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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

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Мониторинг СМИ

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

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 4777. Отображено 100.
22-03-2012 дата публикации

Gradient Coil Sub-Assemblies

Номер: US20120068708A1
Автор: Allen Raymond Camp
Принадлежит: Tesla Engineering Ltd

An MRIS gradient coil sub-assembly comprising a first coil layer comprising a first conducting coil portion, a second coil layer comprising a second conductive coil portion electrically connected with the first conductive coil portion so that the first and second conductive coil portions act together as one winding, and a B-stage material consolidation layer sandwiched between the first and second coil layers.

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Номер записи: 1
22-03-2012 дата публикации

Method for affixing a magnetic resonance rf coil to a patient

Номер: US20120071750A1
Автор: Jan Bollenbeck, Wolfgang Renz
Принадлежит: SIEMENS AG

In a method to affix RF coils (in particular local coils) on a patient in examinations with a magnetic resonance apparatus, a horizontal board accommodates the patient for a magnetic resonance examination to be implemented, an RF coil that has coil electronics is affixed with a fastening strap on the patient, and the fastening strap has a connection cable integrated therewith. The coil electronics are supplied with energy via the integrated connection cable.

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Номер записи: 2
29-03-2012 дата публикации

MRI Coil Design

Номер: US20120074935A1
Автор: Bing Keong Li, Ewald Weber, Feng Liu, Stuart Crozier
Принадлежит: Individual

A coil for a magnetic resonance imaging device consists of multiple coil elements arranged about an imaging space. Each coil element comprise radiating structures oriented at an angle to a tangent of the imaging space. Angling the radiating structures reduces mutual coupling between coil elements and enhances the penetration of the radio frequency field to the imaging space.

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Номер записи: 3
10-05-2012 дата публикации

High magnetic field compatible interventional needle and integrated needle tracking system

Номер: US20120116209A1
Автор: Axel Winkel, Bernardus Hendrikus Wilhelmus Hendriks, John Brean Mills, Mareike Klee, Ronald Dekker
Принадлежит: KONINKLIJKE PHILIPS ELECTRONICS NV

An elongate device (e.g. a catheter) for interventional MRI has one or more passive LC-circuits (wireless markers) attached to its distal tip portion for position tracking. The LC-circuits comprise an inductor winding ( 480 ) and a three-dimensional “trench” capacitor ( 420 - 440 ) and are integrated in a piece of silicon ( 410 ). Optical fibres may be included in the device for optical probing of tissue surrounding the distal tip portion.

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Номер записи: 4
07-06-2012 дата публикации

Mrt receiver coil with local data storage

Номер: US20120139538A1
Автор: Markus Vester, Sebastian Schmidt
Принадлежит: SIEMENS AG

The present embodiments relate to a method and a local coil arrangement for a magnetic resonance tomography system. The local coil arrangement includes an antenna element for the reception of signals from an object under examination. The local coil arrangement also includes an A/D converter for the conversion of analog signals received with the antenna element into digitized signals, and a memory configured for the storage of the digitized signals.

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Номер записи: 5
05-07-2012 дата публикации

Open Architecture Imaging Apparatus and Coil System for Magnetic Resonance Imaging

Номер: US20120172704A1
Автор: Cameron Anthony Piron, Christopher Alexander Luginbuhl, Donald B. Plewes
Принадлежит: Hologic Inc

Apparatus and method for using radio frequency coil systems for magnetic resonance imaging within an open architecture apparatus is provided. The MRI coil system includes a support structure with an open architecture in which secondary support structures, compression systems and plates containing RF coil systems may be introduced. These structures and RF coils can be moved relative to the patient, or removed entirely from the system. In one embodiment the system consists of a tabletop coil system, while another embodiment consists of a dedicated stretcher design.

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Номер записи: 6
09-08-2012 дата публикации

Magnetic resonance antenna arrangement

Номер: US20120200294A1
Автор: Razvan Lazar
Принадлежит: SIEMENS AG

A magnetic resonance antenna arrangement having a plurality of antenna elements disposed around a measurement chamber and a plurality of switching elements is provided. The antenna elements and the switching elements are disposed and interconnected such that in a first switching configuration of the switching elements, the antenna elements form a first antenna architecture, and in a second switching configuration of the switching elements, the antenna elements form a second antenna architecture.

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Номер записи: 7
23-08-2012 дата публикации

Magnetic resonance imaging apparatus

Номер: US20120212225A9
Автор: Mina IWAMA, Takashi Ishiguro, Yusuke Asaba
Принадлежит: Individual

A magnetic resonance imaging apparatus includes a bore configured to accommodate a subject therein, an RF coil positioned about the bore, and an RF shield positioned about the RF coil. The RF coil includes a first portion positioned adjacent a lower surface side of the bore and spaced a distance from the RF shield that is larger than a distance between a second portion of the RF coil and an upper surface side of the bore.

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Номер записи: 8
27-09-2012 дата публикации

Remotely adjustable reactive and resistive electrical elements and method

Номер: US20120242550A1
Автор: Carl J. Snyder, Charles A. Lemaire, John Thomas Vaughan, Jr.
Принадлежит: Life Services LLC

Apparatus and method that includes providing a variable-parameter electrical component in a high-field environment and based on an electrical signal, automatically moving a movable portion of the electrical component in relation to another portion of the electrical component to vary at least one of its parameters. In some embodiments, the moving uses a mechanical movement device (e.g., a linear positioner, rotary motor, or pump). In some embodiments of the method, the electrical component has a variable inductance, capacitance, and/or resistance. Some embodiments include using a computer that controls the moving of the movable portion of the electrical component in order to vary an electrical parameter of the electrical component. Some embodiments include using a feedback signal to provide feedback control in order to adjust and/or maintain the electrical parameter. Some embodiments include a non-magnetic positioner connected to an electrical component configured to have its RLC parameters varied by the positioner.

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Номер записи: 9
04-10-2012 дата публикации

Image recording device for the simultaneous recording of magnetic resonance image data and nuclear medical image data

Номер: US20120253174A1
Автор: Stefan Popescu
Принадлежит: SIEMENS AG

An image recording device is disclosed for the simultaneous recording of magnetic resonance image data and nuclear medical image data, in particular PET image data. In at least one embodiment, the image recording device includes a nuclear medical detector arrangement integrated into a magnetic resonance device, wherein a fluorescence detector arrangement including an optical system and designed for fluorescence imaging is also integrated into the magnetic resonance device.

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Номер записи: 10
25-10-2012 дата публикации

Magnetic Resonance Signal Detection Using Remotely Positioned Receive Coils

Номер: US20120268132A1
Автор: Haoqin Zhu, John Saunders, Labros Petropoulos, Mehran Fallah-Rad, Michael Lang, Wayne Schellekens
Принадлежит: Individual

The receive coil arrangement includes an inner local volume coil adjacent the part to be imaged so as to maximize the received MR signal and an outer coil, which may be the built in body coil of the magnet, connected by cable to the signal processing system. Both the coils are individually tuned to the common resonant frequency and the local volume coil include an arrangement to halt current flow therein during the transmit stage. The local volume coil has no cable and is arranged to communicate the MR signal therein to the signal processing system through the outer coil by inductive coupling to the outer coil. Despite inherent losses by interfering with the tuning of the loops and in the inductive coupling this magnifies the MR signal and makes the local volume coil wireless.

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Номер записи: 11
01-11-2012 дата публикации

Msc-selmqc method for simultaneous mapping of polyunsaturated fatty acids, lactate and choline in high fat tissues

Номер: US20120274323A1
Автор: Qiuhong He
Принадлежит: University of Pittsburgh

Systems and methods employing spin editing techniques to improve magnetic resonance spectroscopy (MRS) and magnetic resonance spectroscopic imaging (MRSI) are discussed. Using these spin editing techniques, magnetic resonance signals of one or more unwanted chemicals (that is, chemicals whose signals are to be filtered out or suppressed) chemicals can be suppressed, so that the signal(s) of a first set of chemicals can be obtained without signals from the one or more unwanted chemicals. Information about and differences between the molecular topologies of the first set of chemicals and the one or more unwanted chemicals can be used to design a sequence that suppresses the one or more unwanted chemicals while allowing acquisition of signal(s) from the first set of chemicals.

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Номер записи: 12
08-11-2012 дата публикации

Linear Phase Microstrip Radio Frequency Transmit Coils

Номер: US20120280685A1
Автор: Dennis L. Parker, Glen R. Morrell, J. Rock Hadley
Принадлежит: University of Utah Research Foundation UURF

Systems, devices and methods provide an RF coil which produces a field having linear phase variation across an imaging volume. In one embodiment, a coil comprises multiple microstrip elements configured to have an increased effective electrical length. This increase in electrical length allows for a larger linear phase shifts over the length of the microstrip element which in turn increases linear phase variation capabilities. This may be accomplished by increasing the effective dielectric properties of the microstrip element. Increasing the effective dielectric may be accomplished by utilizing distributed capacitors along the length of a microstrip element (e.g. lumped element capacitors), by altering the materials used to fabricate the microstrip element, etc. Additionally, increasing the effective dielectric may be accomplished using a combination of these means. Embodiments may further enable linear phase variation along the imaging volume at high frequencies, such as frequencies utilized for 3 T and above MRI devices.

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Номер записи: 13
13-12-2012 дата публикации

Nmr device for detection of analytes

Номер: US20120313639A1
Автор: W. David Lee
Принадлежит: T2 Biosystems Inc

This invention relates generally to detection devices having one or more small wells each surrounded by, or in close proximity to, an NMR micro coil, each well containing a liquid sample with magnetic nanoparticles that self-assemble or disperse in the presence of a target analyte, thereby altering the measured NMR properties of the liquid sample. The device may be used, for example, as a portable unit for point of care diagnosis and/or field use, or the device may be implanted for continuous or intermittent monitoring of one or more biological species of interest in a patient.

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Номер записи: 14
24-01-2013 дата публикации

System for Adapting an RF Transmission Magnetic Field for Image Acquisition

Номер: US20130021033A1
Автор: Bernd Stoeckel, Stefan Roll
Принадлежит: Siemens Medical Solutions USA Inc

A system generates a Radio Frequency (RF) magnetic field in an MR imaging unit using an RF transmitting coil for generating a Radio Frequency (RF) magnetic field and multiple RF receiver coils for receiving RF signals for Magnetic Resonance (MR) image data acquisition. An RF transmission coil generates an RF magnetic field. An RF receiver coil receives an RF signal for MR image data acquisition and couples a magnetic field from the RF receiver coil to the RF transmission coil for adaptively altering the RF magnetic field generated by the RF transmission coil to reduce inhomogeneity in the RF magnetic field generated by the RF transmission coil in response to applying an RF pulse to the RF transmission coil. An adjustment processor adjusts characteristics of the RF receiver coil to alter the RF magnetic field generated by the RF transmission coil.

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Номер записи: 15
24-01-2013 дата публикации

Adapter for a direct-connection head coil with adjustable tilt angle

Номер: US20130023756A1
Автор: Daniel Driemel, Hubertus Fischer
Принадлежит: SIEMENS AG

An adapter for a local coil for a magnetic resonance tomography device is provided. The adapter is placeable on a patient support for the magnetic resonance tomography device. The adapter includes an adapter upper part that is removably connectable to the local coil. The adapter also includes an adapter lower part that is removably connectable to the patient support. The adapter also includes a tilt device, by which the adapter upper part is movable relative to the adapter lower part.

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Номер записи: 16
07-02-2013 дата публикации

Apparatus for improving grounding for an electrical component and method of making same

Номер: US20130033835A1
Автор: Fraser John Laing Robb, II Miguel Angel Navarro, Peter Asuzu, Victor Taracila, Vijayanand Alagappan
Принадлежит: General Electric Co

A multi-layer cradle comprises a first layer comprising first and second contact pads configured to be electrically coupled to a signal input and a signal output of the electronic component, respectively. The first layer also comprises a first ground plane configured to be electrically coupled to a ground of the electronic component and a first fence positioned about the first ground plane. The first ground plane is positioned at least between the first and second contact pads. A second layer comprising a second ground plane is also included. The cradle further comprises a first dielectric material positioned between the first and second layers, a ground plane via extending through the first dielectric material and electrically coupled to the first and second ground planes, and a plurality of fence vias extending through the first dielectric material and electrically coupled to the first fence and to second ground plane.

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Номер записи: 17
28-03-2013 дата публикации

RF RECEIVING COIL AND MAGNETIC RESONANCE IMAGING APPARATUS USING THE SAME

Номер: US20130076361A1
Автор: Kobayashi Chie, Oosawa Tooru, Taniguchi Takeshi
Принадлежит:

To order to provide an RF receiving coil having a structure that can be safely mounted on an object and an MRI apparatus including the RF receiving coil, the RF receiving coil includes a main body having one or more flexible closed conductor loops for receiving a nuclear magnetic resonance signal, a flexible outer cover section that covers the closed conductor loop, a preamplifier section that amplifies the nuclear magnetic resonance signal received by the closed conductor loop, and a housing section in which the preamplifier section is housed and which is more rigid than the outer cover section. The RF receiving coil is mounted on the object in a state where the main body is bent such that the end surfaces of both ends of the main body face each other, and the MRI apparatus performs imaging using such an RF receiving coil. 1. An RF receiving coil that is mounted on an object in order to receive a nuclear magnetic resonance signal from the object , the RF receiving coil comprising:a main body having a flexible closed conductor loop configured to receive the nuclear magnetic resonance signal, a flexible outer cover section that covers the closed conductor loop, a preamplifier section that amplifies the nuclear magnetic resonance signal received by the closed conductor loop, and a housing section in which the preamplifier section is housed and which is more rigid than the outer cover section,wherein the RF receiving coil is mounted on the object in a state where the main body is bent such that end surfaces of both ends of the main body face each other.2. The RF receiving coil according to claim 1 ,wherein the housing section is disposed approximately in the middle of the main body, andthe RF receiving coil is mounted on the object in a state where the main body is bent such that opposite places of the end surfaces of both the ends of the main body are disposed above the housing section.3. The RF receiving coil according to claim 1 ,wherein the main body includes a ...

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Номер записи: 18
16-05-2013 дата публикации

Spatially Coincident MRI Receiver Coils and Method For Manufacturing

Номер: US20130119987A1
Автор: Felmlee Joel P.
Принадлежит:

A magnetic resonance imaging receiver coil provides for high SNR and high uniformity over a range of loading conditions with layers, or stacks, of independent conductive elements. The plurality of layers preload the receiver coil reducing the circuit variation as the subject coupling and loading varies. The preload is such that coil performance, or SNR, is maintained over a large range of impedance variation. This configuration is designed to exceed the performance of single trace coils over a range of impedance consistent with variations associated with different subjects, and may also incorporate coils of different resonance frequencies. 1. A radio frequency (RF) coil for use with a magnetic resonance system , the RF coil comprising:a plurality of electrically independent conductor elements, each conductor element extending in a different one of a similar plurality of adjacent planes each separated by a separation distance that is selected to adjust inductive coupling between the plurality of electrically independent conductor elements; andan electrical connector for coupling each of the plurality of conductor elements to a magnetic resonance system.2. The RF coil as recited in in which the electrical connector is configured such that each of the plurality of conductor elements are individually coupled to the magnetic resonance system.3. The RF coil as recited in in which some of the plurality of conductor elements are tuned to a first resonance frequency and others of the plurality of coil conductor elements are tuned to a second resonance frequency.4. The RF coil as recited in further comprising a substrate on which each of the plurality of conductor elements is disposed.5. The RF coil as recited in in which the substrate comprises a plurality of printed circuit boards.6. The RF coil as recited in in which each of the plurality of printed circuit boards has disposed thereon a first conductor element on one side of the printed circuit board and a second conductor ...

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Номер записи: 19
16-05-2013 дата публикации

Local Coil

Номер: US20130119988A1
Автор: Driemel Daniel, Greim Helmut, Wolf Steffen
Принадлежит:

A local coil for a magnetic resonance tomography device includes a plurality of antenna elements. Each antenna element of the plurality of antenna elements has two conductor tracks. The conductor tracks are disposed on opposite sides of an insulator and are connected electrically conductively to one another by plated through-holes through the insulator. In areas, in which conductor tracks of at least two antenna elements of the plurality of antenna elements cross, at least one antenna element of the at least two antenna elements only has a conductor track on one side of the insulator. 1. A local coil for a magnetic resonance tomography device , the local coil comprising:a plurality of antenna elements,wherein an antenna element of the plurality of antenna elements has two conductor tracks that are disposed on opposite sides of an insulator and are connected electrically-conductively to one another by plated through-holes through the insulator, andwherein in at least one area, in which conductor tracks of at least two antenna elements of the plurality of antenna elements cross, at least one antenna element of the two antenna elements only has a conductor track on one side of the insulator.2. The local coil as claimed in claim 1 , wherein only in the at least one crossing area of the at least two antenna elements claim 1 , in which the conductor tracks of the at least two antenna elements cross one another claim 1 , at least one antenna element of the at least two antenna elements only has a continuous conductor track on a lower side of the insulator claim 1 , and at least one further antenna element of the at least two antenna elements only has a continuous conductor track on an upper side of the insulator.3. The local coil as claimed in claim 1 , wherein conductor tracks of more than two antennas of the plurality of antennas cross in crossing areas.4. The local coil as claimed in claim 1 , wherein the crossing conductor tracks of a subset of antenna elements of the ...

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Номер записи: 20
06-06-2013 дата публикации

Nmr spectroscopy device based on resonance type impedance (ir) sensor and method of nmr spectra acquisition

Номер: US20130141095A1
Автор: Yury Nikolenko
Принадлежит: NeoVision LLC

Processes and apparatuses are provided for contactless Nuclear magnetic resonance (“NMR”) spectrum acquiring and spectroscopic analysis and/or measuring or monitoring, in-line, in-situ and/or in real time, at least one composition or object under test of one or more solid, liquid, and/or gaseous substances and/or one or more bulk materials. One or more apparatus may include a resonance type impedance sensor having at least two coils, at least one coil of the at least two coils being at least one excitation coil, at least one other coil of the at least two coils being at least one sensing coil. The method(s) involve acquiring an NMR spectrum of an object under test while changing at least one of the frequency of an IR sensor and the intensity of the magnetic field applied to an object under test and/or sweeping intensity of the magnetic field applied to the object under test.

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Номер записи: 21
13-06-2013 дата публикации

Method and apparatus for characterizing and optimizing an rf coil in a magnetic resonance imaging system

Номер: US20130147484A1
Автор: Bijay Kamleshbhai Shah, Eddy Benjamin Boskamp, Ricardo Becerra
Принадлежит: General Electric Co

An MRI apparatus includes a magnetic resonance imaging (MRI) system having a plurality of gradient coils positioned about a bore of a magnet, an RF coil assembly having at least a first port and a second port, an RF transceiver system having a pulse module and configured to transmit RF signals to the first port and the second port, and a computer programmed to drive the RF coil assembly in quadrature through the at least first port and the second port, measure a B 1 field using at least one flux probe at two or more angular orientations within the RF coil assembly, and characterize and optimize performance of the MRI system based on the measurements of the B 1 field.

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Номер записи: 22
20-06-2013 дата публикации

Magnetic resonance imaging apparatus and magnetic resonance imaging method

Номер: US20130154642A1
Автор: Kazuhiro Sueoka
Принадлежит: Toshiba Corp, Toshiba Medical Systems Corp

In one embodiment, an MRI apparatus ( 20 ) includes “a temperature measuring unit ( 70 A to 70 D) performing temperature measurement of a gradient magnetic field coil unit ( 26 )”, a data storing unit ( 100 ), a pulse setting unit ( 102 ), and an imaging unit. The data storing unit stores the first and second data indicating a shift of a center frequency of magnetic resonance of hydrogen atoms. The first data corresponds to a case of temperature rise of the gradient magnetic field coil unit, and the second data corresponds to a case of temperature fall of that. The pulse setting unit corrects a center frequency of an RF pulse by calculating an estimated shift of the center frequency based on data corresponding to result of the temperature measurement out of the first and second data. The imaging unit performs magnetic resonance imaging based on the corrected RF pulse.

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Номер записи: 23
20-06-2013 дата публикации

SYSTEM AND APPARATUS FOR COMPENSATING FOR MAGNETIC FIELD DISTORTION IN AN MRI SYSTEM

Номер: US20130154648A1
Автор: Havens Timothy J., Jiang Longzhi, Kidane Tesfaye K., Shen Weijun
Принадлежит: GENERAL ELECTRIC COMPANY

A magnet apparatus for a magnetic resonance imaging system, the magnet apparatus includes a vacuum vessel, a helium vessel disposed within the vacuum vessel and a thermal shield disposed between the vacuum vessel and the helium vessel. A set of passive compensation coils are disposed within the vacuum vessel or the helium vessel and used to compensate for magnetic field distortion caused by mechanical vibrations within the magnet apparatus. 1. A magnet apparatus for a magnetic resonance imaging system , the magnet apparatus comprising:a vacuum vessel;a helium vessel disposed within the vacuum vessel;a thermal shield disposed between the vacuum vessel and the helium vessel; anda set of passive compensation coils disposed within the vacuum vessel.2. A magnet apparatus according to claim 1 , wherein the set of passive compensation coils comprises:a first set of passive compensation coils for a z-axis direction;a second set of passive compensation coils for a y-axis direction; anda third set of passive compensation coils for an x-axis direction.3. A magnet apparatus according to claim 1 , wherein the passive compensation coils are superconducting coils.4. A magnet apparatus according to claim 3 , wherein the passive compensation coils are constructed from a low temperature superconducting material.5. A magnet apparatus according to claim 3 , wherein the passive compensation coils are constructed from a high temperature superconducting material.6. A magnet apparatus according to claim 1 , wherein the helium vessel comprises an outer cylinder and an inner cylinder claim 1 , the outer cylinder having an outer surface and the set of passive compensation coils disposed on the outer surface of the outer cylinder of the helium vessel.7. A magnet apparatus according to claim 1 , wherein the helium vessel comprises an outer cylinder and an inner cylinder claim 1 , the inner cylinder having an outer surface and the set of passive compensation coils disposed on the outer surface ...

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Номер записи: 24
20-06-2013 дата публикации

SYSTEM FOR MAGNETIC FIELD DISTORTION COMPENSATION AND METHOD OF MAKING SAME

Номер: US20130157865A1
Автор: Gronemeyer Benjamin Jacob, HAVENS TIMOTHY JOHN, Jiang Longzhi, Mogatadakala Venkata Kishore, SAHA SAIKAT, Shen Weijun
Принадлежит: GENERAL ELECTRIC COMPANY

A system and method for magnetic field distortion compensation includes a cryostat for a magnetic resonance imaging (MRI) system. The cryostat includes a vacuum casing having a vacuum therein. A cryogen vessel is disposed within the casing, the vessel having a coolant therein. A thermal shield is disposed between the vacuum casing and the cryogen vessel. An eddy current compensation assembly is disposed within the casing. The eddy current compensation assembly includes a plurality of electrically conductive loops formed on one of the vacuum casing, the cryogen vessel, and the thermal shield and constructed to mitigate vibration-induced eddy currents in the MRI system. 1. A cryostat for a magnetic resonance imaging (MRI) system , the cryostat comprising:a vacuum casing having a vacuum therein;a cryogen vessel disposed within the casing, the vessel having a coolant therein;a thermal shield disposed between the vacuum casing and the cryogen vessel; andan eddy current compensation assembly disposed within the casing, the eddy current compensation assembly comprising a plurality of electrically conductive loops formed on one of the vacuum casing, the cryogen vessel, and the thermal shield and constructed to mitigate vibration-induced eddy currents in the MRI system.2. The cryostat of wherein the coolant comprises helium.3. The cryostat of wherein the plurality of electrically conductive loops comprises a non-superconducting material.4. The cryostat of wherein the eddy current compensation assembly further comprises one of aluminum claim 3 , copper claim 3 , and silver.5. The cryostat of wherein the eddy current compensation assembly further comprises copper tape.6. The cryostat of wherein at least one surface of the one of the vacuum casing claim 1 , the cryogen vessel claim 1 , and the thermal shield has a first portion having the plurality of electrically conductive loops formed therein and a second portion free of the plurality of electrically conductive loops; ...

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Номер записи: 25
27-06-2013 дата публикации

MR HF COILS HAVING FLEXIBILITY THAT CAN BE MODULATED

Номер: US20130162252A1
Автор: Heid Oliver
Принадлежит:

The invention relates to a local coil arrangement () for an imaging system (), wherein the local coil arrangement () is rigid in a first state, wherein the local coil arrangement () is flexible is a second state, wherein the local coil arrangement () comprises a reinforcing arrangement (W; S) by which (W; S) the local coil arrangement () can be brought from the flexible state into the rigid state, and by which (W; S) the local coil arrangement () can be brought from the rigid state to the flexible state. 1. A local coil arrangement for an imaging system , wherein the local coil arrangement is rigid in a first state , and wherein the local coil arrangement is flexible in a second state , the local coil arrangement comprising:a reinforcing arrangement, by which the local coil arrangement is transformable from the flexible state into the rigid state, and by which the local coil arrangement is transformable from the rigid state into the flexible state.2. The local coil arrangement as claimed in claim 1 , further comprising elements that are flexible relative to one another claim 1 ,wherein the elements are reinforceable relative to one another.3. The local coil arrangement as claimed in claim 1 , further comprising a plurality of coil elements.4. The local coil arrangement as claimed in claim 1 , further comprising a plurality of coil elements that are arranged in a network configuration.5. The local coil arrangement as claimed in claim 1 , further comprising a plurality of coil elements that rub against one another during a movement relative to one another.6. The local coil arrangement as claimed in claim 1 , further comprising a plurality of coil elements claim 1 , a surface of the plurality of coil elements being toothed.7. The local coil arrangement as claimed in claim 1 , further comprising a plurality of coil elements claim 1 , a contact pressure of the plurality of coil elements being adjustable.8. The local coil arrangement as claimed in claim 1 , wherein a ...

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Номер записи: 26
11-07-2013 дата публикации

NMR Spectrometer and Method of Setting Up the Same

Номер: US20130178367A1
Автор: Hobo Fumio, Suematsu Hiroto, Tanaka Ryoji, Tsuji Shigenori
Принадлежит: JEOL RESONANCE INC.

An NMR spectrometer and method in the following three steps are performed. (1) An external magnetic field is set to H+ΔH (where 4H>0). When the detection coil made of the superconducting material is still in a normal state, a magnetic field stronger than the ultimate target static magnetic field strength Hby ΔH is applied to the detection coil. (2) The detection coil made of the superconducting material is cooled down to Tlower than its critical temperature Tto bring the coil into a superconducting state while the external magnetic field H+ΔH is applied to the detection coil. (3) The external magnetic field is lowered from H+ΔH to Hsuch that the applied external magnetic field is decreased by ΔH while the detection coil is kept in the superconducting state. 1. A method of setting up an NMR spectrometer having: a superconducting magnet system for applying a static magnetic field Hto a sample; an NMR probe for magnetically exciting nuclei under investigation by applying an RF magnetic field to the sample in a direction perpendicular to the static magnetic field H; a detection coil made of a superconducting material , incorporated in the NMR probe , and detecting an NMR signal emanating from the magnetically excited nuclei under investigation; and a cryogenic cooling system for cryogenically cooling the detection coil , enhancing the Q value of the coil , and reducing thermal noise , said method comprising the steps of:{'sub': 0', '0, '(1) setting an external magnetic field to H+ΔH (where ΔH>0) and applying a magnetic field stronger than the ultimate target external static magnetic field strength Hby ΔH to the detection coil when the detection coil made of the superconducting material is still in a normal state;'}{'sub': 0', 'c', '0, '(2) cooling the detection coil made of the superconducting material down to Tlower than its critical temperature Tto bring the coil into a superconducting state while the external magnetic field H+ΔH is applied to the detection coil; and ...

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Номер записи: 27
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.

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Номер записи: 28
18-07-2013 дата публикации

Elastic Antenna System for a Magnetic Resonance Imaging System

Номер: US20130184566A1
Автор: Kreischer Ludwig, Matschl Volker
Принадлежит:

An antenna system for a magnetic resonance imaging system includes a plurality of antenna elements. The antenna elements are arranged in, at, or on support elements. The support elements are constructed so as to be non-expandable and have a constant surface dimension. Adjacent support elements are connected to an expandable connecting element. The dimensions of the connecting element may be changed by the expansion. 1. An antenna system for a magnetic resonance imaging system , the antenna system comprising:a plurality of antenna elements that are connected to support elements that each has a constant surface dimension,wherein adjacent support elements of the support elements are connected by expandable connecting elements.2. The antenna system as claimed in claim 1 , wherein the support elements are constructed so as to be flexibly formable.3. The antenna system as claimed in claim 2 , wherein the support elements are pliable.4. The antenna system as claimed in claim 1 , wherein each of the expandable connecting elements comprises an expandable film.5. The antenna system as claimed in claim 1 , wherein an at least two-dimensionally cohesive network of antenna elements of the plurality of antenna elements is formed with the aid of a plurality of the expandable connecting elements.6. The antenna system as claimed in claim 1 , wherein a substantial portion of the support elements are flat support elements.7. The antenna system as claimed in claim 6 , wherein all of the support elements are flat support elements.8. The antenna system as claimed in claim 1 , wherein the support elements are constructed so as to substantially follow a surface shape of a section of an object to be examined.9. The antenna system as claimed in claim 8 , wherein the support elements have a surface curved in certain sections.10. The antenna system as claimed in claim 1 , further comprising a form fixing element that is constructed to change claim 1 , fix claim 1 , or change and fix an ...

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Номер записи: 29
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.

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Номер записи: 30
08-08-2013 дата публикации

MAGNETIC RESONANCE IMAGING APPARATUS

Номер: US20130200899A1
Автор: CHO Hyug Rae, KIM Joon Soo, KWON Young Cheol, YI Yong Seok
Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

A magnetic resonance imaging apparatus provided with an RF receiver having a power producing module configured to produce power that is to be supplied to the RF receiver through an RF pulse which is applied to a subject from an RF transmitting coil, the magnetic resonance imaging apparatus including an RF receiver provided with an RF transmitting coil configured to apply an RF pulse to a subject to excite an atomic nucleus, and with a power producing module configured to produce power by receiving the RF pulse applied by the RF transmitting coil. 1. A radio frequency (RF) receiver of a magnetic resonance imaging apparatus having a magnet assembly , the RF receiver comprising:an RF receiving coil configured to receive a magnetic resonance signal generated from a subject;an RF amplifier configured to amplify the magnetic resonance signal received from the RF receiving coil; anda power generator configured to generate power by receiving an RF pulse output from an RF coil assembly of the magnet assembly.2. The RF receiver of claim 1 , wherein the power generator is configured to supply the power to the RF amplifier.3. The RF receiver of claim 1 , wherein the power generator comprises:a power coil configured to generate the power by receiving the RF pulse output from the RF coil assembly;a power storage configured to store the power produced from the power coil; anda power supply adjusting part configured to adjust a supply of the power stored in the power storing part.4. The RF receiver of claim 1 , further comprising:a spectrometer configured to perform a digital signal processing on the amplified magnetic resonance signal.5. The RF receiver of claim 4 , wherein the spectrometer comprises:an Analog-Digital (AD) converter configured to convert the amplified magnetic resonance signal into a digital signal; anda processor configured to convert the digital signal into a baseband signal through modulation.6. The RF receiver of claim 5 , wherein the processor is further ...

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Номер записи: 31
15-08-2013 дата публикации

Local Coil System

Номер: US20130211241A1
Автор: Lauer Lars, PAUL DOMINIK, Welsch Götz
Принадлежит:

A local coil system having two loop coils is used for recording, for example, small joints in magnetic resonance tomography. 1. A local coil system for an imaging magnetic resonance tomography (MRT) system , the local coil system comprising:two loop coils.2. The local coil system as claimed in claim 1 , wherein one or more of the two loop coils have a diameter of less than six cm.3. The local coil system as claimed in claim 1 , wherein one or more of the two loop coils have a diameter of less than four cm.4. The local coil system as claimed in claim 1 , wherein the two loop coils each have a circular antenna surrounding a recess in the respective loop coils.5. The local coil system as claimed in claim 4 , wherein one or more of the two loop coils have a diameter of less than six cm.6. The local coil system as claimed in claim 4 , wherein one or more of the two loop coils have a diameter of less than four cm.7. The local coil system as claimed in claim 1 , wherein the local coil system is a joint-MRT-recording local coil system configured to record a small joint of an object to be examined claim 1 , the small joint measuring less than three cm in diameter.8. The local coil system as claimed in claim 1 , wherein the local coil system is a joint-MRT-recording local coil system configured to record a finger joint of an object to be examined.9. The local coil system as claimed in claim 1 , wherein in the local coil system is an metacarpophalangeal (MCP)-joint local coil system configured for MRT imaging on an MCP finger joint.10. The local coil system as claimed in claim 1 , wherein during MRT imaging the two loop coils of the local coil system are arranged such that a region of an object to be examined is located there between.11. The local coil system as claimed in claim 1 , wherein during MRT imaging the two loop coils of the local coil system are arranged such that a joint of an object to be examined is located there between.12. The local coil system as claimed in ...

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Номер записи: 32
22-08-2013 дата публикации

Method of Reducing Multipole Content In A Conductor Assembly During Manufacture

Номер: US20130212872A1
Автор: Rainer Meinke
Принадлежит: Individual

A method for manufacture of a conductor assembly. The assembly is of the type which, when conducting current, generates a magnetic field or in which, in the presence of a changing magnetic field, a voltage is induced. In an example embodiment one or more first coil rows are formed. The assembly has multiple coil rows about an axis with outer coil rows formed about inner coil rows. A determination is made of deviations from specifications associated with the formed one or more first coil rows. One or more deviations correspond to a magnitude of a multipole field component which departs from a field specification. Based on the deviations, one or more wiring patterns are generated for one or more second coil rows to be formed about the one or more first coil rows. The one or more second coil rows are formed in the assembly. The magnitude of each multipole field component that departs from the field specification is offset

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Номер записи: 33
29-08-2013 дата публикации

Magnetic Resonance Signal Detection Using Remotely Positioned Receive Coils

Номер: US20130221966A1
Автор: Haoqin Zhu, John Saunders, Labros Petropoulos, Mehran Fallah-Rad, Michael Lang, Wayne Schellekens
Принадлежит: Imris Inc USA

The receive coil arrangement includes an inner local volume coil adjacent the part to be imaged so as to maximize the received MR signal and an outer coil, which may be the built in body coil of the magnet, connected by cable to the signal processing system. Both the coils are individually tuned to the common resonant frequency and the local volume coil include an arrangement to halt current flow therein during the transmit stage. The local volume coil has no cable and is arranged to communicate the MR signal therein to the signal processing system through the outer coil by inductive coupling to the outer coil. Despite inherent losses by interfering with the tuning of the loops and in the inductive coupling this magnifies the MR signal and makes the local volume coil wireless.

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Номер записи: 34
29-08-2013 дата публикации

Radio Frequency Coil Device and Magnetic Resonance Imaging Apparatus

Номер: US20130221967A1
Автор: Li Weng Ming, Li Zhi Bin, Wang Jian Min, Wang Lan
Принадлежит:

An RF coil device and an MM apparatus allowing a connection relationship between input RF channels and output RF channels to be controlled by a smaller number of switch elements are provided. The RF coil device includes multiple coil segments and a multi-selection switch. Input terminals of the multi-selection switch are each connected to a different coil segment. An output terminal of the multi-selection switch leads to an RF output channel. A control terminal of the multi-selection switch is used to receive a control signal so as to select a coil segment for connection to the output terminal. Multiple coil segments connected to the input terminals are not in consecutive positions, and the number of coil segments by which any two of the multiple coil segments are spaced apart is no fewer than the maximum number of coil segments required for one MRI imaging less 1. The MRI apparatus includes the RF coil device. 1. A radio frequency coil device comprising:multiple coil segments; andat least one multi-selection switch, multiple input terminals of each multi-selection switch of the at least one multi-selection switch being connected to a different one of the coil segments, a control terminal of the multi-selection switch operable to receive a control signal so as to select an input terminal of the multiple input terminals for connection to an output terminal of the multi-selection switch,wherein the multiple coil segments connected to multiple input terminals of one multi-selection switch are not in consecutive positions.2. The radio frequency coil device as claimed in claim 1 , wherein the number of coil segments by which any two coil segments of the multiple coil segments are spaced apart is no fewer than the maximum number of coil segments required for one MRI imaging less 1.3. The radio frequency coil device as claimed in claim 1 , wherein the coil segments comprise one coil element.4. The radio frequency coil device as claimed in claim 1 , wherein the coil ...

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Номер записи: 35
29-08-2013 дата публикации

ANTENNA DEVICE AND MAGNETIC RESONANCE IMAGING DEVICE

Номер: US20130221968A1
Автор: Bito Yoshitaka, Dohata Masayoshi, Habara Hideta, Ochi Hisaaki, Soutome Yoshihisa, Takahashi Tetsuhiko, Takeuchi Hiroyuki
Принадлежит:

There is provided a technique for suppressing increase of SAR without sacrificing sensitivity in RF coils used in MRI apparatuses. The present invention provides an antenna device comprising a sheet-shaped conductor and a ribbon-shaped conductor disposed on the subject side with respect to the sheet-shaped conductor with a predetermined distance from the sheet-shaped conductor. The ribbon-shaped conductor has a meandering shape, and is adjusted so as to resonate at transmission and reception frequencies, and it is constituted so that distance to the sheet-shaped conductor becomes smaller at both end part thereof along the static magnetic field direction compared with the distance to the sheet-shaped conductor at the center thereof. Moreover, the ribbon-shaped conductor is constituted so as to have a smaller width, as the distance to the sheet-shaped conductor becomes smaller. 1. An antenna device used for at least one of transmission and reception of a radio frequency signal , comprising:a sheet-shaped conductor;M (M is an integer of 1 or larger) of ribbon-shaped conductor or conductors each comprising N (N is an integer of 1 or larger) of meander conductor or conductors disposed with a predetermined space from the sheet-shaped conductor and having a meandering shape;capacitor or capacitors disposed at one or more gaps provided in each meander conductor so as to connect portions of meander conductor divided by the gaps in series; andM of connection unit each connected to the capacitor or one of the capacitors in parallel in each ribbon-shaped conductor,wherein each meander conductor has:a central conductor; andend conductors disposed on both sides of the central conductor,when N is 2 or larger, one end of each meander conductor is connected to one end of adjacent meander conductor so that the meander conductors constitute one string-shaped ribbon-shaped conductor as a whole,space between each end conductor and the sheet-shaped conductor is smaller than space between ...

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Номер записи: 36
05-09-2013 дата публикации

Cylindrical Gradient Coil Arrangement for a Magnetic Resonance Device

Номер: US20130229183A1
Автор: Kimmlingen Ralph, Krug Andreas
Принадлежит:

A cylindrical gradient coil arrangement is provided for a magnetic resonance device. The arrangement includes at least one conductive structure that forms at least one gradient coil and a cooling device that uses a cooling fluid to cool the at least one conductive structure. The arrangement includes an outer carrier structure and an inner carrier structure. The outer carrier structure includes two tubular, coaxial outer sections with different diameters. The inner, tubular carrier structure is arranged between and coaxially with the outer sections. The conductive structure is placed on the inner carrier structure. The inner carrier structure is spaced from the outer sections by a clearance. The clearance forms a cooling channel through which the cooling fluid of the cooling device may flow. The inner carrier structure is fastened to the outer carrier structure at least in a point-by-point manner. 1. A cylindrical gradient coil arrangement for a magnetic resonance device , the cylindrical gradient coil arrangement comprising:at least one conductive structure that forms at least one gradient coil;a carrier apparatus carrying the at least one conductive structure, the carrier apparatus comprising an outer carrier structure and an inner, tubular carrier structure; anda cooling device operable to use a cooling fluid to cool the at least one conductive structure,wherein the outer carrier structure comprises two tubular, coaxial outer sections having different diameters,wherein the inner, tubular carrier structure is arranged coaxially to the outer sections between the outer sections and spaced apart from the outer sections by a clearance, the conductive structure being placed on the inner carrier structure, andwherein the clearance forms a cooling channel through which the cooling fluid of the cooling device is flowable, and the inner carrier structure is fastened to the outer carrier structure at least in a point-by-point manner.2. The cylindrical gradient coil ...

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Номер записи: 37
12-09-2013 дата публикации

Radio Frequency Coil Device and Magnetic Resonance Imaging System

Номер: US20130234714A1
Автор: Li Wen Ming, Liu Yu Ye, Wang Jian Min
Принадлежит:

An RF coil device and an MRI system are provided. The RF coil device includes m coil elements, where m is an integer greater than 1. The RF coil device also includes an RF switch control unit including n output terminals and m input terminals connected to the m coil elements, respectively, where n is an integer greater than or equal to 1 and less than m. The RF coil device includes a decoder for outputting a control signal to the RF switch control unit according to a received control command. The RF switch control unit connects each of not more than n input terminals to a different output terminal according to the control signal. 1. A radio frequency coil device comprising:m coil elements, wherein m is an integer greater than 1;an RF switch control unit comprising n output terminals and m input terminals connected to the m coil elements, respectively, wherein n is an integer greater than or equal to 1 and less than m; anda decoder operable to output a control signal to the RF switch control unit according to a received control command,wherein the RF switch control unit connects each n of less input terminals to a different output terminal according to the control signal.2. The radio frequency coil device as claimed in claim 1 , wherein the decoder is connected to n on/off control lines and is operable to receive control commands from the n on/off control lines.3. The radio frequency coil device as claimed in claim 1 , wherein the decoder is connected to fewer than n on/off control lines and is operable to receive control commands from the on/off control lines.4. The radio frequency coil device as claimed in claim 3 , wherein the control command comprises a clock command and configuration data claim 3 , andwherein the decoder is operable to:enter an active state or a sleep state according to the clock command, received from one of the on/off control lines; andreceive the configuration data according to one or more other on/off control lines of the on/off control ...

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Номер записи: 38
19-09-2013 дата публикации

Magnetic Resonance Tomograph with Cooling Device for Gradient Coils

Номер: US20130241558A1
Автор: Schuster Johann, STOCKER STEFAN
Принадлежит:

A magnetic resonance tomography device includes at least three coil layers. The at least three coil layers are each operable to generate a gradient magnetic field in one of three directions. One cooling layer is arranged between a first and a second of the at least three coil layers. Another cooling layer is arranged between the second and a third of the at least three coil layers. 1. A magnetic resonance tomography device comprising:three coil layers, each coil layer of the three coil layers operable to generate a gradient magnetic field in a direction;a first cooling layer arranged between a first coil layer of the three coil layers and a second coil layer of the three coil layers; anda second cooling layer arranged between the second coil layer and a third coil layer of the three coil layers.2. The magnetic resonance tomography device as claimed in claim 1 , wherein the first cooling layer and the second cooling layer are cooling layers with cooling elements.3. The magnetic resonance tomography device as claimed in claim 2 , wherein the cooling elements comprise cooling hoses.4. The magnetic resonance tomography device as claimed in claim 1 , wherein the first cooling layer claim 1 , the second cooling layer claim 1 , or the first cooling layer and the second cooling layer comprise cooling elements including cooling hoses filled with a coolant.5. The magnetic resonance tomography device as claimed in claim 1 , wherein the first cooling layer claim 1 , the second cooling layer claim 1 , or the first cooling layer and the second cooling layer comprise cooling elements including cooling hoses claim 1 , the cooling hoses each being connected to a pump and a cooling unit.6. The magnetic resonance tomography device as claimed in claim 1 , further comprising gradient coils arranged in the three coil layers.7. The magnetic resonance tomography device as claimed in claim 1 , further comprising gradient coils arranged in the three coil layers claim 1 , each of the gradient ...

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Номер записи: 39
10-10-2013 дата публикации

Mri guidewire

Номер: US20130267831A1
Автор: Ozgur Kocaturk
Принадлежит: US Department of Health and Human Services

A guidewire ( 100 ) for use with interventional magnetic resonance imaging has a guidewire body ( 102 ) having a distal end and a proximal end and reserving a space therein, a dipole antenna ( 108 ) disposed in the space reserved within the guidewire body, the dipole antenna being adapted to be electrically connected to a signal processing system through a first signal channel ( 110 ) through the proximal end of the guidewire body, and a loop antenna ( 112 ) disposed in the space reserved within the guidewire body toward the distal end of the guidewire body, the loop antenna ( 112 ) being adapted to be electrically connected to the signal processing system through a second signal channel ( 114 ) through the proximal end of the guidewire body. The dipole antenna and the loop antenna are each constructed to receive magnetic resonance imaging signals independently of each other and to transmit received signals through the first and second signal channels, respectively, to be received by the signal processing system. An interventional magnetic resonance imaging system includes an active guidewire.

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Номер записи: 40
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 ...

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Номер записи: 41
31-10-2013 дата публикации

System and Method for Control of RF Circuits for Use With an MRI System

Номер: US20130285659A1
Автор: Gopinath Anand, Sohn Sung-Min, Vaughan John Thomas
Принадлежит:

A system and method for automatically adjusting electrical performance of a radio frequency (RF) coil assembly of a magnetic resonance imaging (MRI) system during a medical imaging process of a subject to control changes in loading conditions of the RF coil caused by the subject during the medical imaging process. 1. A radio-frequency (RF) system for use with a magnetic resonance imaging (MRI) system during a imaging process of a subject , the RF system comprising:a radio frequency (RF) element configured to at least one of transmit RF energy to and receive RF energy from the subject during the medical imaging process;an array of reactive components coupled to the RF element and configured to adjust at least one of an impedance transformation and a frequency tuning associated with the RF element;a mismatch detector circuit configured to measure a reflected signal from the RF element; anda feedback circuit configured to receive an indication of the reflected signal from the mismatch detector circuit and automatically determine at least one of an impedance adjustment and a frequency tuning to be implemented by adjusting the array of reactive components based on the reflected signal.2. The system of wherein the mismatch detector includes a directional coupler configured to sense the reflected signal.3. The coil assembly of further comprising a control system configured to receive the at least one of the impedance adjustment and the frequency tuning from the feedback circuit and change a total reactance of the array of reactive components based thereon.4. The system of further comprising a diode driver system configured to be controlled by the control system to change the total reactance of the array of reactive components.5. The system of wherein the array of reactive components forms part of a Pi matching circuit.6. A method for automatically controlling operation of a radio frequency (RF) element for use with a magnetic resonance imaging (MRI) system claim 1 , the ...

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Номер записи: 42
14-11-2013 дата публикации

MR Antenna With Compensation for Variable Distance to Shield

Номер: US20130300418A1
Автор: Eberler Ludwig, Nistler Jürgen, Vester Markus
Принадлежит:

A whole-body coil for a magnetic resonance tomography device includes one or more compensation capacitors between a high-frequency antenna and an RF shield. The one or more compensation capacitors each have variable capacitance caused by a variation in a distance of the RF shield to the high-frequency antenna. 1. A whole-body coil for a magnetic resonance tomography device , the whole-body coil comprising:one or more compensation capacitors between a high-frequency antenna and an RF shield,wherein each of the one or more compensation capacitors has a variable capacitance caused by a variation in a distance of the RF shield to the high-frequency antenna.2. The whole-body coil as claimed in claim 1 , wherein the RF shield is arranged on a gradient coil claim 1 , mounted on the gradient coil claim 1 , fixed to the gradient coil claim 1 , or a combination thereof claim 1 , andwherein the distance of the RF shield to the high-frequency antenna varies during expansion of the gradient coil.3. The whole-body coil as claimed in claim 1 , wherein the one or more compensation capacitors are each configured as a plate capacitor.4. The whole-body coil as claimed in claim 1 , wherein the one or more compensation capacitors are each configured as a plate capacitor claim 1 ,wherein plates of the plate capacitor have a distance to one another, the distance in each case being variable by expansion of the gradient coil, by distance variation of the distance of the RF shield to an element of the high-frequency antenna, or a combination thereof.5. The whole-body coil as claimed in claim 1 , wherein the one or more compensation capacitors comprise a plurality of compensation capacitors claim 1 ,wherein each compensation capacitor of the plurality of compensation capacitors has a number of varying capacitances with a number of varying distances, in a plurality of regions, from a gradient coil that is expandable as a result of heating to the high-frequency antenna.6. The whole-body coil as ...

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Номер записи: 43
28-11-2013 дата публикации

MULTI-CHANNEL COIL ARRANGEMENT

Номер: US20130314088A1
Автор: Brown Ryan, Wiggins Graham Charles
Принадлежит: New York University

A multi-frequency coil array arrangement can be provided. For example, a plurality of radio frequency coil arrangements can have a first coil arrangement(s) resonant at a single first frequency and a second coil arrangement(s) resonant at a single second frequency which is lower than the first frequency 1. A multi-frequency coil array arrangement , comprising:a plurality of radio frequency (RF) coil arrangements having at least one first coil arrangement resonant at a single first frequency and at least one second coil arrangement resonant at a single second frequency which is lower than the first frequency.2. The coil array arrangement of claim 1 , wherein each of the RF coils includes at least one receive element which is located at or near a target object.3. The coil array arrangement of claim 2 , wherein the at least one receive element for the at least one first RF coil arrangement is located at substantially a same distance from the target object as the at least one receive element for the at least one second RF coil arrangement claim 2 , and wherein the at least one receive element for the at least one first RF coil arrangement is located at least one of within or interspersed with the at least one receive element for the at least one second RF coil arrangement so as to substantially avoid shielding by the at least one receive element of the at least one second RF coil arrangement.4. The coil array arrangement of claim 3 , further comprising:at least one excitation structure resonant only at the second frequency configured to receive a signal generated by the RF coil arrangements.5. The coil array arrangement of claim 4 , wherein the at least one excitation structure is an encircling volume coil structure.6. The coil array arrangement of claim 5 , wherein the encircling volume coil structure is at least one of (i) a birdcage (i) a Transverse Electro-Magnetic array (TEM) or (iii) an array of excitation coils.7. The coil array arrangement of claim 4 , wherein ...

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Номер записи: 44
05-12-2013 дата публикации

Adaptable sheet of coils

Номер: US20130320982A1
Автор: Christopher Judson Hardy, Selaka Bandara Bulumulla, Thomas Kwok-Fah Foo
Принадлежит: General Electric Co

An imaging system is presented. The imaging system includes a storage structure that stores a first sheet of coils inside a cradle, wherein the storage structure includes a plurality of first set of rotatable bodies and a plurality of second set of rotatable bodies, and a plurality of springs that are coupled to one or more of the plurality of second set of rotatable bodies, wherein the first sheet of coils is disposed around the plurality of first set of rotatable bodies, the plurality of second set of rotatable bodies and the plurality of springs, and wherein a first end of the first sheet of coils protrudes out of the cradle.

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Номер записи: 45
12-12-2013 дата публикации

Coil System for a Magnetic Resonance Tomography System

Номер: US20130331269A1
Автор: Oomen Marijn Pieter, Rehner Robert, Van Hasselt Peter
Принадлежит:

A coil system for a magnetic resonance tomography system includes a plurality of coils for sending and/or receiving high-frequency signals. The plurality of coils is disposed in a receiving chamber between a tomography magnet and a lining of an opening in the tomography magnet and may be cooled by a cooling apparatus. When the coil system is in an operating state, the receiving chamber is filled with a cryogenic cooling medium. 1. A coil system for a magnetic resonance tomography system , the coil system comprising:a plurality of coils operable to send, receive, or send and receive high-frequency signals, the plurality of coils being disposed in a receiving chamber between a tomography magnet and a lining of an opening in the tomography magnet and being coolable by a cooling apparatus,wherein when the coil system is in an operating state, the receiving chamber is filled with a cryogenic cooling medium.2. The coil system as claimed in claim 1 , wherein the plurality of coils are made from a high-temperature superconductor.3. The coil system as claimed in claim 2 , wherein the high-temperature superconductor comprises yttrium barium copper oxide.4. The coil system as claimed in claim 1 , further comprising a preamplifier disposed in the receiving chamber claim 1 , the preamplifier being assigned to at least one coil of the plurality of coils.5. The coil system as claimed in claim 1 , wherein the plurality of coils are coupled inductively to respectively assigned transmitter apparatuses claim 1 , receiver apparatuses claim 1 , or transmitter and receiver apparatuses that are disposed outside the receiving chamber.6. The coil system as claimed in claim 1 , wherein the cryogenic cooling medium comprises liquid nitrogen claim 1 , helium or neon.7. The coil system as claimed in claim 1 , wherein the receiving chamber is enclosed by a vacuum jacket.8. The coil system as claimed in claim 7 , wherein an insulator is disposed in the vacuum jacket.9. The coil system as claimed ...

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Номер записи: 46
19-12-2013 дата публикации

DISTRIBUTED CAPACITANCE RADIO FREQUNCY (RF) COIL AND MAGNETIC RESONANCE IMAGING SYSTEM INCLUDING THE SAME

Номер: US20130335086A1
Автор: Becerra Ricardo, Edwards Michael P., Fujimoto Masahiro, Shah Bijay, Xie Zhentian
Принадлежит: GENERAL ELECTRIC COMPANY

A radio frequency (RF) birdcage coil includes a first distributed capacitance end ring, a second distributed capacitance end ring, and a plurality of rungs connected between the first and second end rings, wherein at least one of the first and second distributed capacitance end rings includes a substrate having a first side and a second side, a first plurality of conductors formed on the first side, a second plurality of conductors formed on the second side, and an insulating material deposited on the first side such that the insulating material substantially covers the first plurality of conductors. 1. A radio frequency (RF) birdcage coil comprising:a first distributed capacitance end ring;a second distributed capacitance end ring; anda plurality of rungs connected between the first and second distributed capacitance end rings, wherein at least one of the first and second distributed capacitance end rings includes a substrate having a first side and a second side, a first plurality of conductors formed on the first side, a second plurality of conductors formed on the second side, and an insulating material deposited on the first side such that the insulating material substantially covers the first plurality of conductors.2. The RF birdcage coil of claim 1 , further comprising a second insulating material deposited on the second side and substantially covers the second plurality of conductors.3. The RF birdcage coil of claim 1 , wherein the first plurality of conductors are each separated by a gap claim 1 , the insulating material being deposited in the gaps.4. The RF birdcage coil of claim 1 , wherein the first plurality of conductors are offset from the second plurality of conductors.5. The RF birdcage coil of claim 1 , further comprising a second insulating material being deposited onto the second side.6. The RF birdcage coil of claim 1 , wherein the insulating material comprises a dielectric material.7. The RF birdcage coil of claim 1 , wherein the RF birdcage ...

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Номер записи: 47
02-01-2014 дата публикации

Local Coil for Magnetic Resonance Imaging System

Номер: US20140005525A1
Автор: Yan Hong Chen, Zeng He He
Принадлежит: SIEMENS AG

A local coil includes a body portion. The body portion includes an inner conductor layer. The local coil further includes at least one elastic wing. The body portion and the at least one elastic wing form an accommodating space for accommodating a body part to be inspected.

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Номер записи: 48
09-01-2014 дата публикации

REDUCTION OF PEAK ELECTRICAL POWER CONSUMPTION IN MAGNETIC RESONANCE IMAGING SYSTEMS

Номер: US20140009151A1
Автор: Van Helvoort Marinus Johannes Adrianus Maria
Принадлежит: KONINKLIJKE PHILIPS N.V.

A magnetic resonance imaging system () with magnetic field gradient coils () and a gradient coil power supply (). The magnetic resonance imaging system further comprises a processor () and a chiller () for providing the coolant to the gradient coils. The magnetic resonance imaging system further comprises a memory () for storing machine executable instructions (). The instructions cause the processor to receive () a pulse sequence (), to generate () the chiller control signals using the pulse sequence and a chiller thermal model () of the gradient coils and the coolant reservoir, and to send () the chiller control signals to the chiller. The chiller control signals cause the chiller to halt chilling at least a portion of the time when the gradient coil power supply supplies current to the magnetic field gradient coils. 1. A magnetic resonance imaging system comprising:a set of magnetic field gradient coils;a gradient coil power supply for supplying the set of magnetic field gradient coils with electrical current;a chiller having the function to chill coolant in a coolant reservoira processor having the function to control the chiller;wherein the chiller is adapted for providing the coolant at least to the set of magnetic field gradient coils, wherein the chiller is adapted for receiving chiller control signals from the processor and the chiller is controlled by way of the chiller control signals; receive a pulse sequence;', 'generate the chiller control signals using the pulse sequence and a chiller thermal model of the gradient coils and the coolant reservoir, wherein the chiller control signals cause the chiller to halt chilling the coolant independently of the temperature of the gradient coils and for at least a portion of the time when the gradient coil power supply supplies current to the set of magnetic field gradient coils; and', 'send the chiller control signals to the chiller., 'a memory for storing machine executable instructions, wherein execution of the ...

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Номер записи: 49
16-01-2014 дата публикации

MAGNETIC FIELD GENERATION DEVICE WITH ALTERNATIVE QUENCH DEVICE

Номер: US20140018243A1
Автор: Gross Patrick
Принадлежит:

A magnetic field generation device for a magnetic resonance tomography apparatus has a vacuum container that encloses a magnetic coil made of superconducting material, and a conduit of a pipe system is connected with the magnetic coil so as to conduct heat. The pipe system and the conduit are filled with a coolant that places the magnetic coil in a superconducting state during normal operation of the tomography system. A valve connects the pipe system to the interior of a capture container. In the event of non-normal operation, such as a quench, evaporated coolant passes through the valve into the capture container. 1. A magnetic field generation device for a magnetic resonance tomography apparatus , said magnetic field generation device comprising:a vacuum container that generates a vacuum inside of the vacuum container;at least one magnetic coil made of superconducting material that is enclosed by said vacuum container;a pipe system comprising at least one conduit in heat-transferring communication with said magnetic coil, said conduit containing a liquid coolant therein that places said superconducting material in a superconducting state during a normal operating condition of said magnetic resonance tomography apparatus, and at least a portion of said liquid coolant transitioning to a gas in a non-normal operating state of said magnetic resonance tomography apparatus;a capture container; anda valve connected with said pipe system that regulates passage of said gas between said pipe system and an interior of said capture container.2. A magnetic field generation device as claimed in wherein said capture container is formed by said vacuum container.3. A magnetic field generation device as claimed in wherein said magnetic coil is formed in a coil winding claim 1 , and wherein said at least one conduit proceeds along said coil winding.4. A magnetic field generation device as claimed in comprising a pressure sensor in said pipe system that causes said valve to open ...

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Номер записи: 50
23-01-2014 дата публикации

Gradient Coil with Precisely Positioned Coil Windings

Номер: US20140021955A1
Автор: Fath Sascha, Riegler Jörg, Schön Lothar, Schuster Johann, STOCKER STEFAN
Принадлежит:

A method for producing at least one saddle coil for a gradient coil layer for a magnetic resonance tomography system is provided. At least one half cylinder-shaped, premolded saddle coil is arranged between an inner shell and an outer shell of a casting apparatus. The shells of the casting apparatus are closed, and the space between the shells is filled with a casting compound. 1. A method for producing at least one saddle coil for a gradient coil layer for a magnetic resonance tomography (MRT) system , the method comprising:arranging the at least one saddle coil for the gradient coil layer for the MRT system between an inner shell and an outer shell of a casting apparatus, the at least one saddle coil being half cylinder-shaped and premolded;closing the inner shell and the outer shell of the casting apparatus; andfilling space between the inner shell and the outer shell with a casting compound.2. The method as claimed in claim 1 , wherein the closing comprises closing the inner shell and the outer shell of the casting apparatus under pressure.3. The method as claimed in claim 1 , wherein the at least one saddle coil or the gradient coil assumes a shape of an arc between the inner shell and the outer shell.4. The method as claimed in claim 1 , wherein filling comprises filling with a resin as the casting compound.5. The method as claimed in claim 4 , wherein filling comprises filling with a reaction resin molding material as the resin.6. The method as claimed in claim 1 , further comprising casting under vacuum.7. The method as claimed in claim 1 , further comprising hardening the casting compound with a closed casting apparatus claim 1 , with an increase in temperature during hardening compared with filling claim 1 , or a combination thereof.8. The method as claimed in claim 1 , further comprising hardening the casting compound with the closed casting apparatus claim 1 , wherein the closed casting apparatus is opened after hardening the casting compound.9. The ...

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Номер записи: 51
30-01-2014 дата публикации

FAIL-SAFE AND EASY ACCESS LOCK FOR MRI RECEIVER COIL

Номер: US20140028317A1
Автор: Friman Olli Tapio
Принадлежит: KONINKLIJKE PHILIPS N.V.

A local radio frequency (RF) coil assembly (A) defining a pediatric patient receiving region () to be mounted to a patient support table (B) of an MRI scanner (E). The local RF coil assembly (A) includes a rigid coil body () operatively connected to an adjustable coil part () along a hinge axis (). A carrier (F) is configured to receive a pediatric patient (C) and be positioned into engagement with the local RF coil assembly (A). An interlock assembly () holds the adjustable coil part () in a selected position () when the carrier (F) interacts with the adjustable coil part (). At least one bearing () is configured to pivot and bias the adjustable coil part () relative to the carrier (F) and gravity bias the interlock assembly and the carrier (F) into an interlocking engagement. The adjustable coil part () is gravity biased to the open position () when the carrier (F) is removed. 1. A local radio frequency coil assembly adapted to receive an associated patient to be scanned in a magnetic resonance imaging scanner , the assembly comprising:a patient carrier;a head coil defining a pediatric patient receiving region which receives the carrier;a posterior coil attached to the head coil and is configured to be mounted to a patient support table of the magnetic resonance imaging scanner;an anterior body coil pivotally mounted to the head coil by a hinge element to pivot between an open position and a selected position above a portion of the carrier;an interlock assembly which holds the anterior body coil in the selected position; anda biasing arrangement which biases a ratchet element of the interlock assembly into engagement with the carrier.226. The local RF coil assembly according to wherein the biasing arrangement includes at least one bearing that operably connects the body coil to the head coil along a hinge axis ().351. The local RF coil assembly according to wherein at least one bearing operably connects the body coil to the head coil along a sloping surface such ...

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Номер записи: 52
06-02-2014 дата публикации

MR Surface Coil with Integrated Automatic Patient Immobilization

Номер: US20140039301A1
Автор: Daniel Driemel
Принадлежит: SIEMENS AG

A magnetic resonance tomography (MRT) local coil includes at least two parts that may be moved relative to one another. At least one part of the at least two parts has elements that, in a closed state of the MRT local coil, presses directly or via pressure elements on at least one closed volume area in another part of the at least two parts. The at least one closed volume area is displaced by this in the closed state of the local coil into a coil interior space inside the local coil until the closed volume area rests against a patient.

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Номер записи: 53
20-02-2014 дата публикации

RESONANT MAGNETIC RING ANTENNA

Номер: US20140049259A1
Автор: BALEINE Clara, Drake Christina, Poon Nelson
Принадлежит: LOCKHEED MARTIN CORPORATION

A resonant magnetic ring antenna which includes a dielectric substrate having opposing first and second sides, a first and second ring elements disposed upon the opposing first and second sides of the substrate in a corresponding location, the first and second ring elements each comprising a trace having a spiral configuration with an outer radius, an inner radius, a spacing, and a number of turns, the resonant magnetic ring antenna being configured to concentrate radio frequency (RF) electromagnetic fields over a controlled volume at a specified distance from an imaging device in which it is incorporated. 1. A resonant magnetic ring antenna , comprising:a dielectric substrate having opposing first and second sides;a first ring element disposed upon the first side of the substrate, the first ring element comprising a trace having a spiral configuration with an outer radius, an inner radius, a spacing, and a number of turns;a second ring element disposed upon the second side of the substrate, the second ring element comprising a trace having a spiral configuration with an outer radius, an inner radius, a spacing, and a number of turns; andwherein the resonant magnetic ring antenna is configured to concentrate radio frequency (RF) electromagnetic fields over a controlled volume at a specified distance from an imaging device in which it is incorporated.2. The resonant magnetic ring antenna of claim 1 , wherein the resonant magnetic ring antenna is overlayed upon a matematerial (MM) Lens.3. The resonant magnetic ring antenna of claim 2 , wherein the MM Lens is isotropic.4. The resonant magnetic ring antenna of claim 2 , wherein the MM lens includes a periodic array of subwavelength cubic unit cells claim 2 , each cubic unit cell including a conducting loop and capacitor on each of six inner faces.5. The resonant magnetic ring antenna of claim 4 , wherein the capacitors on loops disposed on opposing sides of a cubic unit cell are disposed on alternate sides of their ...

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Номер записи: 54
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 ...

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Номер записи: 55
27-02-2014 дата публикации

MULTICHANNEL RF VOLUME RESONATOR FOR MRI

Номер: US20140055136A1
Автор: Findeklee Christian, Leussler Christoph, Mens Wilhelmus Reinerius Maria
Принадлежит: KONINKLIJKE PHILIPS ELECTRONICS N.V.

Abstract: An RF volume resonator system is disclosed comprising a multi-port RF volume resonator (), like e.g. a TEM volume coil or TEM resonator, or a birdcage coil, all of those especially in the form of a local coil like a head coil, or a whole body coil, and a plurality of transmit and/or receive channels (T/RCh . . . T/RCh) for operating the multi-port RF volume resonator for transmitting RF excitation signals and/or for receiving MR relaxation signals into/from an examination object or a part thereof. By the individual selection of each port (P . . . P) and the appropriate amplitude and/or frequency and/or phase and/or pulse shapes of the RF transmit signals according to the physical properties of an examination object, a resonant RF mode within the examination object with an improved homogeneity can be excited by the RF resonator. 1. RF volume resonator system for use in an MR imaging system , the RF volume resonator system comprising:a multi-port RF volume resonator comprising a plurality of ports which are positioned at the resonator for exciting and/or receiving RF/MR signals by means of transmit and/or receive channels, characterized in:that a plurality of transmit and/or receive channels is provided which each at least comprise an ON/OFF switch for connecting and disconnecting each one transmit and/or receive channel with/from each one of the ports by switching the related ON/OFF switch between an ON and an OFF state, respectively, wherein the ON/OFF switches can be switched between the ON and the OFF state independently from each other by means of each an individual switch signal, anda control unit for generating the switch signals, for selecting at least two of the ports of the RF resonator for connecting with each one of the transmit and/or receive channels for exciting and/or receiving RF/MR signals for conducting an MR imaging of an examination object.2. RF volume resonator system according to claim 1 , wherein each of the plurality of transmit and/ ...

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Номер записи: 56
27-02-2014 дата публикации

NMR Detection Module

Номер: US20140055138A1
Автор: MIZUNO TAKASHI, Takegoshi Kiyonori
Принадлежит:

An NMR (nuclear magnetic resonance) detection module (such as an NMR probe) mounted in a vacuum vessel permits a transmit/receive coil to be cooled efficiently and to be placed closer to a sample container. The NMR detection module includes a core module (detection module) () consisting of a refrigerant block () and a transmit/receive coil formed on the inner surface of a detection hole (). A sleeve (cylindrical partition wall) () forming a part of the vacuum vessel is inserted in the detection hole (). A sample tube () is inserted in the sleeve (). The refrigerant block () is connected to a heat exchanger via a support member (). Since it is not necessary to form a bobbin inside the transmit/receive coil, the distance between the coil and the sample can be set small. The coil is entirely surrounded by the refrigerant block. 1. An NMR detection module for detecting a magnetic resonance signal emanating from a sample , the detection module being mounted in a vacuum vessel that is inserted in a static magnetic field generator , said NMR detection module comprising:a cooling block made of a heat conducting material thermally coupled to a cooling source that is placed in the vacuum vessel, the cooling block being provided with a detection hole in which a sample container is inserted; anda detection coil mounted on an inner surface of the detection hole and surrounded and cooled by the cooling block.2. The NMR detection module as set forth in claim 1 ,wherein said sample is a solid sample,wherein said detection hole has a central axis tilted at a given angle to the direction of a static magnetic field,wherein a cylindrical partition wall forming a part of said vacuum vessel is disposed in said detection hole out of contact with the detection coil, andwherein a vacuum layer is formed between the detection coil and the cylindrical partition wall.3. The NMR detection module as set forth in claim 2 , wherein said cooling block has a front-end portion containing said ...

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Номер записи: 57
27-02-2014 дата публикации

Shoulder Coil and Transmitting Coil for Magnetic Resonance System

Номер: US20140058250A1
Автор: Jian Min Wang, Shu Du, TONG Tong, Wen Ming Li, Zeng He He
Принадлежит: Individual

A shoulder coil for a magnetic resonance system includes a receiving part. The shoulder coil also includes a transmitting part used for coupling a radio-frequency magnetic field of a body coil of the magnetic resonance system.

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Номер записи: 58
27-03-2014 дата публикации

MRI Scanner

Номер: US20140084917A1
Автор: Dewdney Andrew
Принадлежит:

A magnetic resonance imaging (MRI) scanner includes a control device, a gradient coil for generating a gradient field, a gradient coil connector for connecting the gradient coil to the control device, and a temperature sensor. The temperature sensor is configured and disposed to detect a temperature of the gradient coil connector. 1. A magnetic resonance imaging (MRI) scanner comprising:a control device;{'b': '0', 'a B coil arrangement;'}{'b': '1', 'a B coil arrangement;'}a cooling device for cooling components of the MRI scanner; anda temperature sensor,wherein the temperature sensor is configured and disposed to detect a temperature of a not directly cooled component of the MRI scanner.2. The MRI scanner as claimed in claim 1 , further comprising:a gradient coil for generating a gradient field; anda gradient coil connector for connecting the gradient coil to the control device,wherein the temperature sensor is configured and disposed to detect a temperature of the gradient coil connector.30. The MRI scanner as claimed in claim 1 , further comprising a casing for accommodating the B coil arrangement claim 1 ,wherein the temperature sensor is configured and disposed to detect a temperature of the casing.4. The MRI scanner as claimed in claim 1 , further comprising a tube bore claim 1 ,wherein the temperature sensor is configured and disposed to detect a temperature of the tube bore.5111. The MRI scanner as claimed in claim 1 , wherein the control device comprises a frequency control device that is connected to the B coil arrangement and is configured to control a B frequency of a magnetic field generated by the B coil arrangement claim 1 , andwherein the frequency control device is connected to the temperature sensor in order to receive a temperature signal from the temperature sensor.6111. The MRI scanner as claimed in claim 2 , wherein the control device comprises a frequency control device that is connected to the B coil arrangement and is configured to control a ...

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Номер записи: 59
01-01-2015 дата публикации

PERSONALIZED RF COIL ARRAY FOR MR IMAGING GUIDED INTERVENTIONS

Номер: US20150000112A1
Автор: BOS Clemens, Elevelt Aaldert Jan, Martens Hubert Cécile François, Moore Elizabeth Anne, Nijenhuis Marco Hubertus Johannes, Pardoel Michel Gerardus, Possanzini Celilia, Wirtz Daniel
Принадлежит: KONINKLIJKE PHILIPS N.V.

The invention relates to a method of manufacturing a personalized RF coil array for MR imaging guided interventions. The method comprises the steps of: —acquiring diagnostic image data reflecting the anatomy of a portion of a patient's body (); —planning an intervention on the basis of the diagnostic image data, wherein a field of the intervention within the patient's body () portion is determined; —arranging one or more RF antennae () on a substrate (), which is adapted to the patient's anatomy, in such a manner that the signal-to-noise ratio of MR signal acquisition via the one or more RF antennae () from the field of the intervention is optimized. Moreover, the invention relates to a computer program and to a computer workstation. 1. A method of producing a personalized RF coil array for MR imaging guided surgical procedure on a portion of a patient's body , the method comprising the steps of:creating a model of anatomy of the portion of a patient's body using image data from at least one of X-ray, CT, and MR diagnostic images;determining an interventional area within the portion of the patient's body and an access path to the interventional area, the access path limiting access strategies during the surgical procedure; andarranging a substrate including the RF coil array having one or more RF antennae on the model of the determined interventional area, wherein sizes, shapes and positions of the RF antennae are computed based on the image data for optimal signal-to-noise ratio of an MR signal acquired from the access path and the interventional area, and wherein a shape of the substrate is adapted to a shape of the model so as to position the RF coil array firmly in close proximity on the portion of the patient's body during the surgical procedure.2. (canceled)3. The method of claim 1 , further comprising a step of providing one or more apertures on the substrate to keep the access path clear when the substrate is attached to the patient's body during the ...

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Номер записи: 60
04-01-2018 дата публикации

Apparatus and method for adjustable earpieces in an mri system

Номер: US20180000376A1
Автор: Brandon J. Tramm
Принадлежит: Life Services LLC

Apparatus and method for imaging a patient in an MRI system. This includes a frame, and at least one assembly that includes an earpiece positioner connected to a reference position on the frame, a first lockable joint on the positioner; and an earpiece connected to a patient-proximal end of the positioner by a second joint, wherein the first earpiece is moveably positioned to a selected pitch angle, a selected yaw angle, and a selected one of a plurality of distances relative to the reference position on the frame. The first lockable joint is configured to be tightened to yieldably hold the first earpiece at the selected pitch and yaw angles, and at the selected one of the plurality of distances, relative to the reference position. Optionally a second substantially similar earpiece and assembly are provided. The earpiece(s) optionally include audio transducer(s) and/or RF coil(s).

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Номер записи: 61
01-01-2015 дата публикации

NMR probe head with improved centering of the sample vial

Номер: US20150002152A1
Автор: Al Adwan Stojilkovic Danijela, Schmidig Daniel, Wilhelm Dirk
Принадлежит:

An NMR probe head () has a coil system () and a radial centering mechanism for a sample vial () having two centering devices spaced axially from each other to center the sample vial in the radial direction only. The first centering device () is disposed above the receiver coil system and at least one further centering device () is disposed axially above the coil system with an axial spacing (d) above the first centering device. The first and second centering devices restrict the radial scope for movement of the sample vial to such an extent that the sample vial cannot touch an endangered space () during the entire duration of transport of the sample vial to its measuring position, thereby precluding damage to the probe head components in the endangered space by the sample vial. 1. An NMR probe head for analyzing a substance to be measured , the substance being disposed in a longitudinal sample vial closed at one end and filled with that substance , the probe head comprising:an NMR coil system disposed around a vertical z axis, the NMR coil system being fixed radially, with respect to the z axis, relative to the NMR probe head;a first centering device for radially centering the sample vial relative to the z axis, said first centering device having a first passage opening for the sample vial that centers the sample vial in a radial direction only, wherein, in a z direction, said first centering device is disposedabove said NMR coil system and is radially fixed with respect to the z axis; andat least one second centering device, said second centering device having a second passage opening for the sample vial that centers the sample vial in the radial direction only, said second centering device being disposed axially above the NMR coil system and spaced apart from said first centering device in an axial direction of the z axis by an axial spacing with respect to the z axis, said axial spacing being selected and sizes as well as geometric shapes of said first and said ...

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Номер записи: 62
01-01-2015 дата публикации

Mounting for a Body Coil of a Magnetic Resonance Device

Номер: US20150002154A1
Автор: Martin Schramm, Razvan Lazar
Принадлежит: Individual

A mounting device for a body coil of a magnetic resonance device is provided. The mounting device includes a suspension device that has at least one suspension element. The at least one suspension element is mechanically connectable to a counterpart piece of the body coil. The suspension device is configured for suspension and coarse adjustment of the body coil in the magnetic resonance device during an adjustment process of the body coil. The mounting device also includes an adjustment device that has an adjuster for changing a position of the body coil, and adjustment indicators for displaying the position of the body coil. The adjustment device is provided for fine adjustment of the body coil during the adjustment process. The mounting device includes an attachment device differing from the suspension device. The attachment device includes at least one attachment element for mechanical interaction with the body coil.

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Номер записи: 63
01-01-2015 дата публикации

MULTI-RESONANT T/R ANTENNA FOR MR IMAGE GENERATION

Номер: US20150002156A1
Автор: Keupp Jochen, Leussler Christoph, MAZURKEWITZ Peter
Принадлежит:

A dual- or multi-resonant RF/MR transmit and/or receive antenna () especially in the form of a planar antenna or a volume array antenna (also called antenna array) is disclosed for MR image generation of at least two different nuclei like e.g. H, F, He, C, Na or other nuclei having different Larmor frequencies. Basically, the antenna is coupled by means of an inductive coupling device (LI) with related transmit/receive channels (T/R). By such an inductive coupling, the tuning and matching of the antenna at the different resonant frequencies is easier to be obtained than in case of a galvanic connection. Further, the invention relates to an MR imaging apparatus comprising such a dual- or multi-resonant RF/MR transmit and/or receive antenna. 1. Dual- or multi-resonant RF/MR transmit and/or receive antenna , comprising a coil and at least one resonant circuit , which is serially connected into the coil , wherein the antenna is inductively coupled with an RF/MR transmit and/or receive channel by means of an inductive coupling device in the form of at least one loop or coil which is dimensioned and/or positioned in relation to the antenna such that by the resulting magnetic flux between both , resonant frequencies of the antenna are tuned to Larmor frequencies of two or more nuclei of interest and impedance-matched to the connected RF/MR transmit and/or receive channel , wherein the at least one loop or coil is arranged such that it can be mechanically displaced in relation to the antenna for adjusting the magnetic flux between the antenna and the inductive coupling device , whereby the inductive coupling is broadband in that tuning and matching applies to both or all resonant frequencies.2. RF/MR transmit and/or receive antenna according to claim 1 , wherein the inductive coupling device is realized in the form of a first coil which is connected with the RF/MR transmit/receive channel and a second coil which is connected with the antenna claim 1 , wherein both coils are ...

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Номер записи: 64
05-01-2017 дата публикации

MAGNETIC RESONANCE IMAGING SYSTEM AND METHOD

Номер: US20170003367A1
Автор: AKAO JAMES HIROSHI, Chu Dashen, Li Zhu, LINDSAY SCOTT ALLEN, LIU XIAOXU, Stormont Robert Steven, ZHENG HAI
Принадлежит: GENERAL ELECTRIC COMPANY

A method of parallel imaging for use with a magnetic resonance imaging apparatus includes producing a longitudinal magnetic field B throughout a target volume, producing a transverse magnetic field B that is generally perpendicular to B throughout the target volume, transmitting a plurality of RF pulses to the target volume, with a surface coil, acquiring first MRI data from a target within the target volume in response to the transmission of RF pulses, and with a body coil, acquiring second MRI data from the target within the target volume in response to the transmission of RF pulses, wherein acquisition of the first MRI data and the second MRI data occurs substantially simultaneously. 1. A method of parallel imaging for use with a magnetic resonance imaging apparatus , the method comprising the steps of:{'b': '0', 'producing a longitudinal magnetic field B throughout a target volume;'}{'b': 1', '0, 'producing a transverse magnetic field B that is generally perpendicular to B throughout the target volume;'}transmitting a plurality of RF pulses to the target volume;with a surface coil, acquiring first MRI data from a target within the target volume in response to the transmission of RF pulses; andwith a body coil, acquiring second MRI data from the target within the target volume in response to the transmission of RF pulses;wherein acquisition of the first MRI data and the second MRI data occurs substantially simultaneously.2. The method according to claim 1 , further comprising the step of:reducing mutual couplings between the body coil and the surface coil during MRI data acquisition.3. The method according to claim 2 , wherein:the step of reducing mutual couplings between the body coil and the surface coil includes generating a high blocking impedance to reduce RF current in the body coil while receiving the second MRI data.4. The method according to claim 3 , wherein:the body coil is a birdcage body coil.5. The method according to claim 4 , wherein:the high ...

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Номер записи: 65
05-01-2017 дата публикации

NUCLEAR MAGNETIC RESONANCE APPARATUS, SYSTEMS, AND METHODS

Номер: US20170003413A1
Автор: Jachmann Rebecca Corina, Li Lilong, Reiderman Arcady
Принадлежит: Haliburton Energy Services, Inc.

Apparatus and systems include a magnet assembly comprising a central magnet having a first axial end and a second, opposite axial end; a first end piece magnet having a proximal end and a distal end, the proximal end spaced apart from the first axial end of the central magnet; and a second end piece magnet spaced apart from the second axial end of the central magnet; at least one first shim magnet disposed adjacent to or at least partially surrounded by first magnetically permeable material, the at least one first shim magnet disposed next to an end of the first end piece magnet that is proximal to the central magnet, or next to an end of the first end piece magnet that is distal to the central magnet; and a downhole tool attached to the magnet assembly. Additional apparatus, systems, and methods are disclosed. 1. An apparatus , comprising: a central magnet having a first axial end and a second, opposite axial end;', 'a first end piece magnet spaced apart from the first axial end of the central magnet; and', 'a second end piece magnet spaced apart from the second axial end of the central magnet;', 'at least one first shim magnet disposed between the central magnet and the first end piece magnet, the first shim magnet disposed adjacent to or at least partially surrounded by a first magnetically permeable material, the first shim magnet to shape a first static magnetic field sub-volume provided by the central magnet and the first end piece magnet; and, 'a magnet assembly to produce a magnetic field in a volume in a geological formation, the magnet assembly comprisinga downhole tool attached to the magnet assembly.2. The apparatus of claim 1 , further comprising:copper radially disposed between the first shim magnet and the first magnetically permeable material, or between the central magnet and central magnetically permeable material.3. The apparatus of claim 1 , wherein the at least one first shim magnet comprises multiple unitary ring-shaped elements and/or a series ...

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Номер записи: 66
07-01-2016 дата публикации

Mri apparatus

Номер: US20160003925A1
Автор: Haruki Nakamura, Kazuyuki Soejima
Принадлежит: Toshiba Corp, Toshiba Medical Systems Corp

According to one embodiment, an MRI apparatus includes an amplifier and processing circuitry. The amplifier amplifies an RF pulse and outputs the amplified RF pulse to an RF coil. The processing circuitry performs correction processing on an envelope of an RF pulse to be inputted to the amplifier so as to compensate nonlinear input-output characteristics of the amplifier. As to this correction processing, the processing circuitry selects a correction information item out of a plurality of correction information items prepared for a corresponding plurality of imaging conditions and performs the correction processing by using the selected information item.

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Номер записи: 67
07-01-2016 дата публикации

POWER MEASUREMENT ON MAGNETIC RESONANCE IMAGING COIL AT DIFFERENT FREQUENCY THAN LARMOR FREQUENCY

Номер: US20160003927A1
Автор: Felblinger Jacques, Kudielka Guido Peter, Vuissoz Pierre-Andre
Принадлежит:

The system of the invention utilizes a magnetic resonance imaging (MRI) coil to measure power at a different frequency than the MRI frequency to produce MRI images. The different frequency such as harmonic frequency of the MR coil is applied to the coil and the reflected power is measured by the power sensor. Changes due to respiratory, cardiac, or overall motion are then analyzed, as desired. During imaging, the coil is connected to the MRI system and disconnected from the setup described, including the power sensor and its associated data processing, amplifier, signal generator, and directional coupler. Disconnect is provided in a one-step process by the switching circuit. Using the reflected power of a different frequency than the resonant frequencies of an MR coil improves signal information because it does not interfere with MR imaging process, is independent of patient and position, depicts the mechanical motion of the chest or organs near to the coil, and also measures irregular physiological activities with enough temporal resolution to describe these physiological changes. 2. The method of claim 1 , further comprising a step of analyzing the MRI RF excitation and measurement through the logic circuit and communicating results to the switching circuit.3. The method of claim 2 , further comprising a step of directing the data to the MRI system for gating purposes.4. The method of claim 3 , wherein the step of measuring includes digitizing the reflected power of the coil.5. The method of claim 4 , wherein said step of routing further comprises routing the signal of predetermined frequency through a switching circuit.6. The method of claim 5 , further comprising disconnecting the source of the signal from the coil.7. The method of claim 6 , wherein the step of disconnecting occurs during excitation and sampling of imaging data.8. The method of claim 6 , wherein the step of disconnecting occurs during excitation and sampling of imaging data at the 1H-frequency.9 ...

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Номер записи: 68
04-01-2018 дата публикации

HF COIL ASSEMBLY

Номер: US20180003782A1
Автор: FREYTAG Nicolas, HASSAN Alia
Принадлежит:

An HF coil assembly for generating independent alternating magnetic fields in an examination volume of a magnetic resonance apparatus is presented, the HF coil assembly comprising a first coil pair of saddle coils and a second coil pair of saddle coils, each saddle coil having longitudinal conductor elements and curved conductor elements arranged along a common lateral surface of a circular cylinder having a cylinder axis. Each coil pair comprises curved conductor elements and longitudinal conductor elements which are interconnected at a high frequency. The saddle coils also have diagonal conductor elements and/or bridge elements that connect the longitudinal and curved conductor elements. The coil pairs are opposite to each other relative to the cylinder axis. 2. The HF coil assembly according to claim 1 , wherein at least one of the bridge elements is an electrically conductive element.3. The HF coil assembly according to claim 1 , wherein at least one of the bridge elements is a capacitor.4. The HF coil assembly according to claim 1 , wherein at least the first coil pair or the second coil pair comprises diagonal conductor elements claim 1 , which extend along a helical line on the lateral surface.5. The HF coil assembly according to claim 4 , wherein the bridge elements of the first coil pair claim 4 , which are arranged diagonally claim 4 , cross over the diagonal conductor elements of the second coil pair claim 4 , and/or wherein the bridge elements of the second coil pair claim 4 , which are arranged diagonally claim 4 , cross over the diagonal conductor elements of the first coil pair.6. The HF coil assembly according to claim 1 , wherein the curved conductor elements of the first coil pair and the curved conductor elements of the second coil pair are oriented axially toward each other.7. The HF coil assembly according to claim 1 , wherein the azimuthal opening angle of the saddle coils of at least the first coil pair or the second coil pair is between 100° ...

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Номер записи: 69
04-01-2018 дата публикации

MAGNETIC RESONANCE IMAGING APPARATUS

Номер: US20180003783A1
Автор: IMAI SATOSHI, TOMIHA Sadanori
Принадлежит: Toshiba Medical Systems Corporation

According to one embodiment, a magnetic resonance imaging apparatus includes a first transmit coil transmitting a first RF pulse corresponding to a resonance frequency of a first nuclide species in an object placed in an imaging space, a first receive coil receiving a first NMR signal of the first nuclide species, a cable connected to the first receive coil, a balun attached to the cable and/or the first receive coil, a substance attached to the balun and/or a vicinity of the balun, the substance including a second nuclide species having a resonance frequency different from the resonance frequency of the first nuclide species, a second transmit coil transmitting a second RF pulse corresponding to a resonance frequency of the second nuclide species, and a second receive coil receiving a second NMR signal of the second nuclide species in the substance. 1. A magnetic resonance imaging apparatus comprising:a first transmit coil configured to transmit a first RF pulse corresponding to a resonance frequency of a first nuclide species in an object placed in an imaging space;a first receive coil configured to receive a first NMR signal of the first nuclide species;a cable connected to the first receive coil;a balun attached to at least one of the cable and the first receive coil;a substance attached to at least one of the balun and vicinity of the balun, the substance including a second nuclide species having a resonance frequency different from the resonance frequency of the first nuclide species;a second transmit coil configured to transmit a second RF pulse corresponding to a resonance frequency of the second nuclide species; anda second receive coil configured to receive a second NMR signal of the second nuclide species in the substance.2. The magnetic resonance imaging apparatus according to claim 1 , further comprising processing circuitry configured to calculate a T* value corresponding to the second nuclide species based on the second NMR signal claim 1 , and to ...

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Номер записи: 70
04-01-2018 дата публикации

MAGNETIC RESONANCE APPARATUS AND METHOD FOR OPERATION THEREOF WITH ACTIVELY CONTROLLABLE RADIO-FREQUENCY COIL PROFILES

Номер: US20180003787A1
Автор: Cloos Martijn, Lauer Lars, SODICKSON DANIEL, WIGGINS GRAHAM
Принадлежит:

In a magnetic resonance (MR) apparatus and a method for operation thereof, the radio-frequency (RF) resonator of the scanner of the apparatus fed from a single RF source and is operated, during a total scan duration for acquiring MR scan data from a subject, so as to excite nuclear spins in the subject with respective RF fields having different B1+ field profiles that are radiated at respectively different times during the acquisition of the scan data. The scan data acquired during the scan thus are produced from MR signals caused by nuclear spins excited by at least two different B1+ field profiles. The scan can be used to acquire MR data for MR fingerprinting. 1. A method for operating a magnetic resonance (MR) apparatus comprising an MR data acquisition scanner comprising an RF radiator comprising a radiator circuit , said method comprising:operating said MR data acquisition scanner while an examination subject is situated in the MR data acquisition scanner during a total scan duration;during said total scan duration, feeding said RF radiator from a single RF source and thereby causing said RF radiator, at respectively different times, to radiate a selected RF field during each of said different times that excites nuclear spins in said examination subject so as to cause the excited nuclear spins to emit MR signals that are detected as said MR scan data;during said total scan duration, altering a current flowing in said radiator circuit, during at least some of said different times, to cause said RF radiator to respectively radiate said selected RF fields as respective B1+ fields with different B1+ field profiles during said at least some of said respective times, thereby exciting all of said nuclear spins with at least one of said B1+ field profiles and exciting at least some of said nuclear spins with multiple, different B1+ field profiles;operating said MR data acquisition scanner to detect said MR signals from said nuclear spins, each of said MR signals having ...

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Номер записи: 71
04-01-2018 дата публикации

NUCLEAR MAGNETIC RESONANCE APPARATUS, SYSTEMS, AND METHODS

Номер: US20180003852A1
Автор: Jachmann Rebecca Corina, Li Lilong, Reiderman Arcady
Принадлежит:

A method includes disposing a downhole tool having a magnet assembly into a wellbore. The method includes generating, using the magnet assembly, a magnetic polarization in a volume into a subterranean region about the wellbore. The method also includes emitting an excitation in the magnetic polarization in the volume in the subterranean region. The method includes detecting, by at least one antenna, a nuclear magnetic resonance response to the excitation of the volume in the subterranean region. The method also includes determining a property of the subterranean region based on the nuclear magnetic resonance response. 1. A method comprising:disposing a downhole tool having a magnet assembly into a wellbore;generating, using the magnet assembly, a magnetic polarization in a volume into a subterranean region about the wellbore;emitting an excitation in the magnetic polarization in the volume in the subterranean region;detecting, by at least one antenna, a nuclear magnetic resonance response to the excitation of the volume in the subterranean region; anddetermining a property of the subterranean region based on the nuclear magnetic resonance response.2. The method of claim 1 , wherein generating the magnetic polarization comprises generating a magnetic polarization of nuclear spins.3. The method of claim 1 , wherein detecting the nuclear magnetic resonance response comprises detecting an azimuthally-selective nuclear magnetic resonance response.4. The method of claim 3 , wherein the at least one antenna comprises multiple antennas disposed at respective locations along a longitudinal axis of the downhole tool.5. The method of claim 4 , wherein the magnet assembly comprises a central magnet having a first axial end and a second axial end that is opposite the first axial end claim 4 , a first end piece magnet spaced apart from the first axial end of the central magnet claim 4 , a second end piece magnet spaced apart from the second axial end of the central magnet claim 4 ...

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Номер записи: 72
07-01-2021 дата публикации

Local Coil with Segmented Antenna Device

Номер: US20210003645A1
Автор: Kundner Thomas, Rehner Robert, Zink Stephan
Принадлежит:

A local coil for a magnetic resonance tomography scanner has an antenna. The antenna has a conductor loop and a plurality of electronic function groups, which are arranged in a distributed manner spaced apart from one another along the conductor loop and are electrically connected to one another by flexible conductor segments. 1. A local coil for a magnetic resonance tomography scanner , the local coil comprising:an antenna having a conductor loop and a plurality of electronic function groups;wherein the electronic function groups are arranged in a distributed manner spaced apart from one another and are electrically connected to one another by flexible conductor segments.2. The local coil as claimed in claim 1 , wherein the flexible conductor segments have a flexible circuit board with at least three layers.3. The local coil as claimed in claim 1 , wherein one of the flexible conductor segments and one of the electronic function groups are electrically conductively connected to one another by a form-fit and/or force-fit connection.4. The local coil as claimed in claim 1 , wherein components of a first one of the electronic function groups are arranged directly on a first one of the flexible conductor segments.5. The local coil as claimed in claim 4 , wherein the first flexible conductor segment has a bracing in a region of the first electronic function group.6. The local coil as claimed in claim 5 , wherein the bracing comprises a stiffer carrier material in the first flexible conductor segment and/or additional layers of a carrier material and/or a layer of the carrier material thicker in comparison to an adjacent flexible region.7. The local coil as claimed in claim 1 , wherein a first one of the flexible conductor segments has a shielded electrical signal line and/or a control line for the electronic function groups.8. The local coil as claimed in claim 1 , wherein a first one of the flexible conductor segments has a standing wave trap claim 1 , wherein the ...

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Номер записи: 73
03-01-2019 дата публикации

NMR PROBE COMPRISING A MULTI-PART LOWER INSERT PORTION

Номер: US20190004126A1
Автор: DE VRIES Jonathan, Meister Roger
Принадлежит:

A temperature-controlled NMR probe has a lower insert portion formed of multiple parts including two disc-shaped sub-elements that are not mechanically rigidly interconnected, lie flat against one another in the mounted state and are perpendicular to the z axis. The first sub-element (), in terms of material and geometric structure, fulfils the function of electrically insulating the RF and HV lines fed through the lower insert portion, has an electrical conductivity sigma<10S/m, mechanically and retains components of the NMR probe constructed on the lower insert portion. The second sub-element () retains the first sub-element on a main frame () of the NMR probe, and is made of a ductile plastics material or metal having a mechanical breaking strength σ>100 N/mmand a melting temperature T>250° C. This achieves high breaking strength and resistance to thermal stress while simultaneously attaining required RF and HV properties. 1. Temperature-controlled nuclear magnetic resonance (NMR) probe comprising:an RF coil system arranged around a vertical z axis,electrical and mechanical components, and wherein the lower insert portion is formed of multiple parts and comprises at least first and second substantially disc-shaped sub-elements that are not mechanically rigidly interconnected, that lie flat against one another when in a mounted state and that are arranged perpendicularly to the z axis,', {'sup': '3', 'wherein the first sub-element is formed of a material and has a geometric structure that electrically insulates the components, such that the first sub-element has an electrical conductivity sigma<10S/m,'}, 'wherein the first sub-element is configured to mechanically support and/or retain the components, and', {'sup': '2', 'sub': 'S', 'wherein the second sub-element is formed of a ductile plastics material or metal that mechanically retains the first sub-element on a main frame of the NMR probe, wherein the ductile plastics material or metal has a mechanical breaking ...

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Номер записи: 74
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 ...

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Номер записи: 75
03-01-2019 дата публикации

Inductive Coupling in Multiple Resonance Circuits in a Nuclear Magnetic Resonance Probe and Methods of Use

Номер: US20190004128A1
Автор: Albert Zens
Принадлежит: Jeol Ltd

In various embodiments of the invention, inductive coupling can be to a secondary coil rather than a primary coil in order to optimize the topology of the NMR probe. In addition, by coupling to a secondary coil using a detection coil located below the lower insulator the RF homogeneity and signal to noise can be improved together with the NMR probe topology. By effecting inductive coupling to an inductor in a multiple resonance circuit, rather than to the sample inductor parameters associated with the NMR, probe construction can be arranged to increase RF homogeneity and signal to noise, while reducing space utilization constraints. In various embodiments of the invention, the primary mode in a secondary coil can be split into two modes with a resonator with inductive coupling to the secondary coil.

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Номер записи: 76
03-01-2019 дата публикации

QUBIT NETWORK NON-VOLATILE IDENTIFICATION

Номер: US20190006284A1
Автор: Brink Markus, Hertzberg Jared B., Rosenblatt Sami
Принадлежит:

A technique relates to a superconducting chip. Resonant units have resonant frequencies, and the resonant units are configured as superconducting resonators. Josephson junctions are in the resonant units, and one or more of the Josephson junctions have a shorted tunnel barrier. 1. A superconducting chip comprising:resonant units having resonant frequencies, wherein the resonant units are configured as superconducting resonators; andJosephson junctions in the resonant units, one or more of the Josephson junctions having a shorted tunnel barrier.2. The superconducting chip of claim 1 , wherein the shorted tunnel barrier causes an increase in the resonant frequencies for the resonant units having the shorted tunnel barrier.3. The superconducting chip of claim 1 , wherein some of the Josephson junctions have a tunnel barrier that is not shorted.4. The superconducting chip of claim 1 , wherein the resonant frequencies are designed to fall within a predefined frequency band for each of the resonant units having no shorted tunnel barrier in the Josephson junctions.5. The superconducting chip of claim 4 , wherein the resonant frequencies for the resonant units having the shorted tunnel barrier are designed to fall outside of the predefined frequency band.6. The superconducting chip of claim 1 , wherein the one or more of the Josephson junctions having the shorted tunnel barrier are predefined in advance in order to provide a predefined chip identification.7. The superconducting chip of claim 1 , wherein:the Josephson junctions are structured to have a first configuration or a second configuration;the first configuration is a non-shorted Josephson junction, the non-shorted Josephson junction having a tunnel barrier defined as not being shorted; andthe second configuration is a shorted Josephson junction, the shorted Josephson junction being defined as having the shorted tunnel barrier.8. The superconducting chip of claim 7 , wherein a combination of the first configuration ...

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Номер записи: 77
20-01-2022 дата публикации

METHOD AND SYSTEM FOR MONITORING DEPLETION OF A COOLANT IN A COOLING SYSTEM

Номер: US20220018916A1
Автор: Chaitanya Anupam, Mahajan Tushar, Sundarapandian Manivannan
Принадлежит:

A method of monitoring depletion of a coolant in a cooling system associated with imaging modality is disclosed. The method includes receiving set of signal values from sensing unit, wherein set of signal values correspond to parameters of cooling system, determining class associated with set of signal values using an artificial intelligence model, selecting prediction model capable of predicting depletion rate of the coolant based on class associated with set of signal values, computing depletion rate of coolant in cooling system based on set of signal values using the selected prediction model, determining number of days remaining to refill the coolant in cooling system based on the depletion rate of the coolant in cooling system, and generating warning signal on graphical user interface, warning signal indicative of number of days remaining to refill coolant in cooling system. 1. A method of monitoring depletion of a coolant in a cooling system associated with at least one imaging modality , the method comprising:receiving a set of signal values from a sensing unit associated with the cooling system, wherein the set of signal values correspond to one or more parameters of the cooling system;determining a class associated with the set of signal values using a trained artificial intelligence model;selecting a prediction model capable of predicting a depletion rate of the coolant in the cooling system from a plurality of predetermined prediction models based on the class associated with the set of signal values;computing a depletion rate of the coolant in the cooling system based on the set of signal values using the selected prediction model;determining a number of days remaining to refill the coolant in the cooling system based on the depletion rate of the coolant in the cooling system; andgenerating a warning signal on a graphical user interface, the warning signal indicative of the number of days remaining to refill the coolant in the cooling system.2. The ...

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Номер записи: 78
20-01-2022 дата публикации

COMPACT HYBRID ORTHOGONAL SIGNAL GENERATOR FOR MRI FRONT-END

Номер: US20220018917A1
Автор: CHENG Hong, Li Wen Ming, Li Zhi Bin, Wang Jianmin
Принадлежит: Siemens Healthcare GmbH

The disclosure relates to a hybrid orthogonal signal generator, a coil transmission front-end device, an RF coil system, and an MRI system. The hybrid orthogonal signal generator has an input end for receiving an RF signal, generates a hybrid orthogonal excitation signal on the basis of the RF signal, and provides the hybrid orthogonal excitation signal by means of an output end of the hybrid orthogonal signal generator, and comprises: a first conductor, arranged in a plane and being arc-shaped; and a second conductor having mutual inductance with the first conductor, the second conductor being connected between the input end and output end, wherein the first conductor and second conductor are parallel and arranged as mirror images of each other. The hybrid orthogonal signal generator has a compact size and is suitable for providing hybrid orthogonal excitation signals for an MRI system with a low field strength. 1. A hybrid orthogonal signal generator , comprising:an input end configured to receive an RF signal, generate a hybrid orthogonal excitation signal on the basis of the RF signal, and provide the hybrid orthogonal excitation signal to an output end of the hybrid orthogonal signal generator;a first conductor configured as an arc-shaped conductor pathway, the first conductor being connected between the input end and to the output end; anda second conductor configured to have mutual inductance with the first conductor, the second conductor being connected between the input end and the output end,wherein the first conductor and second conductor are parallel and symmetric.2. The hybrid orthogonal signal generator as claimed in claim 1 , further comprising: wherein the first conductor is disposed on the first side of the substrate, and', 'wherein the second conductor is disposed on the second side of the substrate., 'a substrate having a first side and a second side,'}3. The hybrid orthogonal signal generator as claimed in claim 2 , further comprising:a first ...

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Номер записи: 79
08-01-2015 дата публикации

Nuclear magnetic resonance (nmr) spectroscopy device

Номер: US20150008922A1
Автор: Aldo Hendrikus Velders, Maria Victoria GOMEZ ALMAGRO, Raluca Maria Fratila, Stanislav Sykora
Принадлежит: WAGENINGEN UNIVERSITEIT

The invention relates to a Nuclear Magnetic Resonance (NMR) spectroscopy device adapted for carrying out 1D and nD homo- and heteronuclear NMR spectroscopy measurements of a plurality of nuclei, comprising an RF coil adapted to transmit RF to and/or receive RF from a measuring volume, wherein the RF coil forms part of a non-tuned radiofrequency circuit. The invention further relates to a method of NMR data acquisition, a method of manufacturing a NMR spectroscopy device and a NMR-device holder.

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Номер записи: 80
08-01-2015 дата публикации

NON-CYLINDRICAL CABLE BALUN DESIGN FOR RF COILS

Номер: US20150008926A1
Автор: Bhatia Sahil, Gregan Darren Charles, Searles Gabriel, STICKLE Yun-Jeong, Yang Tae Young, Zink Thomas Edward
Принадлежит:

A non-cylindrical cable balun design having reduced space requirements and that provides for a lighter-weight RF coil is disclosed. The balun includes a balun shell having a non-cylindrical profile, a dielectric foam positioned within the balun shell so as to fill an interior volume defined by the balun shell, and one or more capacitors formed on the balun shell. A non-cylindrical coaxial cable that transmits electromagnetic signals to the balun extends through a length of the balun and is surrounded by the dielectric foam. 1. A magnetic resonance imaging (MRI) system comprising:at least one magnet for generating a magnetic field;at least one gradient coil for manipulating the magnetic field generated by the at least one magnet by way of a gradient field;at least one radio frequency (RF) receiver coil to receive electromagnetic signals from the manipulated magnetic field;at least one balun in electrical communication with the at least one RF receiver coil to condition the received electromagnetic signals; anda coaxial cable to transmit the received electromagnetic signals to the at least one balun, the coaxial cable comprising a non-cylindrical coaxial cable; a balun shell; and', 'a dielectric material positioned within the balun shell and surrounding the non-cylindrical coaxial cable which extends through the balun; and', 'one or more capacitors formed on the balun shell., 'wherein each of the at least one baluns comprises2. The MRI system of wherein the dielectric material comprises expanded polypropylene (EPP) foam that increases an impedance of the balun to common-mode currents.3. The MRI system of wherein each of the at least one baluns comprises a non-cylindrical balun that generally corresponds in shape to the non-cylindrical coaxial cable.4. The MRI system of wherein the balun shell comprises:a dielectric flex housing comprising an inner surface and an outer surface; anda copper layer applied to the outer surface of the dielectric flex housing; andwherein ...

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Номер записи: 81
27-01-2022 дата публикации

Eigenmode Transmit Array Coil for Magnetic Resonance Imaging

Номер: US20220026510A1
Автор: Atalar Ergin, KAZEMIVALIPOUR Ehsan
Принадлежит:

A method of designing a coil array for use in a magnetic resonance imaging (MRI) system based on eigenmode analysis of a scattering matrix associated with the coil array is provided. The method includes determining a normalized reflected power generated by coils in the coil array in response to excitation thereof via at least one excitation signal, and adjusting one or more parameters of at least one of the coils so as to minimize the normalized reflected power. 1. A method of manufacturing a coil array for use in a magnetic resonance imaging (MRI) system , comprising:determining a normalized reflected power generated by coils in said coil array in response to excitation thereof via at least one excitation signal; andadjusting one or more parameters of at least one of said coils so as to minimize said normalized reflected power, thereby arriving at design values for said parameters.2. The method of claim 1 , wherein said normalized reflected power is determined as a function of said at least one excitation signal and a scattering matrix (S) associated with said coil array.3. The method of claim 1 , wherein said at least one excitation signal comprises an excitation vector comprising one or more excitation signals each of which is associated with excitation of one coil of said coil array.4. The method of claim 3 , further comprising expanding said excitation vector as a linear combination of excitation eigenmodes of said coil array.5. The method of claim 4 , further comprising determining claim 4 , for each of said excitation eigenmodes claim 4 , a modal reflected power value.6. The method of claim 5 , wherein said step of determining said normalized reflected power comprises computing a weighted sum of the modal reflected power values.7. The method of claim 5 , wherein said one or more parameters are adjusted so as to increase a number of excitation eigenmodes that produces said modal reflected power value equal to or less than about 50%.8. The method of claim 1 , ...

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Номер записи: 82
12-01-2017 дата публикации

SYSTEM AND METHOD FOR SPIRAL VOLUME IMAGING

Номер: US20170010339A1
Автор: Rosen Matthew S., Salameh Najat, Sarracanie Mathieu
Принадлежит:

A system and method for system for performing a magnetic resonance imaging (MRI) process using an MRI system is provided. A coil system includes a substrate configured to follow a contour of a portion of a subject to be imaged by the MRI system and at least one coil coupled to the substrate and forming a spiral pattern. 1. A magnetic resonance imaging (MRI) system , comprising:a magnet system configured to generate a static magnetic field about at least a region of interest (ROI) of a subject arranged in the MRI system;a plurality of gradient coils configured to establish at least one magnetic gradient field with respect to the static magnetic field; a substrate configured to follow a contour of a portion of a subject to be imaged by the MRI system; and', 'at least one coil coupled to the substrate and forming a hemispherical spiral pattern., 'a radio frequency (RF) system including a transmit and/or receive coil comprising2. The MRI system of wherein the static magnetic field is a low-field static magnetic field.3. The MRI system of wherein the static magnetic field is less than 10 mT.4. The MRI system of wherein the transmit and/or receive coil is sized to image a periphery of the subject.5. The MRI system of wherein the hemispherical spiral pattern includes a distance between adjacent portions of the at least one coil that is uniform.6. The MRI system of wherein the MRI system is configured to perform a pulse sequence to perform an imaging process and wherein the at least one coil is configured to perform transmit and receive operations during performance of the pulse sequence.7. The MRI system of wherein the pulse sequence includes a balance stead state free precession (b-SSFP) pulse sequence.8. The MRI system of wherein the substrate forms a helmet and the portion of the subject is a head claim 1 , such that the helmet is configured to contour the head of the subject.9. The MRI system of wherein the at least one coil is configured to spiral out from a center ...

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Номер записи: 83
14-01-2016 дата публикации

MAGNETIC RESONANCE IMAGING APPARATUS AND METHOD

Номер: US20160011289A1
Автор: CHOI Sang-cheon
Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

An MRI apparatus includes a data acquirer configured to under-sample MR signals, respectively received from channel coils included in a radio frequency (RF) multi-coil, at non-uniform intervals to acquire pieces of data set; and an image processor configured to restore pieces of K-space data respectively corresponding to the channel coils by using a positional relationship based on a spatial distance between a reference data set among the acquired pieces of data set and at least two of data set among the acquired pieces of data set, in a K-space. 1. A magnetic resonance imaging (MRI) apparatus comprising:a data acquirer configured to under-sample MR signals, respectively received from channel coils included in a radio frequency (RF) multi-coil, at non-uniform intervals to acquire pieces of data set; andan image processor configured to restore pieces of K-space data respectively corresponding to the channel coils by using a positional relationship based on a spatial distance between a reference data set among the acquired pieces of data set and at least two of data set among the acquired pieces of data set, in a K-space.2. The MRI apparatus of claim 1 , wherein the data acquirer is configured to under-sample the MR signals at the non-uniform intervals in an entire K-space corresponding to one of the channel coils.3. The MRI apparatus of claim 1 , wherein the data acquirer is configured to divide the K-space corresponding to each of the channel coils into blocks claim 1 , and under-sample the MR signals for corresponding blocks at the non-uniform intervals to acquire the pieces of data set.4. The MRI apparatus of claim 3 , wherein the image processor is configured to restore the pieces of K-space data for each of the divided plurality of blocks.5. The MRI apparatus of claim 3 , wherein the data acquirer is configured to apply a same non-uniform under-sampling pattern to the corresponding blocks claim 3 , to acquire the pieces of data set.6. The MRI apparatus of claim ...

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Номер записи: 84
11-01-2018 дата публикации

Cable Arrangement for Use in a Magnetic Resonance Local Coil

Номер: US20180011154A1
Автор: Kraus Wolfgang, Kundner Thomas, Zigann Martin, Zink Stephan
Принадлежит:

An antenna of a cable arrangement is provided for use in an MR local coil. An MR local coil with such a cable arrangement and a method for producing such a cable arrangement are provided. The cable arrangement includes an electrical conductor, which may have a material with a high electrical conductivity, such as copper for instance. The cable arrangement, in particular the electrical conductor, is embodied in a wavelike manner (e.g., the cable arrangement has a waveform). 1. A cable arrangement for use in a magnetic resonance (MR) local coil , the cable arrangement comprising:an electrical conductor, wherein the electrical conductor has a wavelike shape in the MR local coil.2. The cable arrangement of claim 1 , further comprising:an elastic carrier.3. The cable arrangement of claim 2 , wherein the electrical conductor is connected to the elastic carrier in a two-dimensional manner.4. The cable arrangement of claim 2 , wherein the elastic carrier is arranged on at least two opposing sides of the electrical conductor.5. The cable arrangement of claim 2 , wherein the electrical conductor is arranged on at least two opposing sides of the elastic carrier.6. The cable arrangement of claim 2 , wherein the electrical conductor is at least partially encased by the elastic carrier claim 2 , the elastic carrier is at least partially encased by the electrical conductor claim 2 , or a combination thereof.7. The cable arrangement of claim 2 , wherein the elastic carrier comprises plastic.8. The cable arrangement of claim 1 , wherein the electrical conductor is planar and wavelike shaped.9. The cable arrangement of claim 1 , further comprising:a neutral fiber and the electrical conductor is disposed in the neutral fiber.10. The cable arrangement of claim 1 , further comprising:a tissue of at least two longitudinal threads, a number of transverse threads, or the at least two longitudinal threads and the number of transverse threads.11. The cable arrangement of claim 10 , wherein ...

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Номер записи: 85
10-01-2019 дата публикации

STAGGERED PARALLEL TRANSMISSION RADIO FREQUENCY COIL FOR MAGNETIC RESONANCE IMAGING

Номер: US20190011508A1
Автор: SAHA SAIKAT
Принадлежит:

Methods and systems are provided for radio frequency (RF) coils for magnetic resonance imaging (MRI) systems. In one embodiment, an RF coil configured for an MRI system comprises a plurality of RF coil conductors, each RF coil conductor comprising a base side with two arms extending therefrom. In this way, the RF coil may efficiently generate magnetic fields with improved channel isolation while producing fewer annefact artifacts. 1. A radio frequency (RF) coil configured for a magnetic resonance imaging (MRI) system , comprising:a plurality of RF coil conductors, each RF coil conductor comprising a base side with two arms extending therefrom.2. The RF coil of claim 1 , wherein the plurality of RF coil conductors includes a plurality of outer RF coil conductors and a plurality of inner RF coil conductors claim 1 ,wherein each of the plurality of inner RF coil conductors is positioned within a region defined by a corresponding outer RF coil conductor.3. The RF coil of claim 2 , wherein the two arms of each inner RF coil conductor are aligned with the two arms of the corresponding outer RF coil conductor.4. The RF coil of claim 1 , further comprising a plurality of shields claim 1 , wherein each RF coil conductor is positioned on an interior surface of a corresponding shield of the plurality of shields.5. The RF coil of claim 4 , wherein each RF coil conductor is fixedly attached to the interior surface of the corresponding shield via a plurality of posts.6. The RF coil of claim 1 , wherein the base side of each RF coil conductor includes at least one slot for receiving a tuning capacitor.7. The RF coil of claim 1 , wherein the two arms of each RF coil conductor of the plurality of RF coil conductors are oriented in a same direction.8. The RF coil of claim 1 , wherein the plurality of RF coil conductors are positioned in a staggered configuration along a circumference of the RF coil.9. The RF coil of claim 1 , wherein each RF coil conductor is coupled to at least one ...

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Номер записи: 86
10-01-2019 дата публикации

METAL DETECTION SENSOR AND METAL DETECTION METHOD USING SAME

Номер: US20190011591A1
Автор: TADA Mitsuo, Takahashi Taro
Принадлежит:

The object of the present invention is to provide a small-sized metal detection sensor for detecting fine metal contaminants, using an electromagnetic induction detection technique. 1. A metal detection sensor for detecting metal contained in an object under inspection moving through a passageway , the sensor comprising:at least one magnet generating static magnetic field; andat least one magnetic-field sensor for detecting magnetic field generated by the metal, wherein:the magnet is located outside of the magnetic-field sensor along an axial direction perpendicular to a magnetic-field detection surface of the magnetic-field sensor; the magnetic-field sensor is located outside of the magnet along an axial direction connecting an N-pole and an S-pole of the magnet; and the magnet and the magnetic-field sensor are opposed to each other.2. A metal detection sensor according to claim 1 , wherein: the magnetic-field sensor is a solenoid coil; and the axial direction perpendicular to the magnetic-field detection surface of the magnetic-field sensor is an axial direction of the coil.3. A metal detection sensor according to claim 1 , wherein: the magnetic-field sensor is a spiral coil; the axial direction perpendicular to the magnetic-field detection surface of the magnetic-field sensor is the axial direction of the coil; and the spiral coil is a wire spirally wound in a plane perpendicular to the axial direction of the coil.4. A metal detection sensor according to claim 1 , wherein: the magnetic-field sensor is a pot-shaped coil; and the axial direction perpendicular to the magnetic-field detection surface of the magnetic-field sensor is the axial direction of the coil.5. A metal detection sensor according to claim 2 , wherein the coil has an iron core.6. A metal detection sensor according to claim 1 , wherein: there are a plurality of the magnet; the plurality of magnets are opposed across the passageway; and N-to-S poles orientations of the plurality of magnets coincide ...

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Номер записи: 87
09-01-2020 дата публикации

AUTOMATIC CONFIGURATION OF A LOW FIELD MAGNETIC RESONANCE IMAGING SYSTEM

Номер: US20200011952A1
Автор: Charvat Gregory L., Jordan Jeremy Christopher, Poole Michael Stephen, REARICK Todd, Rothberg Jonathan M., Sacolick Laura
Принадлежит: Hyperfine Research, Inc.

In some aspects, a method of operating a magnetic resonance imaging system comprising a Bmagnet and at least one thermal management component configured to transfer heat away from the Bmagnet during operation is provided. The method comprises providing operating power to the Bmagnet, monitoring a temperature of the Bmagnet to determine a current temperature of the Bmagnet, and operating the at least one thermal management component at less than operational capacity in response to an occurrence of at least one event. 1. A portable magnetic resonance imaging (MRI) system , comprising: a B0 magnet configured to provide a B0 field for the portable MRI system; and', 'gradient coils configured to provide gradient fields for the portable MRI system;, 'a plurality of magnetics components configured to produce magnetic fields for performing MRI, the plurality of magnetics components comprisinga power management system comprising one or more power components to provide power to the plurality of magnetics components to operate the portable MRI system to perform image acquisition; and wheels allowing the portable MRI system to be transported to different locations; and', 'a surface configured to support a patient during imaging., 'a housing containing the power management system, the housing comprising2. The portable magnetic resonance imaging system of claim 1 , further comprising a power connection configured to connect to a standard wall outlet.3. The portable magnetic resonance imaging system of claim 1 , wherein the Bmagnet comprises a bi-planar magnet.4. The portable magnetic resonance imaging system of claim 3 , wherein the bi-planar magnet comprises a hybrid magnet.5. The portable magnetic resonance imaging system of claim 1 , wherein:the plurality of magnetics components further comprises one or more radio frequency coils configured to transmit and/or receive magnetic resonance signals; andthe one or more power components comprises one or more amplifiers configured to ...

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Номер записи: 88
15-01-2015 дата публикации

Patient Bore With Integrated Radiofrequency Return Flux Space

Номер: US20150015261A1
Автор: Kimmlingen Ralph, Rietsch Norbert
Принадлежит:

The embodiments relate to a magnetic resonance imaging device, where the cladding of the patient bore of the MR imaging device includes a conductive layer. 1. A magnetic resonance imaging device comprising:a patient bore having cladding, wherein the cladding comprises a conductive layer.2. The magnetic resonance imaging device as claimed in claim 1 , wherein the conductive layer is arranged in claim 1 , or on claim 1 , the cladding claim 1 , andwherein the cladding surrounds the patient bore in a longitudinal direction, the cladding surrounds a circumference of the patient bore, or the cladding surrounds the patient bore in the longitudinal direction and the cladding surrounds the circumference of the patient bore.3. The magnetic resonance imaging device as claimed in claim 1 , wherein the conductive layer extends along a longitudinal direction of the patient bore.4. The magnetic resonance imaging device as claimed in claim 3 , wherein the conductive layer extends along more than 50% of a length of the patient bore in the longitudinal direction.5. The magnetic resonance imaging device as claimed in claim 4 , wherein the conductive layer is arranged in a region of an energy chain of the patient bore claim 4 , wherein the energy chain comprises radiofrequency transmission and reception lines.6. The magnetic resonance imaging device as claimed in claim 4 , wherein the conductive layer is connected in an electrically conductive manner to a system ground point of the magnetic resonance imaging device at a plurality of points.7. The magnetic resonance imaging device as claimed in claim 1 , wherein the conductive layer is arranged in the molded body or glass-fiber reinforced plastic tube of the patient bore.8. The magnetic resonance imaging device as claimed in claim 1 , wherein the conductive layer is arranged in a region of an energy chain of the patient bore claim 1 , wherein the energy chain comprises radiofrequency transmission and reception lines.9. The magnetic ...

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Номер записи: 89
18-01-2018 дата публикации

SYSTEMS AND METHODS FOR TARGETED DEEP HYPERTHERMIA BY TIME-SHARED RF INDUCTIVE APPLICATORS

Номер: US20180015294A1
Автор: Anderson, Jones Randall Wayne, JR. Charles Eric, Wandell Michael George
Принадлежит:

The present disclosure provides, inter alia, a system and methods for targeted hyperthermia effective to differentially heat target organs. In certain embodiments, the system and/or method utilizes one or more pairs of inductive applicators coupled to the one or more RF generators and configured to deposit radio frequency radiation on a region of interest based on a set of configurable parameters. 1. A system for targeted hyperthermia , the system comprising:one or more radio frequency (RF) generators; one or more pairs of inductive applicators coupled to the one or more RF generators and configured to deposit radio frequency radiation on a region of interest based on a set of configurable parameters; a temperature measuring device coupled to the one or more pairs of inductive applicators; and a hardware processor configured to receive temperature measurements from the temperature measuring device and cause a change on the set of configurable parameters of the one or more pairs of inductive applicators based on the received temperature measurements.2. The system of claim 1 , wherein the one or more pairs of inductive applicators utilize a hybrid drive by employing a local direct E-field and an E-field coupled to an H-field.3. The system of claim 1 , wherein the one or more pairs of inductive applicators operate in Helmholtz mode and are oriented in opposite sides causing H-field coupling and deep-seated E-field penetration.4. The system of claim 1 , wherein the one or more pairs of inductive applicators further comprise one or more semi-planar inductive loops that are configured to be temporally switched to provide targeted heating.5. The system of claim 1 , wherein the one or more pairs of inductive applicators further comprise one or more semi-planar inductive loops that are configured to be temporally switched to minimize superficial heating outside the region of interest.6. The system of claim 1 , wherein the one or more pairs of inductive applicators further ...

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Номер записи: 90
19-01-2017 дата публикации

BODY COIL

Номер: US20170016969A1
Автор: Eberler Ludwig, Matschl Volker, Nistler Jürgen
Принадлежит:

The embodiments relate to a body coil, to a magnetic resonance device, and to a method for operating a magnetic resonance device. The body coil includes at least one antenna unit and at least one pre-amplification unit, wherein the pre-amplification unit is arranged at a feed point of the antenna unit, wherein the pre-amplification unit has an input reflection factor at the feed point of the antenna unit whose value is greater than 0.7. 1. A body coil comprising:at least one antenna unit; andat least one pre-amplification unit,wherein the pre-amplification unit is arranged at a feed point of the antenna unit,wherein, at the feed point of the antenna unit, the pre-amplification unit has an input reflection factor whose value is greater than 0.7.2. The body coil of claim 1 , wherein the antenna unit is free from detune circuits.3. The body coil of claim 1 , wherein the body coil comprises a birdcage coil claim 1 , a TEM-antenna claim 1 , a saddle coil claim 1 , or a combination thereof.4. The body coil of claim 1 , wherein the body coil comprises a birdcage coil having at least one end ring and at least one rod claim 1 , andwherein the feed point is located at the at least one end ring, centrally on the at least one rod, or both at the at least one end ring and centrally on the at least one rod.5. The body coil of claim 1 , wherein the pre-amplification unit comprises a pre-amplifier claim 1 , andwherein the pre-amplifier has an input reflection factor whose value is greater than 0.7.6. The body coil of claim 5 , wherein the pre-amplification unit comprises a switch for connecting the pre-amplifier to the feed point of the antenna unit.7. The body coil of claim 1 , wherein the pre-amplification unit comprises high-power impedance.8. The body coil of claim 7 , wherein the high-power impedance has an input reflection factor whose value is greater than 0.7.9. The body coil of claim 7 , wherein the pre-amplification unit comprises a switch for connecting the high-power ...

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Номер записи: 91
21-01-2016 дата публикации

METHODS AND SYSTEMS RELATING TO HIGH RESOLUTION MAGNETIC RESONANCE IMAGING

Номер: US20160018489A1
Автор: FARIVAR-MOHSENI Reza
Принадлежит:

The inventors have established design principles for phased-array MRI coils from the considerations of the target region of the anatomy being evaluated and physical anatomy of the patients. Accordingly, the inventors have demonstrated shape-optimized phased array coils with dense packing of 32 channels for posterior-head imaging exhibiting the SNR gains required to realize not only sub-millimeter fMRI BOLD imaging but also allowing single-shot Gradient Echo-EPI imaging to be performed upon general 3 T MRI instruments. At the same time the design techniques address ergonomic considerations of the patient and designing shape-optimized phased-array MRI coils and patient supports that account for variations within the human population arising from factors such as race, gender, etc.

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Номер записи: 92
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.

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Номер записи: 93
21-01-2016 дата публикации

Measurement of NMR Characteristics of an Object Containing Fast Transversal Relaxation Components

Номер: US20160018493A1
Автор: Arcady Reiderman
Принадлежит: Individual

Nuclear magnetic resonance properties of a sample containing fast relaxation components are determined using direct detection of the longitudinal component of the nuclear magnetization. Excitation and detection can be performed in different frequency ranges, which enables short dead time of measurements. In some implementations a nuclear magnetic resonance apparatus can be configured for use in oil well logging.

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Номер записи: 94
21-01-2016 дата публикации

AUTOMATIC OPTIMIZATION OF PARALLEL IMAGING ACCELERATION PARAMETERS

Номер: US20160018498A1
Автор: Boernert Peter, DONEVA Mariya Ivanova, DUIJNDAM ADRIANUS JOSEPH WILLIBRORDUS, JURRISSEN MICHEL PAUL JURRIAAN, Nehrke Kay
Принадлежит:

A parallel magnetic resonance imaging system () includes at least one radio frequency (RF) coil () with a plurality of coil elements, a smart select unit (), a parallel imaging parameter unit (), and a sequence control (). The smart select unit (), from a pre-scan or prior scan of a subject with the at least one RF coil, constructs () a signal map and a plurality of noise maps based on different sets of reduction factors. The parallel imaging parameter unit () selects a set of reduction factors corresponding to a noise map which includes a highest signal-to-noise ratio (SNR). The sequence control () performs a magnetic resonance imaging scan of the subject based on the selected reduction factors. 1. A magnetic resonance imaging system , comprising:at least one radio frequency coil with a plurality of coil elements;a smart select unit the smart select unit constructing a signal map and a plurality of noise maps from a prior scan of a subject, the prior scan using the at least one radio frequency oil, wherein the noise maps are based on different sets of reduction factors along one or more reduction directions;a parallel imaging parameter unit which selects a set of reduction factors corresponding to a noise map which optimizes a signal-to-noise ratio and a scanning speed;a sequence control which performs a magnetic resonance imaging scan of the subject based on the selected reduction factors;a user interface which receives one of a maximum imaging time, an overall reduction factor, or a minimum signal-to-noise ratio; andwherein the smart select unit generates a plurality of sets of reduction factors,wherein the reduction factors are based on the received maximum imaging time or the received overall reduction factor.2. The system according to claim 1 , wherein the set of reduction factors includes two reduction factors for two reduction directions.3. (canceled)4. The system according to claim 1 , wherein the set of reduction factors include a plurality of reduction ...

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Номер записи: 95
21-01-2016 дата публикации

MAGNETIC RESONANCE IMAGING APPARATUS AND MAGNETIC RESONANCE IMAGING METHOD

Номер: US20160018500A1
Автор: MORITA Yoshinari, Shigeta Takashi, Takai Hiroshi, Watanabe Yoshiteru
Принадлежит:

According to one embodiment, an MRI apparatus includes a data acquiring unit and processing circuitry. The data acquiring unit acquires MR signals for imaging according to data acquiring conditions for acquiring MR signals multiple times following one excitation. The data acquiring unit also acquires reference MR signals for phase correction of real space data for imaging. The real space data are generated based on the MR signals for imaging. The processing circuitry is configured to calculate a phase error, in a real space region, of reference real space data and generate MR image data based on the MR signals for imaging with the phase correction of the real space data for imaging based on the calculated phase error. The reference real space data are generated based on the reference MR signals. The real space region is determined based on conditions of acquiring the reference MR signals or the like.

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Номер записи: 96
21-01-2016 дата публикации

MAGNETIC RESONANCE IMAGING APPARATUS AND CONTROL METHOD THEREOF

Номер: US20160018503A1
Автор: LEE Dae Ho
Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

A magnetic resonance imaging (MRI) apparatus includes a gantry including a bore, and an image output screen configured to rotate around the bore and output visual information to an object placed in the bore. 1. A magnetic resonance imaging (MRI) apparatus comprising:a gantry including a bore; andan image output screen configured to rotate around the bore and output visual information to an object placed in the bore.2. The magnetic resonance imaging apparatus of claim 1 , wherein the image output screen is configured to rotate according to a line of sight of the object.3. The magnetic resonance imaging apparatus of claim 1 , wherein the image output screen is provided inside the bore.4. The magnetic resonance imaging apparatus of claim 1 , wherein the image output screen is provided on a table configured to transfer the object to in and out the bore.5. The magnetic resonance imaging apparatus of claim 1 , further comprising:a light source configured to allow the visual information to be displayed inside the bore.6. The magnetic resonance imaging apparatus of claim 5 , further comprising:a support frame which is configured to support the light source, and has a shape corresponding to a shape of the bore such that the light source rotates along an inner surface of the bore.7. The magnetic resonance imaging apparatus of claim 1 , further comprising:a controller configured to control a rotation of the image output screen such that the visual information is displayed at a position corresponding to a line of sight of the object placed in the bore.8. The magnetic resonance imaging apparatus of claim 7 , wherein the controller is configured to determine a movement of the line of sight of the object based on a change in a posture of the object according to a magnetic resonance imaging protocol claim 7 , which is being executed.9. The magnetic resonance imaging apparatus of claim 7 , further comprising:a monitor configured to monitor a change in a posture of the object,wherein ...

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Номер записи: 97
18-01-2018 дата публикации

RADIATION-TRANSPARENT, LOW-COST, LIGHTWEIGHT, VERSATILE, COMPOSITE RADIO FREQUENCY COIL FOR MRI

Номер: US20180017642A1
Автор: Lips Oliver, Uhlemann Falk
Принадлежит:

A radio frequency coil (), for use in a medical modality including at least a magnetic resonance examination system (), comprises: a right hollow cylinder-shaped patient bore lining (), an inner carrier member () that is fixedly attached to an outwardly directed surface of the patient bore lining (), a radio frequency antenna (), fixedly attached to an antenna carrier member () made from a composite material, which in turn is fixedly attached to an outwardly directed surface of the inner carrier member (), at least one outer carrier spacer member (), arranged on at least one out of the at least one radio frequency antenna () or an outwardly directed surface of the antenna carrier member (), and providing a free end-to-end space () in a direction parallel to the center axis () of the patient bore lining (), a right hollow cylinder-shaped outer carrier member () with a center axis (), which in an operational state is arranged in parallel to the center axis () of the patient bore lining (), and is in mechanical contact with outwardly directed surfaces of the outer carrier spacer members (), and a shell member () that is in mechanical contact with an outwardly directed surface of the outer carrier member (); and a medical modality including at least a magnetic resonance examination system () with such radio frequency coil (). 1. A radio frequency coil for use in a medical modality including at least a magnetic resonance examination system , and configured for being arranged within an examination space of the magnetic resonance examination system , wherein a main magnet is configured for generating a static magnetic field Bat least within the examination space , the radio frequency coil comprising:a patient bore lining having the shape of a right hollow cylinder with a center axis,an inner carrier member that is in mechanical contact with at least a major part of an outwardly directed surface of the patient bore lining and is fixedly attached to the patient bore lining, ...

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Номер записи: 98
18-01-2018 дата публикации

SIZE-VARIABLE LOCAL COIL MATRIX WITH VARIABLE DECOUPLING

Номер: US20180017643A1
Автор: Zink Stephan
Принадлежит:

A local coil matrix for a magnetic resonance tomograph and a magnetic resonance tomograph with a local coil matrix are provided. The local coil matrix has a first coil with two detachable coil segments. The two coil segments have electrical connecting elements. The electrical connecting elements are configured to produce an electrical connection between the coil segments in different relative positions of the two coil segments to each other. 1. A local coil matrix for a magnetic resonance tomograph , the local coil matrix comprising:a first coil having two detachable coil segments,wherein the two coil segments have electrical connecting elements configured to produce an electrical connection between the two coil segments in different relative positions of the two coil segments to each other.2. The local coil matrix of claim 1 , wherein the first coil is a flexible coil.3. The local coil matrix of claim 2 , wherein the electrical connecting elements are configured to produce an electrical connection only at discrete claim 2 , predetermined relative positions claim 2 , spatially separated from each other.4. The local coil matrix of claim 1 , wherein the electrical connecting elements are configured to produce an electrical connection only at discrete claim 1 , predetermined relative positions claim 1 , spatially separated from each other.5. The local coil matrix of claim 1 , further comprising:a first tuning device having a tuning element,wherein the tuning device is configured to tune a resonance circuit, which the first coil has in different relative positions of the coil segments of the first coil, to a predetermined resonance frequency.6. The local coil matrix of claim 5 , wherein the electrical connection elements are configured in a first relative position of the different relative positions to activate the first tuning device such that the resonance circuit is tuned to the predetermined resonance frequency.7. The local coil matrix of claim 6 , further ...

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Номер записи: 99
17-01-2019 дата публикации

MAGNETIC RESONANCE COIL AND MAGNETIC RESONANCE IMAGING SYSTEM USING THE SAME

Номер: US20190018089A1
Автор: CHE Shao, JI Ling, YAO Yunlei
Принадлежит: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.

A magnetic resonance coil and a magnetic resonance imaging system using the same are provided. The magnetic resonance coil may include an antenna and a signal processor. The antenna may be configured to receive a radio frequency (RF) signal emitted from an object, wherein the antenna does not resonate with the RF signal. The signal processor may be coupled to the antenna configured to process the RF signal to generate a processed signal. 1. A magnetic resonance coil , comprising:an antenna configured to receive a radio frequency (RF) signal emitted from an object, wherein the antenna does not resonate with the RF signal; anda signal processor coupled to the antenna configured to process the RF signal to generate a processed signal.2. The magnetic resonance coil of claim 1 , wherein the antenna is a non-resonant antenna.3. The magnetic resonance coil of claim 1 , wherein the antenna is made of one or more deformable conductive materials.4. The magnetic resonance coil of claim 1 , wherein the antenna is a birdcage structure configured to receive the RF signal from an entire body of the object.5. The magnetic resonance coil of claim 1 , wherein the antenna is a loop structure configured to receive the RF signal from a portion of the object.6. The magnetic resonance coil of claim 1 , wherein the signal processor comprises:an amplifier coupled to the antenna and configured to amplify the RF signal.7. The magnetic resonance coil of claim 6 , wherein the amplifier is a differential amplifier.8. The magnetic resonance coil of claim 6 , further comprising:a matching circuit coupled between the antenna and the amplifier and configured to match an impedance of the antenna and an impedance of the amplifier.9. The magnetic resonance coil of claim 8 , wherein the matching circuit is a broadband matching circuit that matches the impedance of the antenna and the impedance of the amplifier over a frequency range of the broadband signals.10. The magnetic resonance coil of claim 6 , ...

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Номер записи: 100