the volume for detecting an MR signal from the marker medium, (3) an RF shield which surrounds at least the volume and the first marker coil and screens against external RF fields, (4) a second marker coil, arranged outside the RF shield, for inductive and/or capacitive coupling to a magnetic field, and/or for emitting the MR signal detected by the first marker coil, (5) a first electrical interface for controllable electrical connection of the first marker coil to the magnetic resonance imaging scanner, (6) a second electrical interface for controllable coupling of the second marker coil and first marker coil, and (7) an electrical controller with which the first interface and/or the second interface may be controlled. 1. An MR marker for magnetic resonance imaging , the MR marker comprising:a closed volume containing a marker medium;a first marker coil surrounding the closed volume for detecting an MR signal from the marker medium;an RF shield that surrounds at least the closed volume and the first marker coil and screens against external RF fields;a second marker coil, arranged outside the RF shield, for inductive, capacitive, or inductive and capacitive coupling to a magnetic field, and/or for emitting the MR signal detected by the first marker coil;a first electrical interface for controllable electrical connection of the first marker coil to a magnetic resonance imaging scanner;a second electrical interface for controllable coupling of the second marker coil and first marker coil; andan electrical controller configured to control the first electrical interface, the second electrical interface, or the first and second electrical interfaces.2. The MR marker as claimed in claim 1 , wherein the electrical controller distinguishes two operating states of the MR marker: (1) a transmit mode and (2) a receive mode claim 1 , ...

Подробнее
Номер записи: 104
24-02-2022 дата публикации

POWER SUPPLY FACILITY FOR A MAGNETIC RESONANCE FACILITY, MAGNETIC RESONANCE SYSTEM, AND METHOD FOR OPERATING A POWER SUPPLY FACILITY

Номер: US20220060046A1
Автор: Biber Stephan, Grübel Sören
Принадлежит:

A power supply facility for supplying a magnetic resonance facility with electrical power includes a control facility, a network connection to a power network, and an electrical energy store, such as a battery. The network connection is configured for an installed power level that is lower than a maximum power level that may be demanded by the magnetic resonance facility. The control facility is configured, in the event that a power demand of the magnetic resonance facility exceeds the installed power, to provide the power from the network connection and the energy store. 1. A power supply facility for supplying a magnetic resonance facility with electrical power , the power supply facility comprising:a control facility; anda network connection to a power network and an electrical energy store,wherein the network connection is configured for an installed power level that is lower than a maximum power level that is demandable by the magnetic resonance facility, andwherein the control facility is configured, in the event that a power demand of the magnetic resonance facility exceeds the installed power, to provide the power from the network connection and the energy store.2. The power supply facility of claim 1 , wherein the electrical energy store is a battery.3. The power supply facility of claim 1 , wherein the network connection and the electrical energy store are part of an uninterruptible power supply facility that is connected via an electric connection to the magnetic resonance facility.4. The power supply facility of claim 1 , wherein the installed power of the network connection is 50% to 90 of the maximum power demandable by the magnetic resonance facility claim 1 , the storage capacity of the energy store is at least 5 kWh claim 1 , the storage capacity of the energy store is selected to maintain at least an operational state of the magnetic resonance facility for at least a specified time period claim 1 , the installed power of the network connection is ...

Подробнее
Номер записи: 105
26-02-2015 дата публикации

Patient-Adaptive B0 Homogenization of MR Systems Using Different Types of Shim Coils

Номер: US20150054510A1
Автор: Biber Stephan, Ladebeck Ralf
Принадлежит:

The embodiments relate to methods and to magnetic resonance tomography systems having a shim system, where the shim system includes at least one global shim coil in an area surrounding the bore of the magnetic resonance tomography system, and where the shim system includes a local shim coil in a local coil of the magnetic resonance tomography system with a shim controller, where the shim controller embodied to define shim currents for the global shim coil and for the local shim coil. 1. A magnetic resonance tomography (MRT) system comprising: at least one global shim coil in an area surrounding a bore of the magnetic resonance tomography system;', 'at least one local shim coil in a local coil of the magnetic resonance tomography system; and', 'a shim controller configured to determine global shim currents for the global shim coil and local shim currents for the local shim coil., 'a shim system comprising2. The magnetic resonance tomography system as claimed in claim 1 , wherein the shim system comprises a plurality of global shim coils in the area surrounding the bore claim 1 , a plurality of local shim coils in the local coil claim 1 , or a plurality of global shim coils in an area surrounding the bore and a plurality of local shim coils in the local coil.3. The magnetic resonance tomography system in claim 1 , further comprising:a global shim coil memory comprising global shim coil data relating to shim characteristics of the at least one global shim coil, field distribution data relating to a spatial field distribution of a shim field, or a combination thereof; and/ora local shim coil memory comprising local shim coil data relating to shim characteristics of the at least one local shim coil, field distribution data relating to a spatial field distribution of a shim field created with the at least one local shim coil, or a combination thereof,wherein the shim controller is configured to determine the global shim currents and the local shim currents using the ...

Подробнее
Номер записи: 106
05-03-2015 дата публикации

Determining a Respiratory Rate of a Living Being

Номер: US20150065857A1
Автор: Michael Wiehl, Stephan Biber
Принадлежит: SIEMENS AG

A method for determining a respiratory rate of a living being includes emitting a radio signal using a radio transmitter arranged on the living being. The emitted radio signal is acquired, and the respiratory rate is determined based on the acquired radio signal.

Подробнее
Номер записи: 107
12-03-2015 дата публикации

Compatible Magnetic Resonance Receiver

Номер: US20150070014A1
Автор: Biber Stephan, Bollenbeck Jan, Vester Markus, Wang Jianmin
Принадлежит:

A method and an apparatus for a magnetic resonance imaging system are provided. A type of further processing of signals transmitted by a local coil to a magnetic resonance imaging (MRI) system is determined in dependence on information received in or from the local coil about a local-coil type of the local coil. 1. An apparatus for a magnetic resonance imaging system , the apparatus comprising:a processor configured to determine, in dependence on information received in or from a local coil about a local-coil type of the local coil, in the magnetic resonance imaging system, a type of further processing of signals transmitted by the local coil to the magnetic resonance imaging system.2. The apparatus of claim 1 , wherein the apparatus is a magnetic resonance imaging system reception signal further processing device.3. The apparatus of claim 1 , wherein the processor is further configured to determine claim 1 , in dependence on the information received in or from the local coil about the local-coil type of the local coil claim 1 , which relates to a signal type of RF reception signals transmitted by the local coil to the magnetic resonance imaging system claim 1 , a type of further processing of signals received from the local coil.4. The apparatus of claim 1 , wherein the processor is further configured to determine claim 1 , in dependence on the information received in or from the local coil about the local-coil type of the local coil claim 1 , with respect to the transmission of signals of the local coil to the magnetic resonance imaging system either at a Larmor frequency of the magnetic resonance imaging system or at at least one intermediate frequency deviating from the Larmor frequency claim 1 , a type of further processing of signals received from the local coil.5. The apparatus of claim 1 , wherein the processor is further configured to determine claim 1 , in dependence on the information received in or from the local coil about the local-coil type of the ...

Подробнее
Номер записи: 108
17-03-2022 дата публикации

Method and apparatus for suppressing interference emissions in magnetic resonance systems

Номер: US20220082642A1
Автор: Jürgen NISTLER, Markus Vester, Stephan Biber
Принадлежит: Siemens Healthcare GmbH

A magnetic resonance tomography unit and a method for operating the magnetic resonance tomography unit are provided. The magnetic resonance tomography unit has a transmission interference suppression device with a transmission interference suppression control system, a sensor, and a transmission interference suppression antenna. The transmission interference suppression device is configured to acquire, with the sensor, an excitation signal of the transmitter, and determine, with the transmission interference suppression control system, a transmission interference suppression signal dependent upon the acquired excitation signal of the transmitter. The transmission interference suppression device is configured to transmit, via the transmission interference suppression antenna, the transmission interference suppression signal, so that at a predetermined location outside the magnetic resonance tomography unit, the excitation signal emitted by the transmitter via the transmitter antenna is attenuated.

Подробнее
Номер записи: 109
27-02-2020 дата публикации

OPERATING AN MRI APPARATUS

Номер: US20200064425A1
Автор: Bampton Adrian, Biber Stephan, de Oliveira Andre, Johnstone Paul Adam, Model Volker, Nistler Jürgen, Potthast Andreas, Vester Markus
Принадлежит:

A method of operating a magnetic resonance imaging (MRI) apparatus includes exciting a body coil of the MRI apparatus to emit a radio-frequency signal, determining a center frequency of a resonance curve of the body coil, and calculating a magnet target frequency based on the determined center frequency. A magnet is ramped to the magnet target frequency. 1. A method of operating a magnetic resonance imaging (MRI) apparatus , the method comprising:exciting a body coil of the MRI apparatus, such that a radio-frequency signal is emitted;detecting a reflected radio-frequency signal;determining a center frequency of a resonance curve of the body coil from the reflected radio-frequency signal;identifying a magnet target frequency based on the determined center frequency; andramping a magnet to the magnet target frequency.2. The method of claim 1 , further comprising storing the center frequency in a storage device of the MRI apparatus.3. The method of claim 1 , wherein determining the center frequency comprises averaging the resonance curve of the reflected radio-frequency signal.4. The method of claim 1 , wherein determining the center frequency comprises measuring transmissivity between the body coil and a further coil of the MRI apparatus.5. The method of claim 1 , wherein ramping the magnet comprises ramping the magnet to a frequency comprising a sum of the magnet target frequency and an offset claim 1 , andwherein the offset is determined based on a ramping procedure.6. The method of claim 1 , wherein determining the center frequency of the resonance curve of the body coil comprises determining the center frequency during manufacture of the MRI apparatus claim 1 , at any time during a lifetime of the MRI apparatus claim 1 , or during manufacture of the MRI apparatus and at any time during the lifetime of the MRI apparatus.7. The method of claim 1 , wherein the target frequency of the magnet is determined in the absence of a main magnetic field.8. A magnetic resonance ...

Подробнее
Номер записи: 110
17-03-2016 дата публикации

Flexible Signal Multiplexer for MRI Receiving Systems

Номер: US20160077174A1
Автор: Biber Stephan, Bollenbeck Jan
Принадлежит:

The embodiments relate to a method and a receiving system for an imaging magnetic resonance tomography system. The receiving system includes at least one multiplexer entity for a plurality of receive signals, which respectively come from an antenna of a local coil and may be switched to an analog-digital converter, wherein sampling rates (e.g., 20 MS/s per Ch, 40 MS/s per Ch, 80 MS/s per Ch) of an analog-digital converter for the sampling of a receive signal may be changed. 1. A receiving system for an imaging magnetic resonance tomography system , the receiving system comprising:at least one analog-digital converter; andat least one multiplexer entity for receive signals, wherein the receive signals come from respective antennas of a local coil, and wherein the receive signals are configured to be switched to the at least one analog-digital converter,wherein sampling rates of the analog-digital converter for sampling at least one receive signal are configured to be changed in so far as a sampling rate of the at least one receive signal is configured to be varied in the context of an analog-digital conversion by changing a number of receive signals, a number of antennas, or the number of receive signals and the number of antennas present at or multiplexed by at least one multiplexer connected upstream of the at least one analog-digital converter.2. The receiving system as claimed in claim 1 , wherein the sampling rates are signal-specific sampling rates.3. The receiving system as claimed in claim 1 , wherein the sampling rate of the least one receive signal is configured to be changed by the at least one analog-digital converter.4. The receiving system as claimed in claim 1 , wherein the sampling rate of the at least one analog-digital converter is configured to be changed as a function of a height claim 1 , dynamic range claim 1 , or the height and the dynamic range of expected signal levels of the receive signals.5. The receiving system as claimed in claim 1 , ...

Подробнее
Номер записи: 111
07-03-2019 дата публикации

METHOD AND MAGNETIC RESONANCE APPARATUS FOR MONITORING A COOLING SYSTEM OF THE MAGNETIC RESONANCE APPARATUS

Номер: US20190072624A1
Автор: Biber Stephan
Принадлежит: Siemens Healthcare GmbH

In a method and magnetic resonance apparatus for monitoring functioning of a cooling system of the apparatus, at least some apparatus components, that are to be cooled by the cooling system, have respective temperature sensors in thermal communication therewith. A start temperature of at least one of the components is determined by at least one of the sensors, and a computer determines, from the start temperature, at least one comparison variable that describes a reference temperature change due to power input to the respective component. The at least one temperature sensor provides the computer with a measured variable that describes actually occurring temperature change due to the power input. The computer compares the measured variable with the comparison variable and determines whether the comparison result fulfills an action criterion and, if so, the computer initiates implementation of an action associated with the action criterion. 1. A method for monitoring functioning of a cooling system of a magnetic resonance apparatus comprising a plurality of components that are cooled by the cooling system , and a plurality of temperature sensors in thermal communication with at least some of said components , said method comprising:with at least one of said temperature sensors associated with at least one of said components determining a start temperature of said at least one of said components;providing said start temperature to a computer, selected from the group consisting of a control computer of the magnetic resonance apparatus and a processor that is external to the magnetic resonance apparatus, and in said computer, determining, from said start temperature, at least one comparison variable that describes a reference temperature change due to a power input to said at least one of said components;with said at least one of said temperature sensors, measuring a measured variable that describes a temperature change that actually occurs due to said power input to ...

Подробнее
Номер записи: 112
18-03-2021 дата публикации

RECEIVING USEFUL SIGNALS IN THE MAGNETIC RESONANCE FREQUENCY BAND

Номер: US20210080526A1
Автор: Biber Stephan
Принадлежит:

The disclosure relates to a method for determining an item of evaluation information from a reception signal received by a magnetic resonance apparatus, a computer program product for carrying out such a method and a magnetic resonance apparatus. The method provides that a useful signal having a first frequency band is generated. The magnetic resonance apparatus is configured to generate a magnetic resonance signal in a second frequency band. The first frequency band lies at least partially, (e.g., completely), within the second frequency band. A reception signal is received by a receiving unit of the magnetic resonance apparatus. From the reception signal, an item of evaluation information is determined which characterizes the useful signal. 1. A method for determining an item of evaluation information from a reception signal received by a magnetic resonance apparatus , the method comprising:generating a useful signal in a first frequency band, wherein the magnetic resonance apparatus is configured to generate a magnetic resonance signal in a second frequency band, and wherein the first frequency band lies at least partially within the second frequency band;receiving a reception signal by a receiving unit of the magnetic resonance apparatus; anddetermining an item of evaluation information characterizing the useful signal from the reception signal.2. The method of claim 1 , wherein the first frequency band lies completely within the second frequency band.3. The method of claim 1 , further comprising:generating a magnetic resonance signal in the first frequency band,wherein the reception signal has an overlaying of the magnetic resonance signal in the first frequency band with the useful signal.4. The method of claim 3 , wherein the magnetic resonance signal is reconstructed from the reception signal based on the evaluation information.5. The method of claim 4 , wherein at least one magnetic resonance image is calculated from the reconstructed magnetic resonance ...

Подробнее
Номер записи: 113
12-06-2014 дата публикации

Dynamic Adaptation of a Degree of Signal Compression for MRT Image Processing

Номер: US20140161336A1
Автор: Biber Stephan, Kannengiesser Stephan
Принадлежит:

An apparatus and a method for generating an image from N reception signal data sets of signals received by a plurality of coils of a magnetic resonance tomography appliance from a region of a body to be examined using an image processing computer are provided. The apparatus includes a degree-of-compression determining device. A ratio N/M of the number N of N reception signal data sets generated from the signals received by the plurality of coils to a smaller number M of mode data sets is defined taking account of a plurality of parameters. The plurality of parameters at least also represent system resources of the image processing computer. Using a compression computer, the N reception signal data sets are compressed into M mode data sets. After this, the M mode data sets are used by the image processing computer for generating the image of the region of the body. 1. A method for generating an image with N reception signal data sets generated based on signals received from a plurality of coils of a magnetic resonance tomography appliance from a region of a body to be examined using an image processing computer , the method comprising:defining, using a degree-of-compression determining device, a ratio N/M of the number N of the N reception signal data sets generated from the signals received by the plurality of coils to a smaller number M of mode data sets taking account of a plurality of parameters, the plurality of parameters at least also representing system resources of the image processing computer;compressing, using a compression computer, the N reception signal data sets into the M mode data sets; andgenerating, using the image processing computer, an image of the region of the body using the M mode data sets.2. The method of claim 1 , wherein a parameter of the plurality of parameters comprises a memory of the image processing computer that is available for an image reconstruction.3. The method of claim 1 , wherein a parameter of the plurality of parameters ...

Подробнее
Номер записи: 114
22-03-2018 дата публикации

REDUNDANT COOLING SYSTEM FOR A MAGNETIC RESONANCE TOMOGRAPHY SYSTEM

Номер: US20180081012A1
Автор: Biber Stephan
Принадлежит:

A cooling system for a magnetic resonance tomography system is provided. The cooling system includes a first coolant circuit with a first coolant pump and a first heat exchanger in thermal contact with an object to be cooled. The first cooling circuit further includes a switchover apparatus that is configured to adjust a heat flow from the first coolant circuit optionally to a first heat sink and/or a second heat sink. In such cases the second heat sink is a second heat exchanger that is fluidically connected to an emergency cooling system. 1. A cooling system for a magnetic resonance tomography system , the cooling system comprising:a first coolant circuit including a first coolant pump;a first heat exchanger in thermal contact with an object to be cooled;a second heat exchanger; anda switchover apparatus configured to adjust a heat flow from the first coolant circuit to a first heat sink, a second heat sink, or the first heat sink and the second heat sink,wherein the second heat sink, which is of the second heat exchanger, is fluidically connected to an emergency cooling system.2. The cooling system of claim 1 , wherein the switchover apparatus includes an actuator operable to change a flow rate of an emergency coolant from the emergency cooling system through the second heat exchanger.3. The cooling system of claim 1 , wherein the second heat exchanger is part of the first coolant circuit.4. The cooling system of claim 1 , wherein the first cooling circuit further includes a multi-way valve claim 1 , and the second heat exchanger is includable in the first coolant circuit by the multi-way valve.5. The cooling system of claim 1 , further comprising a second cooling circuit claim 1 , the second cooling circuit being thermally coupled to the first cooling circuit and including the first heat sink claim 1 ,wherein the second heat exchanger is part of the second coolant circuit.6. The cooling system of claim 5 , wherein the second cooling circuit further includes a ...

Подробнее
Номер записи: 115
31-03-2016 дата публикации

SHIM COIL DEVICE AND A MAGNETIC RESONANCE COIL SYSTEM HAVING A SHIM COIL DEVICE

Номер: US20160089029A1
Автор: Biber Stephan, Ladebeck Ralf, Lee Kuan Jin, Martius Sebastian, Weiland Elisabeth
Принадлежит: SIEMENS AKTIENGESELLSCHAFT

A shim coil device for compensating for basic magnetic field inhomogeneities during medical magnetic resonance imaging of a breast of a patient, said shim coil has a housing with a contact surface that configures to bear against a patient, and at least one shim coil element having a shim coil axis. The shim coil is arranged on the patient such that the at least one shim coil axis has an angle of inclination α to the contact surface and/or to a patient surface, where α is ≧45° and α is ≦135°. 1. A shim coil device comprising:a housing having a contact surface adapted to bear against a patient surface of a patient adjacent to a breast of the patient;at least one shim coil element in said housing, configured to compensate field inhomogeneities in a basic magnetic field during a magnetic resonance imaging procedure of the breast; andsaid shim coil element having a shim coil axis that is oriented with an angle of inclination α relative to at least one of said contact surface and said patient surface, with 45°≦α≦135°.2. A shim coil device as claimed in wherein α is substantially equal to 90°.3. A shim coil device as claimed in wherein claim 1 , when said contact surface bears against said patient surface claim 1 , said shim coil axis has an angle of inclination β with respect to a field direction of said basic magnetic field claim 1 , with 45°≦β≦135°.4. A shim coil device as claimed in wherein β is substantially equal to 90°.5. A shim coil device as claimed in wherein said patient has a patient region that has a disruptive effect on homogeneity of said basic magnetic field claim 1 , and wherein said housing is configured to place said shim coil element relative to said patient region so that said patient region is covered to a maximum of 50%.6. A shim coil device as claimed in wherein said shim coil element has a shape selected from the group consisting of a circular shape claim 1 , an oval shape claim 1 , a rectangular shape claim 1 , a square shape claim 1 , and a ...

Подробнее
Номер записи: 116
25-03-2021 дата публикации

IDENTIFYING DEFECTIVE DETUNING CIRCUITS IN A MAGNETIC RESONANCE TOMOGRAPHY UNIT

Номер: US20210088608A1
Автор: Biber Stephan
Принадлежит:

A method for checking a detuning facility of an antenna coil of a magnetic resonance tomography unit, and a magnetic resonance tomography unit for carrying out the method are provided. In the method, a detuning facility of the antenna coil is activated. A first receive signal and a second receive signal are received. The first receive signal and the second receive signal are compared, and a warning signal is output depending on a result of the comparison. 1. A method for checking a detuning facility of an antenna coil of a magnetic resonance tomography unit , the method comprising:activating the detuning facility of the antenna coil;receiving a first receive signal with a receiver;receiving a second receive signal with the receiver;comparing, by a test controller, the first receive signal with the second receive signal; andoutputting a warning signal when a result of the comparison does not match a predetermined relation for the first received signal to the second received signal.2. The method of claim 1 , further comprising deactivating the detuning facility claim 1 , wherein receiving the second receive signal takes place with the detuning facility switched off claim 1 , andwherein comparing the first receive signal with the second receive signal comprises comparing a noise level of the first receive signal with a noise level of the second receive signal.3. The method of claim 2 , further comprising emitting claim 2 , by a transmitter of the magnetic resonance tomography unit claim 2 , a signal during the receiving of the first receive signal and the receiving of the second receive signal claim 2 ,wherein the signal is configured not to override the receiver.4. The method of claim 3 , wherein the transmitter is provided for generating excitation pulses of the magnetic resonance tomography unit and has a switchable attenuating facility between signal generation and a power output stage claim 3 , the switchable attenuating facility being configured to damp an input ...

Подробнее
Номер записи: 117
08-04-2021 дата публикации

LINE WITH SENSOR FOR DETECTING LINE-CONDUCTED INTERFERENCE IN A MAGNETIC RESONANCE TOMOGRAPHY APPARATUS

Номер: US20210103018A1
Автор: Biber Stephan, Vester Markus
Принадлежит:

A line for an electrical connection in a magnetic resonance tomography apparatus and a magnetic resonance tomography apparatus with a corresponding line are provided. The line includes an electrical interference conductor that may pick up an electromagnetic interference signal from an environment and/or irradiate the electromagnetic interference signal into the environment. The line also includes a sensor that is electrically and/or magnetically coupled to the interference line. 1. A line for an electrical connection in a magnetic resonance tomography apparatus with a connector to the magnetic resonance tomography apparatus , the line comprising:a conductor configured to pick up an electromagnetic interference signal from an environment, irradiate the electromagnetic interference signal into the environment, or a combination thereof;a sensor that is electrically, magnetically, or electrically and magnetically coupled to the conductor; anda signal connection configured to provide the electromagnetic interference signal picked up by the sensor at the connector to the magnetic resonance tomography apparatus for processing.2. The line of claim 1 , wherein the sensor comprises a coil configured for inductive coupling to the conductor.3. The line of claim 2 , wherein the conductor passes through an area enclosed by the coil.4. The line of claim 3 , wherein the coil is a toroidal coil that encloses the conductor.5. The line of claim 1 , wherein the sensor comprises a capacitive coupling element configured for coupling to the conductor.6. The line of claim 1 , wherein the sensor comprises a directional coupler.7. The line of claim 1 , wherein the sensor resonates at a Larmor frequency of the magnetic resonance tomography apparatus.8. The line of claim 1 , wherein the sensor is protected against an excitation pulse of the magnetic resonance tomography apparatus.9. A magnetic resonance tomography apparatus comprising: a conductor configured to pick up an electromagnetic ...

Подробнее
Номер записи: 118
29-04-2021 дата публикации

METHOD AND SYSTEM FOR MONITORING A MOTION OF A SUBJECT, AND CORRESPONDING COMPUTER PROGRAM PRODUCT

Номер: US20210121131A1
Автор: Biber Stephan
Принадлежит:

The disclosure relates to a method for monitoring a motion of a subject, as well as to a corresponding system and computer program product. As part of the method, a monitoring signal is emitted towards a corresponding receiver. The motion of the subject is then detected based on a change in the received monitoring signal. Therein, the monitoring signal is emitted using a spread-spectrum technique and/or using an M-to-N and multi-antenna emitter-receiver system with a set of M transmitting antennas and a set of N receiving antennas. 1. A method for monitoring a motion of a subject , the method comprising:emitting a monitoring signal towards a corresponding receiver; anddetecting the motion of the subject based on a change in the monitoring signal,wherein the monitoring signal is emitted: (a) using a spread-spectrum technique, (b) using an M-to-N multi-antenna emitter-receiver system with a set of M transmitting antennas and a set of N receiving antennas, or a combination thereof.2. The method of claim 1 , wherein claim 1 , as a reference for detecting the change in the monitoring signal claim 1 , a phase and an amplitude of the emitted monitoring signal is determined by: (a) the emitted monitoring signal carrying a predetermined digital signal and a calibration prior to emitting the monitoring signal of an analog emitter used for emitting the monitoring signal claim 1 , (b) coupling out a part of the monitoring signal to be emitted at the emitter and providing the part directly to a signal processing unit configured for detecting the change in the monitoring signal claim 1 , or a combination thereof.3. The method of claim 1 , wherein claim 1 , when the monitoring signal is emitted using the spread-spectrum technique claim 1 , the monitoring signal is generated through modulation with a predetermined pseudo-random spreading code.4. The method of claim 1 , wherein the motion monitoring is combined with a magnetic resonance imaging of the subject claim 1 , andwherein a ...

Подробнее
Номер записи: 119
02-04-2020 дата публикации

MAGNETIC RESONANCE TOMOGRAPHY SCANNER, SYSTEM, AND METHOD FOR PREVENTING CROSSTALK INTERFERENCE

Номер: US20200100733A1
Автор: Biber Stephan, Grodzki David
Принадлежит:

The disclosure relates to a magnetic resonance tomography scanner, a system including two magnetic resonance tomography scanners, and a method for operation thereof which reduces mutual interference between the magnetic resonance tomography scanners. A first magnetic resonance tomography scanner has a control unit for controlling the image acquisition and an interface connected to the control unit for signal communication purposes. The control unit is configured for synchronizing an image acquisition as a function of a signal received via the interface from a second magnetic resonance tomography scanner. 1. A magnetic resonance tomography scanner comprising:a control unit for controlling an image acquisition; andan interface connected to the control unit for signal communication,wherein the control unit is configured for synchronizing the image acquisition as a function of a signal received via the interface from a second magnetic resonance tomography scanner.2. The magnetic resonance tomography scanner of claim 1 , wherein the interface is configured for exchanging data claim 1 , andwherein the control unit is configured for synchronizing the image acquisition with a second magnetic resonance tomography scanner by an information exchange via the interface.3. The magnetic resonance tomography scanner of claim 1 , wherein the interface is a receiver claim 1 , andwherein the magnetic resonance tomography scanner is configured for detecting an excitation pulse of the second magnetic resonance tomography scanner outside of an image acquisition and for performing the image acquisition as a function of the detected excitation pulse.4. A magnetic resonance tomography scanner comprising:a control unit for controlling the image acquisition; andan interface connected to the control unit for signal communication,wherein the control unit is configured for sending a signal containing information about an upcoming image acquisition to a second magnetic resonance tomography ...

Подробнее
Номер записи: 120
11-04-2019 дата публикации

METHODS FOR ADJUSTING A MAGNETIC FIELD OF A MAGNETIC RESONANCE TOMOGRAPHY DEVICE, MAGNETIC POWER SUPPLIES, AND MAGNETIC RESONANCE TOMOGRAPHY DEVICES

Номер: US20190107591A1
Автор: ALEY Nicholas, Biber Stephan
Принадлежит:

A method for adjusting a magnetic field of a magnetic resonance tomography (MRT)-device having a magnet includes: transferring the magnet from an operating state to a non-operating state in a ramp-down mode; subsequently transferring the magnet from the non-operating state to the operating state in a ramp-up mode; observing a reference parameter different from the magnetic field; setting a target value for the reference parameter; comparing the observed reference parameter to the target value; and finishing the ramp-up mode when the reference parameter reaches the target value. 1. A method for adjusting a magnetic field of a magnetic resonance tomography (MRT)-device having a magnet , the method comprising:transferring the magnet from an operating state to a non-operating state in a ramp-down mode;subsequently transferring the magnet from the non-operating state to the operating state in a ramp-up mode;observing a reference parameter different from the magnetic field;setting a target value for the reference parameter;comparing the observed reference parameter to the target value; andfinishing the ramp-up mode when the reference parameter reaches the target value.2. The method of claim 1 , wherein the reference parameter is a current.3. The method of claim 2 , wherein the current is for realizing the magnetic field of the magnet.4. The method of claim 2 , wherein for setting the target value the current is calibrated during a previous ramp-up mode.5. The method of claim 4 , wherein the previous ramp-up mode is the preceding ramp-up mode.6. The method of claim 2 , wherein claim 2 , in the setting of the target value claim 2 , the current is calibrated during a previous ramp-down mode.7. The method of claim 6 , wherein the previous ramp-down mode is the preceding ramp-down mode.8. The method of claim 6 , wherein claim 6 , in the setting of the target value claim 6 , the current is observed during an initiation phase of the ramp-down mode.9. The method of claim 2 , ...

Подробнее
Номер записи: 121
13-05-2021 дата публикации

MAGNETIC RESONANCE TOMOGRAPHY SCANNER AND METHOD FOR TESTING

Номер: US20210137405A1
Автор: Biber Stephan
Принадлежит:

A magnetic resonance tomography scanner and a method for testing the magnetic resonance tomography scanner are provided. The magnetic resonance tomography scanner has a transmitter that is configured to transmit two-tone signals at different levels and to acquire intermodulation products of the two-tone signal with the receiver. A status of a receive path is inferred via a behavior of odd-order intermodulation products. 1. A magnetic resonance tomography scanner comprising:a receiver; anda transmitter, wherein the transmitter is configured to generate and output a first two-tone signal with a first frequency, a second frequency, and a level,wherein the first frequency, the second frequency, and an odd-order or higher-order intermodulation product of the first frequency and the second frequency lie in a receiving range of the receiver,wherein the first frequency is not equal to the second frequency, andwherein a level of the transmitted two-tone signal lies in a level range in which the received two-tone signal at the receiver lies in the linear range of the receiver, and the odd-order intermodulation product lies above a noise level of the receiver.2. The magnetic resonance tomography scanner of claim 1 , wherein the transmitter is configured to transmit a second two-tone signal that differs from the first two-tone signal in level.3. The magnetic resonance tomography scanner of claim 1 , further comprising an analysis facility that is configured to determine a level of the intermodulation product in an input signal of the receiver.4. The magnetic resonance tomography scanner of claim 1 , further comprising a signal loop that is configured to couple the first two-tone signal of the transmitter into a component of a receive path of the receiver.5. The magnetic resonance tomography scanner of claim 4 , further comprising a local coil claim 4 ,wherein the signal loop comprises the local coil.6. The magnetic resonance tomography scanner of claim 4 , further comprising:a ...

Подробнее
Номер записи: 122
14-05-2015 дата публикации

Transmission Antenna Apparatus and Magnetic Resonance Imaging Device

Номер: US20150130467A1
Автор: Helmut Greim, Johanna Dorothee Schöpfer, Klaus Huber, Sebastian Martius, Stephan Biber
Принадлежит: Individual

The transmission antenna apparatus is configured for emitting transmission magnetic fields in magnetic resonance imaging devices and includes one or more flat antennas. A magnetic resonance imaging device includes such a transmission antenna apparatus.

Подробнее
Номер записи: 123
27-05-2021 дата публикации

MAGNETIC RESONANCE IMAGING SYSTEM WITH A ROTATABLE MAGNET

Номер: US20210156938A1
Автор: Biber Stephan, Greiser Andreas, KARTMANN René
Принадлежит: Siemens Healthcare GmbH

A magnetic resonance imaging system can include a magnetic field generator, an image acquisition region and a radiofrequency system including at least one radiofrequency antenna. The radiofrequency system can emit a radiofrequency excitation pulse into the image acquisition region and receive magnetic resonance signals from the image acquisition region. The magnetic field generator can include at least one magnet to generate a magnetic field in the image acquisition region, a magnet holder to carry the at least one magnet and a rotation system to position the magnet holder along a rotation trajectory. 1. A magnetic resonance imaging (MRI) system comprising:an image acquisition region;a radiofrequency system including at least one radiofrequency antenna, the radiofrequency system being configured to emit a radiofrequency excitation pulse into the image acquisition region and receive magnetic resonance signals from the image acquisition region; and at least one magnet configured to generate a magnetic field in the image acquisition region;', 'a magnet holder configured to carry the at least one magnet; and', 'a rotation system configured to position the magnet holder along a rotation trajectory., 'a magnetic field generator that includes2. The MRI system according to claim 1 , wherein the at least one magnet is configured to generate an inhomogeneous magnetic field in the image acquisition region claim 1 , the inhomogeneous magnetic field including a magnetic field gradient along a radial direction of the rotation trajectory.3. The MRI system according to claim 2 , further comprising a controller configured to perform a spatial encoding of magnetic resonance signals acquired from the image acquisition region based on the magnetic field gradient along the radial direction of the rotation trajectory.4. The MRI system according to claim 1 , wherein the rotation system comprises a mechanical guiding rail configured to guide the magnet holder along the rotation trajectory ...

Подробнее
Номер записи: 124
12-05-2016 дата публикации

MR LOCAL COIL SYSTEM, MR SYSTEM AND METHOD OF OPERATION

Номер: US20160131728A1
Автор: Biber Stephan, Huber Klaus, Schöpfer Johanna Dorothee, Vester Markus
Принадлежит:

A magnetic resonance (MR) local coil system includes local MR transmit coils that may be inductively coupled to at least one power-feed coil of an MR device. At least two local MR transmit coils may be used to generate local B excitation fields that are differently structured with respect to each other. 1. A magnetic resonance (MR) local coil system comprising:a plurality of local MR transmit coils that are inductively coupleable to at least one power-feed coil of an MR device,{'b': '1', 'wherein at least two local MR transmit coils of the plurality of local MR transmit coils are useable to generate local B excitation fields that are differently structured with respect to each other.'}21. The MR local coil system of claim 1 , wherein at least two local MR transmit coils of the plurality of local MR transmit coils are transmit coils that are planar with respect to each other and by which local B excitation fields with different polarization are generateable.3. The MR local coil system of claim 1 , wherein at least one local MR transmit coil of the plurality of local MR transmit coils has a loop-butterfly structure.4. The MR local coil system of claim 3 , wherein the at least one local MR transmit coil is operable as a pure transmit coil claim 3 , as a transmit/receive coil claim 3 , or as a combination thereof.5. The MR local coil system of claim 1 , wherein at least one local MR transmit coil of the plurality of local MR transmit coils comprises a detuning circuit by which the coupling to the at least one power-feed coil is activatable and deactivatable.6. The MR local coil system of claim 2 , wherein at least one local MR transmit coil of the plurality of local MR transmit coils has a loop-butterfly structure.7. The MR local coil system of claim 2 , wherein at least one local MR transmit coil of the plurality of local MR transmit coils comprises a detuning circuit by which the coupling to the at least one power-feed coil is activatable and deactivatable.8. The MR ...

Подробнее
Номер записи: 125
15-09-2022 дата публикации

Magnetic Resonance Device

Номер: US20220291313A1
Автор: Biber Stephan
Принадлежит:

A magnetic resonance device having a main magnet unit with a cylindrical patient aperture. A gradient connection plate for a gradient coil arrangement surrounds the patient aperture. A cladding arrangement with at least one cladding part outwardly delimits the main magnet unit. 1. A magnetic resonance device having a main magnet unit with a cylindrical patient aperture with a diameter of at least 60 cm , wherein the main magnet unit comprises:a cylindrical main magnet arrangement, which is outwardly delimited by a vacuum vessel, in which a support structure supporting main magnet coils is supported by suspension elements which are fastened externally on the vacuum vessel in fastening regions;at least one buttress ring which is guided at least partially about the vacuum vessel, is fastened hereto and covers the fastening regions by cover elements;a gradient connection plate for a gradient coil arrangement surrounds the cylindrical patient aperture; anda cladding arrangement with at least one cladding part outwardly delimits the main magnet unit,wherein the gradient connection plate is fastened on an end face of the main magnet unit between the vacuum vessel and the cladding arrangement, andwherein the at least one buttress ring arranged centrally in a longitudinal direction of the main magnet unit is flatter in a top side region which extends about a highest point of the vacuum vessel and/or a floor region which extends about a lowest point of the vacuum vessel than in a laterally adjoining region.2. The magnetic resonance device of claim 1 , wherein the fastening regions are laterally offset by at least 20 cm in a peripheral direction claim 1 , symmetrically in pairs with respect to a vertical center plane of the vacuum vessel claim 1 , with respect to the highest point of the vacuum vessel.3. The magnetic resonance device of claim 2 , wherein a height of the fastening regions above a surface of the vacuum vessel and/or a height of the at least one buttress ring in ...

Подробнее
Номер записи: 126
24-06-2021 дата публикации

Operating an MR System and an MR System

Номер: US20210186352A1
Автор: Biber Stephan
Принадлежит:

A method is used to operate an MR system having at least one MR body coil and a control device connected to the at least one MR body coil. At least one radiometer is used to measure a body temperature of a body region, which body region can be illuminated by the respective radiometer, of a patient to be examined by the MR system. The measured body temperature is compared with a limit temperature, and an MR transmit power directed at the patient is brought closer to the limit temperature on the basis of a result of the comparison. The radiometer operates, in particular, in a frequency band that differs from the MR band. An MR body coil for performing the method has at least one radiometer antenna and an amplifier connected downstream of the radiometer antenna. The MR body coil can also have an input blocking filter connected downstream of the radiometer antenna and designed to block the MR band. 1. A method for operating an MR system comprising at least one MR body coil and a control device connected to the at least one MR body coil , the method comprising:measuring, by at least one radiometer, at least one body temperature of a body region, which body region can be illuminated by the respective radiometer, of a patient to be examined by the MR system,comparing the measured body temperature with a limit temperature, andbringing an MR transmit power directed at the patient closer to the limit temperature on the basis of a result of the comparison.2. The method as claimed in claim 1 , wherein the radiometer is a Dicke radiometer comprising a radiometer antenna claim 1 , a noise source and a Dicke switch claim 1 , and the Dicke switch is switched over alternately between the radiometer antenna and the noise source.3. The method as claimed in claim 2 , wherein the Dicke switch is connected to the noise source during transmit phases of the MR system and is connected to the radiometer antenna during non-transmit phases of the MR system.4. The method as claimed in claim 2 , ...

Подробнее
Номер записи: 127
24-06-2021 дата публикации

APPARATUS AND METHOD FOR REAL-TIME MONITORING AND CONTROL OF LOCAL COILS

Номер: US20210190890A1
Автор: Biber Stephan, Demharter Nikolaus, Eiermann Franz, Porzelt Klaus
Принадлежит:

The disclosure relates to a local coil, a magnetic resonance tomography scanner, a system including local coil and magnetic resonance tomography scanner, and a method for operating the system. The local coil has an active detuning facility and a passive detuning facility with substantially separate circuits. The magnetic resonance tomography scanner includes a local coil actuation for actuating the active detuning facility and a local coil monitoring for the detuning facilities, which likewise have substantially separate circuits. 1. A local coil comprising:an active detuning facility; anda passive detuning facility,wherein the passive detuning facility and the active detuning facility have substantially separate circuits.2. The local coil of claim 1 , wherein a component necessary for detuning is configured redundantly in the active detuning facility and/or the passive detuning facility.3. The local coil of claim 2 , further comprising:at least one monitoring signal output for a monitoring signal,wherein the local coil is configured to signal with the at least one monitoring signal a functional status of the passive detuning facility and/or the active detuning facility.4. The local coil of claim 1 , further comprising:at least one monitoring signal output for a monitoring signal,wherein the local coil is configured to signal with the at least one monitoring signal a functional status of the passive detuning facility and/or the active detuning facility.5. A magnetic resonance tomography scanner for a local coil having an active detuning facility and a passive detuning facility claim 1 , wherein the magnetic resonance tomography scanner comprises:a local coil actuation; anda local coil monitoring,wherein the local coil actuation and the local coil monitoring have substantially separate circuits.6. The magnetic resonance tomography scanner of claim 5 , further comprising:a controller,wherein the local coil monitoring has a first direct signal link to the controller, ...

Подробнее
Номер записи: 128
29-09-2022 дата публикации

Non-Cylindrical Gradient Coil Unit

Номер: US20220308138A1
Автор: Andreas Krug, Stephan Biber
Принадлежит: Siemens Healthcare GmbH

A gradient coil unit including a first conductor structure arranged within a first form and a second conductor structure arranged within a second form, wherein the first conductor structure and the second conductor structure are designed together to generate a magnetic field gradient in a first direction, the first form and the second form are arranged separately, opposite each other, and divided by a hollow space, and the first form has a segment of a circle as a cross section.

Подробнее
Номер записи: 129
29-09-2022 дата публикации

Apparatus and Method for Supporting a Shimming of a Magnetic Resonance Apparatus

Номер: US20220308140A1
Автор: Stephan Biber
Принадлежит: Siemens Healthcare GmbH

A magnetic resonance apparatus may include at least one sensor and a controller. The magnetic resonance apparatus is positionable in an examination room. A spatial location of the magnetic resonance apparatus in the examination room can be determined using the sensor. In a method for supporting an adjustment of a shim parameter of a magnetic resonance apparatus, a current spatial location of the magnetic resonance apparatus in an examination room is determined using the sensor, and a shim parameter of at least one shim element of the magnetic resonance apparatus is determined based on the current spatial location of the magnetic resonance apparatus and information of a magnetic field database. The magnetic field database may include information about a spatial location of the magnetic resonance apparatus and also magnetic field data correlated with the spatial location.

Подробнее
Номер записи: 130
29-09-2022 дата публикации

Magnetic resonance imaging device with asymmetric field generation unit

Номер: US20220308142A1
Автор: Biber Stephan, Gebhardt Matthias, Greiser Andreas, Krug Andreas, Lauer Lars, MALLETT Michael, Popescu Stefan, Thomas Adrian Mark
Принадлежит:

A magnetic resonance imaging device may include a field generator for generating at least one magnetic gradient field. The field generator may include a first magnet and a second magnet confining an imaging volume of the magnetic resonance imaging device in two spatial directions. The first magnet and the second magnet may be arranged asymmetrically with respect to the imaging volume. The magnetic resonance imaging device may be used to perform a method for acquiring an image of a diagnostically relevant body region of a patient. 1. A magnetic resonance imaging (MRI) device comprising:a field generator including a first magnet and a second magnet confining an imaging volume of the magnetic resonance imaging device in two spatial directions, the field generator being configured to provide a static magnetic field within the imaging volume, wherein:the first magnet and the second magnet are arranged asymmetrically with respect to the imaging volume and configured to provide an access to the imaging volume along at least two perpendicular spatial directions, anda direction of access to the imaging volume is angled with respect to a main magnetic field direction of the magnetic field in the imaging volume.2. The MRI device according to claim 1 , wherein the first magnet comprises a superconducting magnet and the second magnet comprises a permanent magnet or an electromagnet.3. The MRI device according to claim 1 , wherein:the first magnet comprises a plurality of magnet segments, each of the magnet segments including a magnetic field axis, andmagnetic field axes of the plurality of magnet segments are oriented in parallel to a magnetic field axis of the first magnet.4. The MRI device according to claim 3 , wherein:each of the magnet segments comprise a tubular shape;a diameter of at least a first magnet segment of the plurality of magnet segments differs from a diameter of at least a second magnet segment of the plurality of magnet segments;the magnetic field axis of ...

Подробнее
Номер записи: 131
29-09-2022 дата публикации

MONITORING ARCHITECTURE FOR MAGNETIC RESONANCE TRANSMISSION SYSTEMS AND METHOD FOR OPERATING SAME

Номер: US20220308145A1
Автор: Biber Stephan, Speckner Thorsten
Принадлежит:

A magnetic resonance tomography unit includes a transmitter, a transmission monitoring device for monitoring an excitation signal from the transmitter, and a plurality of transmit antennas. The magnetic resonance tomography unit also includes a switching device configured to bring the transmission monitoring device selectively into a signal connection to one transmit antenna of the plurality of transmit antennas. A method for operating the magnetic resonance tomography unit is also provided. 1. A magnetic resonance tomography unit comprises:a transmitter;a transmission monitoring device configured to monitor an excitation signal from the transmitter;a plurality of transmit antennas; anda switching device configured to bring the transmission monitoring device selectively into a signal connection to one transmit antenna of the plurality of transmit antennas.2. The magnetic resonance tomography unit of claim 1 , wherein the transmission monitoring device comprises a plurality of sensors configured to detect a radiofrequency power claim 1 , the plurality of sensors being respectively arranged in a transmit path of the plurality of transmit antennas.3. The magnetic resonance tomography unit of claim 2 , wherein the switching device is further configured to bring claim 2 , controlled by the transmission monitoring device claim 2 , at least one predetermined sensor of the plurality of sensors into a signal connection to the transmission monitoring device.4. The magnetic resonance tomography unit of claim 3 , wherein the transmission monitoring device is further configured to scale a signal from the at least one predetermined sensor by a predetermined weighting.5. The magnetic resonance tomography unit of claim 1 , further comprising a sensor with a signal connection to the transmission monitoring device claim 1 ,wherein the sensor is arranged in a transmit path, andwherein the switching device is further configured to bring, controlled by the transmission monitoring device ...

Подробнее
Номер записи: 132
23-06-2016 дата публикации

SWITCHING FOR DISTRIBUTING RECEIVE SIGNALS OF AN MR SYSTEM TO RECEIVERS

Номер: US20160178712A1
Автор: Biber Stephan
Принадлежит:

The present embodiments relate to a magnetic resonance tomography system including a plurality of MRT connectors for connecting antenna elements of one of a plurality of local coils. The antenna elements of one of the local coils connected to one of the MRT connectors may be switched by a switching matrix to receivers of one of a plurality of receiver blocks, each having a plurality of receivers. 1. A magnetic resonance tomography (MRT) system comprising:a plurality of MRT connectors for connecting antenna elements to respective ones of a plurality of local coils,wherein the antenna elements of a first one of the local coils connect to a first one of the MRT connectors are switched by a switching matrix to receivers of a first one of a plurality of receiver blocks, each the plurality of receiver blocks having a plurality of receivers.2. The system of claim 1 , wherein all of the antenna elements of the first one of the local coils connected to the first one of the MRT connectors are switched by the switching matrix to the receivers of a first one of a plurality of receiver blocks claim 1 , and wherein all of the antenna elements of another of the local coils connected to another of the MRT connectors are switched by the switching matrix to receivers of another receiver block.3. The system of claim 1 , wherein fewer receivers are provided in the magnetic resonance tomography system than the total number of antenna elements provided by the local coils connectable to the MRT connectors.4. The system of claim 1 , wherein the switching matrix claim 1 , the receivers claim 1 , or the switching matrix and/or receivers are installed in the patient couch of the magnetic resonance tomography system.5. The system of claim 1 , wherein claim 1 , out of fewer than all the MRT connectors connected to the switching matrix claim 1 , only antenna elements that are connectable to said MRT connectors are switched to the receivers by the switching matrix.6. The system of claim 1 , ...

Подробнее
Номер записи: 133
21-06-2018 дата публикации

METHOD AND APPARATUS FOR SHUTTING DOWN A SUPERCONDUCTING MAGNET OF A MAGNETIC RESONANCE DEVICE

Номер: US20180172787A1
Автор: ALEY Nicholas, Biber Stephan
Принадлежит: Siemens Healthcare GmbH

In a method and system for shutting down a superconducting magnet of a magnetic resonance apparatus using a monitoring processor and an energy store, the monitoring processor determines stored energy stored in the energy store at a first point-in-time, and determines a ramp energy required for shutting down, and determines a second point-in-time based on the stored energy and the ramp energy. At the second point-in-time, shutting down of the superconducting magnet is begun. 1. A method for shutting down a superconducting magnet of a magnetic resonance apparatus , comprising:with a monitoring processor, determining an amount of stored energy stored in an energy store at a first point-in-time;in said monitoring processor, determining a ramp energy that is required for shutting down said superconducting magnet;in said monitoring processor, determining a second point-in-time based the determined amount of stored energy and the ramp energy; andusing a shutdown controller to begin shutting down said superconducting magnet at said second point-in-time, using said energy stored in said energy store.2. A method as claimed in comprising using said monitoring processor as said shutdown controller.3. A method as claimed in comprising claim 1 , before beginning shutting down of said superconducting magnet claim 1 , determining claim 1 , in said monitoring processor claim 1 , whether the superconducting magnet is connected to a further energy source claim 1 , other than said energy store claim 1 , and implementing shutting down of said superconducting magnet using energy stored in said energy store only in an absence of a further energy source.4. A method as claimed in comprising claim 2 , in an absence of a further energy source claim 2 , switching off said monitoring processor after determining said second point-in-time claim 2 , and using a timer claim 2 , as said shutdown controller claim 2 , to trigger shutting down of said superconducting magnetic.5. A method as claimed in ...

Подробнее
Номер записи: 134
21-06-2018 дата публикации

Calibrating a magnetic resonance apparatus

Номер: US20180172792A1
Автор: Stephan Biber
Принадлежит: Individual

A method for calibrating at least one operating parameter of a magnetic resonance apparatus and a corresponding magnetic resonance apparatus and computer program product are provided. The at least one operating parameter includes a constant component and a variable component. The method includes, after a start-up of at least one part of the magnetic resonance apparatus, determining the variable component of the at least one operating parameter. The constant component of the at least one operating parameter is provided. The constant component and the variable component are used to calibrate the at least one operating parameter.

Подробнее
Номер записи: 135
07-07-2016 дата публикации

ARCHITECTURE FOR CASCADED SIGNAL SELECTION AND SIGNAL CONCENTRATION AND/OR REDUCTION OF DIGITAL RECEIVED DATA BY DECIMATION AND CHANNEL PRESELECTION

Номер: US20160195595A1
Автор: Biber Stephan, Pirkl Georg
Принадлежит:

A magnetic resonance tomography system includes a plurality of MRT plugs for connection of antenna elements, respectively, of one of a plurality of local coils. Due to at least one analog switch matrix, antenna elements respectively connected to fewer than all of the MRT plugs may be connected in an analog fashion to receive signal processing elements of one of a plurality of receive signal processing element blocks respectively having a plurality of receive signal processing elements. Between outputs of receive signal processing element blocks and an evaluation device of the magnetic resonance tomography system, a digital channel selection unit is provided. On an input side of the digital channel selection unit, the digital channel selection unit may be connected to antenna elements. Signals from fewer antenna elements are present at the output of the digital channel selection unit than at an input of the digital channel selection unit. 1. A magnetic resonance tomography system comprising:a plurality of magnetic resonance tomography (MRT) plugs for connection of respective antenna elements of one of a plurality of local coils,at least one analog switch matrix, due to which antenna elements respectively connected to fewer than all of the MRT plugs are connectable in an analog fashion to receive signal processing elements of one of a plurality of receive signal processing element blocks respectively having a plurality of receive signal processing elements; andan evaluation device; anda digital channel selection unit provided between outputs of the receive signal processing element blocks and the evaluation device, the digital channel selection unit, on an input side, being connectable to the antenna elements,wherein signals from fewer antenna elements are present at the output of the digital channel selection unit than at the input of the digital channel selection unit.2. The magnetic resonance tomography system of claim 1 , wherein fewer receive signal processing ...

Подробнее
Номер записи: 136
18-06-2020 дата публикации

METHOD AND DEVICE FOR MONITORING LOCAL COILS

Номер: US20200191890A1
Автор: Biber Stephan, Kurth Rainer, Martschenko Georg, Matschl Volker, Nistler Jürgen, Wünsch Christian
Принадлежит:

A system and method are provided for operating a magnetic resonance tomograph. A transmitter of the magnetic resonance tomograph transmits a predetermined test pulse with a reduced power. The magnetic resonance tomograph receives the test pulse with the local coil. A controller compares the received test pulse with a predetermined pulse response and emits a warning signal when the received test signal differs from the predetermined pulse response. 1. A method for operating a magnetic resonance tomograph , the magnetic resonance tomograph comprising a controller , a local coil , and a transmitter for transmitting a test pulse , the method comprising:transmitting, by the transmitter, a predetermined test pulse with reduced power;receiving, by the local coil, the predetermined test pulse;comparing, by the controller, the received predetermined test pulse with a predetermined pulse response; andemitting, by the controller, a warning signal when the received predetermined test pulse deviates from the predetermined pulse response.2. The method of claim 1 , wherein the predetermined test pulse has an amplitude of 0 volt and the predetermined pulse response has an elevated noise level.3. The method of claim 1 , wherein an amplitude of the predetermined test pulse increases over a duration of the predetermined test pulse from a lower start value to a higher stop value.4. The method of claim 3 , wherein the local coil includes a detuning device and during receiving claim 3 , the detuning device of the local coil is activated.5. The method of claim 1 , wherein the predetermined pulse response has a threshold value.6. The method of claim 1 , wherein the predetermined pulse response is proportional to the predetermined test pulse.7. The method of claim 1 , further comprising:activating a detuning device of an antenna coil;receiving, by a receiver, a first receive signal;receiving a second receive signal with the receiver;comparing the first receive signal with the second receive ...

Подробнее
Номер записи: 137
26-07-2018 дата публикации

LOCAL COIL DEVICE FOR A HEAD OF A PATIENT, SHIM COIL DEVICE AND METHOD FOR COMPENSATING BASIC FIELD INHOMOGENEITIES IN A REGION OF INTEREST OF THE PREFRONTAL CORTEX OF THE PATIENT

Номер: US20180210049A1
Автор: Biber Stephan
Принадлежит:

A local coil device for a head of a patient for use in a magnetic resonance device includes a local coil with at least one local coil element and a receiver for the head of the patient in which the head may be received in a desired pose. The local coil device also includes a shim coil device with at least one shim coil element for compensating basic field inhomogeneities in a region of interest of the prefrontal cortex of the patient. With respect to the desired pose, the shim coil element of the shim coil device integrated in the local coil or received in a receiver for the shim coil device is arranged anterior to the head. 1. A local coil device for a head of a patient for use in a magnetic resonance device , the local coil device comprising:a local coil including at least one local coil element and a receiver for the head of the patient in which the head is receivable in a desired pose; anda shim coil device including at least one shim coil element for compensating basic field inhomogeneities in a region of interest of the prefrontal cortex of the patient,wherein with respect to the desired pose, the at least one shim coil element of the shim coil device integrated in the local coil or received in a receiver for the shim coil device is arranged anterior to the head.2. The local coil device of claim 1 , wherein the at least one shim coil element and the at least one local coil element are metallically isolated claim 1 , the at least one shim coil element has a radio frequency choke for decoupling from the at least one local coil element claim 1 , or the at least one shim coil element and the at least one local coil element are metallically isolated and the at least one shim coil element has a radio frequency choke for decoupling from the at least one local coil element.3. The local coil device of claim 1 , wherein one or more shim coil elements of the at least one shim coil element has just one winding claim 1 , one or more shim coil elements of the at least one ...

Подробнее
Номер записи: 138
25-06-2020 дата публикации

METHOD AND MAGNETIC RESONANCE IMAGING DEVICE FOR PROVIDING AN MR-IMAGE, COMPUTER PROGRAM, AND COMPUTER-READABLE STORAGE MEDIUM

Номер: US20200200849A1
Автор: Biber Stephan, Grodzki David, WENG De He, Zhou Kun
Принадлежит: Siemens Healthcare GmbH

A method and a magnetic resonance imaging device, and a corresponding computer readable storage medium. The method includes acquiring a distortion function describing a frequency dependence of an amplitude or phase of an MR-signal received by a receiver part of the MRI-device, Fourier transforming K-space data acquired using this receiver part to image space data, generating compensated image space data by compensating for the frequency dependence by dividing the image space data or image space data derived therefrom in image space by the distortion function, and providing the MR-image as the compensated image space data or reconstructed therefrom. 1. A method for providing an MR-image , comprising:acquiring at least one distortion function that describes a frequency dependence of an amplitude or of a phase of an MR-signal received by a receiver part of an MRI-device;acquiring k-space data measured using the receiver part;Fourier transforming the k-space data to image space data;generating compensated image space data by compensating for the frequency dependence in the image space data by dividing the image space data or image space data derived therefrom in image space by the distortion function; andproviding the MR-image as the compensated image space data or reconstructed therefrom.2. The method according to claim 1 , wherein the at least one distortion function is acquired by an S21-measurement claim 1 , whereby a transmission between an auxiliary antenna provided as a sender and the receiver part is measured in terms of amplitude and phase using a predetermined signal.3. The method according to claim 1 , further comprising claim 1 , if over the whole k-space data acquisition for the respective MR-image a readout gradient is unchanged:reconstructing a preliminary MR-image from the image space data; anddividing the preliminary MR-image by the at least one distortion function to generate the compensated image space data as the MR-image.4. The method according to ...

Подробнее
Номер записи: 139
13-08-2015 дата публикации

Magnetic Resonance Imaging with Whole Body and Local Coil Systems

Номер: US20150226820A1
Автор: Biber Stephan, Nistler Jürgen, Speckner Thorsten
Принадлежит:

A magnetic resonance imaging system includes an arrangement of magnet systems for generating a homogeneous main magnetic field and additional gradient fields for spatial encoding. At least one transmission coil is used to radiate in an alternating electromagnetic field in order to induce magnetic resonance signals and measure the latter using at least one reception coil. The magnetic resonance imaging system is configured in such that, during an imaging measurement of the magnetic resonance signals for generating the alternating electromagnetic field, at least one fixedly installed whole body coil system and at least one mobile local coil system are operated simultaneously with separately actuated channels. 1. A method for generating magnetic resonance recordings using a magnetic resonance imaging system , the method comprising:generating, via an arrangement of magnet systems, a homogeneous main magnetic field and gradient fields for spatial encoding;generating, via at least one transmission coil, an alternating electromagnetic field to induce magnetic resonance signals; andmeasuring the magnetic resonance signals with at least one reception coil;wherein generating the alternating electromagnetic field comprises operating at least one fixedly installed whole body coil system and at least one mobile local coil system simultaneously with separately actuated channels.2. The method of claim 1 , wherein operating the at least one whole body coil system comprises operating the at least one whole body coil system with a plurality of separately actuated channels.3. The method of claim 1 , wherein operating the at least one local coil system comprises operating the at least one local coil system with a plurality of separately actuated channels.4. The method of claim 1 , wherein generating the alternating electromagnetic field further comprises claim 1 , prior to measuring the magnetic resonance signals claim 1 , varying actuation of the at least one transmission coil to ...

Подробнее
Номер записи: 140
20-08-2015 дата публикации

Local SAR Behavior of MRI Transmission Coils by Use of Orthogonal Loop Antennas

Номер: US20150234019A1
Автор: Biber Stephan
Принадлежит:

A local coil for a magnetic resonance imaging system includes at least one former antenna and at least one further antenna. The at least one former antenna is arranged orthogonally with respect to the at least one further antenna. 1. A local coil for a magnetic resonance imaging system , the local coil comprising:at least one former antenna and at least one further antenna,wherein the at least one former antenna is arranged orthogonally with respect to the at least one further antenna.2. The local coil of claim 1 , wherein the at least one former antenna comprises a plurality of former antennas claim 1 , and the at least one further antenna comprises a plurality of further antennas claim 1 , andwherein the plurality of former antennas are arranged orthogonally with respect to the plurality of further antennas.3. The local coil of claim 1 , wherein the local coil is arranged in a bore of a magnetic resonance imaging system such that the at least one further antenna of the local coil is arranged so that a surface normal of the at least one further antenna is arranged parallel to a direction of a basic magnetic field in the bore of the magnetic resonance imaging system.4. The local coil of claim 1 , wherein the at least one former antenna is arranged orthogonally with respect to the at least one further antenna in order to enable an optimization of a local SAR behavior of the local coil.5. The local coil of claim 1 , wherein some or all antennas of the at least one former antenna and the at least one further antenna are loop antennas claim 1 , andwherein an area in which the at least one former antenna is arranged is orthogonal with respect to an area in which the at least one further antenna is arranged.6. The local coil of claim 1 , wherein the at least one former antenna is arranged in a plane having a surface normal that is arranged perpendicularly or horizontally and perpendicularly to a longitudinal direction of a patient couch claim 1 , to a longitudinal ...

Подробнее
Номер записи: 141
19-08-2021 дата публикации

MAGNETIC RESONANCE TOMOGRAPHY SYSTEM WITH B0 MODULATION AND METHOD FOR OPERATION

Номер: US20210255267A1
Автор: Biber Stephan, Vester Markus
Принадлежит:

The disclosure relates to a magnetic resonance tomography system and to a method for operation of the magnetic resonance tomography system. The magnetic resonance tomography system has a magnetic unit, which is configured to change a homogeneous magnetic field B0 with a magnetic field strength, which may vary between a first predetermined value on exciting nuclear spins and a second predetermined value on receiving magnetic resonance signals, in a measuring volume in a short, predetermined time, controlled by the magnetic resonance tomography system. 1. A magnetic resonance tomography system comprising:a magnetic unit; anda magnetic controller,wherein the magnetic unit is configured, by the magnetic controller, to change a homogeneous magnetic field B0 with a magnetic field strength,wherein the magnetic field strength, as controlled by the magnetic resonance tomography system, is configured to vary between a first predetermined value of the magnetic field strength on exciting nuclear spins and a second predetermined value of the magnetic field strength on receiving magnetic resonance signals, in a measuring volume in a short predetermined time.2. The magnetic resonance tomography system of claim 1 , wherein a Larmor frequency of a nucleus to be examined lies in an Industrial claim 1 , Scientific claim 1 , Medical (ISM) band in a case of the first value of the magnetic field strength and lies outside of the ISM band in a case of the second value of the magnetic field strength.3. The magnetic resonance tomography system of claim 2 , further comprising:a sensor configured to receive an interference signal; andan active interference suppression for reducing an interference signal component in a received magnetic resonance signal as a function of the received interference signal.4. The magnetic resonance tomography system of claim 3 , wherein the magnetic unit further comprises: a superconducting field magnet for generating a static magnetic field component; and a ...

Подробнее
Номер записи: 142
27-08-2015 дата публикации

Magnetic Resonance Imaging Apparatus and Method for Measurement Signal Acquisition in a Magnetic Resonance Imaging Apparatus

Номер: US20150244482A1
Автор: Biber Stephan
Принадлежит:

A magnetic resonance imaging apparatus is provided. The apparatus includes a plurality of receiving antennas for receiving a plurality of reception signals. The apparatus also includes at least one first superposition device having at least one first and one second output, which in each case serve for providing a mode formed by superposition of at least two of the reception signals. The apparatus also includes at least one first frequency division multiplex device for transmitting input signal present at a first and a second input of the frequency division multiplex device via a first transmission link on different frequency bands to a receiving unit, wherein the first output of the first superposition device is connected to the first input of the first frequency division multiplex device and the second output of the first superposition device is connected directly or indirectly to a second transmission link. 1. A magnetic resonance imaging apparatus comprising:a plurality of receiving antennas for receiving a plurality of reception signals;a first superposition device comprising a first output and a second output, the first output and the second output each providing a mode formed by superposition of at least two of the reception signals; anda first frequency division multiplex device for transmitting input signal present at a first input and a second input of the frequency division multiplex device via a first transmission link on different frequency bands to a receiving unit,wherein the first output of the first superposition device is connected to the first input of the first frequency division multiplex device and the second output of the first superposition device is connected directly or indirectly to a second transmission link.2. The magnetic resonance imaging apparatus as claimed in claim 1 , further comprising a second superposition device claim 1 , a second frequency division multiplex device claim 1 , or the second superposition device and the second ...

Подробнее
Номер записи: 143