Multi-nuclear receiving coils for magnetic resonance imaging (MRI)

A system includes a multi-nuclear magnetic resonance (MR) receiving coil, wherein the receiving coil includes a frequency tuning component configured operate the receiving coil at either a first frequency or a second frequency. The receiving coil also includes an impedance matching component configured to maintain a substantially constant impedance of the receiving coil when the receiving coil is operated at either the first frequency or the second frequency. Furthermore, the receiving coil is configured to measure a first nucleus when operated at the first frequency, and wherein the receiving coil is configured to measure a second nucleus when operated at the second frequency.

Transformer assembly for a magnetic resonance imaging system

A transformer assembly includes a substrate having a first surface and an opposing second surface, a first spiral wound inductive coil formed on the first surface, a second spiral wound inductive coil formed on the first surface, and a third spiral wound inductive coil formed on the first surface, the first, second and third spiral wound inductive coils forming a triple spiral arrangement on the first surface such that the first coil is inductively coupled to the second coil and the third coil. An RF coil including the transformer assembly and a method of fabricating the transformer assembly are also described.

Dual-frequency coil array for a magnetic resonance imaging (MRI) system

A dual-frequency coil array for a magnetic resonance imaging (MRI) system is provided. The coil array includes a first coil element having a pair of dual-frequency loop coils and a second coil element having a pair of dual-frequency loop coils. The coil array further includes at least one capacitive mesh configured to decouple the pairs of dual-frequency loop coils of the first and second coil elements.

Magnetic resonance radio-frequency coil and method of manufacturing

A Magnetic Resonance (MR) Radio-Frequency (RF) coil and method of manufacturing are provided for a multi-modality imaging system. The multi-modality imaging system includes a Magnetic Resonance (MR) scanner portion configured to acquired MR data of a patient using one or more MR Radio-Frequency (RF) coils. The one or more MR RF coils are formed from carbon nanotube conductors. The multi-modality imaging system also includes a radiation potion configured to transmit radiation through or detect radiation from the patient.

TRANSFORMER ASSEMBLY FOR A MAGNETIC RESONANCE IMAGING SYSTEM

A transformer assembly includes a substrate having a first surface and an opposing second surface, a first spiral wound inductive coil formed on the first surface, and a second spiral wound inductive coil formed on the first surface; the first and second spiral wound inductive coils forming a double spiral arrangement on the first surface such that the first coil is inductively coupled to the second coil. An RF coil including the transformer assembly and a method of fabricating the transformer assembly are also described.

RADIO-FREQUENCY COIL ARRAYS AND METHODS OF ARRANGING THE SAME

In accordance with various embodiments, a radio frequency (RF) coil array for use in a magnetic resonance imaging (MRI) system includes at least first and second RF coils. Each of the RF coils have a main body loop configured to at least one of transmit or receive RF energy at an operating imaging frequency in connection with acquiring MRI image data for an MRI system. The RF coil array also includes first and second cables configured to electrically couple the first and second RF coils, respectively, to a system interface. The RF coil array also includes a common ground connection between the first and second cables. The common ground connection is selectively positioned at a grounding point along lengths of the first and second cables to form a ground loop having a select self-resonance frequency (SRF) that differs from the imaging frequency of the MRI system. 1. A radio frequency (RF) coil array for use in a magnetic resonance imaging (MRI) system , the RF coil array comprising:at least first and second RF coils, each having a main body loop configured to at least one of transmit or receive RF energy at an operating imaging frequency in connection with acquiring MRI image data for an MRI system;first and second cables configured to electrically couple the first and second RF coils, respectively, to a system interface; anda common ground connection between the first and second cables having selectively positioned at a grounding point along lengths of the first and second cables to form a ground loop having a select self-resonance frequency (SRF) that differs from the imaging frequency of the MRI system.2. The RF coil array of claim 1 , wherein the RF energy includes a wavelength claim 1 , the location of the grounding point based on the wavelength.3. The RF coil array of claim 2 , wherein the grounding point is located at a distance approximately one-fourth of the wavelength extending from the main body loop of at least one of the first or the second RF coils.4. ...

MULTI-NUCLEAR RECEIVING COILS FOR MAGNETIC RESONANCE IMAGING (MRI)

A system includes a multi-nuclear magnetic resonance (MR) receiving coil, wherein the receiving coil includes a frequency tuning component configured operate the receiving coil at either a first frequency or a second frequency. The receiving coil also includes an impedance matching component configured to maintain a substantially constant impedance of the receiving coil when the receiving coil is operated at either the first frequency or the second frequency. Furthermore, the receiving coil is configured to measure a first nucleus when operated at the first frequency, and wherein the receiving coil is configured to measure a second nucleus when operated at the second frequency. 1. A system , comprising: a frequency tuning component configured operate the receiving coil at either a first frequency or a second frequency; and', 'an impedance matching component configured to maintain a substantially constant impedance of the receiving coil when the receiving coil is operated at either the first frequency or the second frequency;, 'a multi-nuclear magnetic resonance (MR) receiving coil, wherein the receiving coil compriseswherein the receiving coil is configured to measure a first nucleus when operated at the first frequency, and wherein the receiving coil is configured to measure a second nucleus when operated at the second frequency.2. The system of claim 1 , wherein the frequency tuning component comprises a microelectromechanical system (MEMS) switch coupled to a capacitor claim 1 , wherein the frequency tuning component is configured to operate the receiving coil at the first frequency when the MEMS switch is open and to operate the receiving coil at the second frequency when the MEMS switch is closed.3. The system of claim 1 , wherein the impedance matching component comprises a capacitance matching portion configured to provide either a first capacitance or a second capacitance to maintain the substantially constant impedance of the receiving coil.4. The system of ...

QUARTER WAVE BALUN FOR MAGNETIC RESONANCE IMAGING SYSTEMS

A balun assembly includes a body portion having an opening extending therethrough, the opening sized to receive at least one radio-frequency (RF) cable therethrough, the RF cable transmitting a signal therethrough a signal having a wavelength, and a balun disposed within the body portion, the balun being folded to form a plurality of layers, the combined length of the layers being approximately equal to a quarter wavelength of the signal transmitted through the RF cable. A method of fabricating a balun assembly and an MRI system including a balun are also provided.

MAGNETIC RESONANCE RADIO-FREQUENCY COIL AND METHOD OF MANUFACTURING

A Magnetic Resonance (MR) Radio-Frequency (RF) coil and method of manufacturing are provided for a multi-modality imaging system. The multi-modality imaging system includes a Magnetic Resonance (MR) scanner portion configured to acquired MR data of a patient using one or more MR Radio-Frequency (RF) coils. The one or more MR RF coils are formed from carbon nanotube conductors. The multi-modality imaging system also includes a radiation potion configured to transmit radiation through or detect radiation from the patient. 1. A multi-modality imaging system comprising:a Magnetic Resonance (MR) scanner portion configured to acquire MR data of a patient using one or more MR Radio-Frequency (RF) coils, the one or more MR RF coils formed from carbon nanotube conductors; anda radiation potion configured to transmit radiation through or detect radiation from the patient.2. The multi-modality imaging system of claim 1 , wherein the radiation comprises X-ray radiation transmitted from an X-ray radiation source of the radiation portion.3. The multi-modality imaging system of claim 1 , wherein the radiation comprises gamma radiation emitted as gamma rays from the patient.4. The multi-modality imaging system of claim 1 , wherein claim 1 , the radiation portion comprises one of a Computed Tomography (CT) scanner claim 1 , a Positron Emission Tomography (PET) scanner claim 1 , a Single-Photon Emission Computed Tomography (SPECT) scanner claim 1 , a radiotherapy system claim 1 , or an X-ray fluoroscopy system.5. The multi-modality imaging system of claim 1 , wherein the carbon nanotube conductors comprise carbon nanotube based ballistic conductors.6. The multi-modality imaging system of claim 1 , wherein the carbon nanotube conductors comprise bundled strands of carbon nanotube conductors.7. The multi-modality imaging system of claim 6 , wherein the bundled strands comprise twisted carbon nanotubes.8. The multi-modality imaging system of claim 1 , wherein the carbon nanotube ...

RADIO-FREQUENCY TRAPS AND METHODS OF COMMON-MODE ENERGY DAMPING

Radio-frequency (RF) traps and methods of common-mode energy damping are provided. One RF trap includes a body and a shutter holder rotatably coupled within the body, wherein the shutter holder is configured to rotate within the body about a longitudinal axis. The RF trap further including a magnetic flux shutter coupled to the shutter holder, wherein the magnetic flux shutter rotates within the body with the shutter holder to align the magnetic flux shutter at an angle within the body. 1. A radio-frequency (RF) trap comprising:a body;a shutter holder rotatably coupled within the body, the shutter holder configured to rotate within the body about a longitudinal axis; anda magnetic flux shutter coupled to the shutter holder, the magnetic flux shutter rotating within the body with the shutter holder to align the magnetic flux shutter at an angle within the body.2. The RE trap of claim 1 , wherein the body comprises a cavity receiving the shutter holder therein claim 1 , the cavity offset from a central longitudinal axis of the body.3. The RF trap of claim 1 , wherein the shutter holder is coupled within the body in an axially fixed position.4. The RF trap of claim 1 , wherein the shutter holder is configured to rotate 180 degrees within the body.5. The RF trap of claim 1 , wherein the body comprises a base and a cover claim 1 , each having a channel that together form a cavity claim 1 , the cavity receiving the shutter holder therein.6. The RE trap of claim 5 , wherein the shutter holder comprises a rotatable member having at least one annular flange and the cavity includes at least one annular groove receiving the annular flange therein and allowing rotational movement of the shutter holder within the cavity.7. The RF trap of claim 1 , wherein the shutter holder comprise a base having a recess claim 1 , the magnetic flux shutter coupled within the recess claim 1 , and further comprising a cover claim 1 , the magnetic flux shutter positioned between the base and the ...

Neck coil arrangements for magnetic resonance imaging

Systems and methods for coil arrangements in Magnetic Resonance Imaging (MRI) are provided. One arrangement includes a magnet bore, a radio-frequency (RF) transmit coil coupled to the magnet bore and at least one RF neck coil coupled to the magnet bore. The RF neck coil is movable within the magnet bore under and separate from a table within the magnet bore.

DUAL-FREQUENCY COIL ARRAY FOR A MAGNETIC RESONANCE IMAGING (MRI) SYSTEM

A dual-frequency coil array for a magnetic resonance imaging (MRI) system is provided. The coil array includes a first coil element having a pair of dual-frequency loop coils and a second coil element having a pair of dual-frequency loop coils. The coil array further includes at least one capacitive mesh configured to decouple the pairs of dual-frequency loop coils of the first and second coil elements.

Systems and methods for coil arrangements in magentic resonance imaging

Systems and methods for coil arrangements in Magnetic Resonance Imaging (MRI) are provided. One coil arrangement includes a magnet bore, a radio-frequency (RF) transmit coil coupled to the magnet bore, and at least one RF receive coil coupled to the magnet bore. The RF receive coil is movable within the magnet bore.

Radio-frequency coil arrays and methods of arranging the same

In accordance with various embodiments, a radio frequency (RF) coil array for use in a magnetic resonance imaging (MRI) system includes at least first and second RF coils. Each of the RF coils have a main body loop configured to at least one of transmit or receive RF energy at an operating imaging frequency in connection with acquiring MRI image data for an MRI system. The RF coil array also includes first and second cables configured to electrically couple the first and second RF coils, respectively, to a system interface. The RF coil array also includes a common ground connection between the first and second cables. The common ground connection is selectively positioned at a grounding point along lengths of the first and second cables to form a ground loop having a select self-resonance frequency (SRF) that differs from the imaging frequency of the MRI system.

Radio-frequency traps and methods of common-mode energy damping

Radio-frequency (RF) traps and methods of common-mode energy damping are provided. One RF trap includes a body and a shutter holder rotatably coupled within the body, wherein the shutter holder is configured to rotate within the body about a longitudinal axis. The RF trap further including a magnetic flux shutter coupled to the shutter holder, wherein the magnetic flux shutter rotates within the body with the shutter holder to align the magnetic flux shutter at an angle within the body.

Systems and methods for coil arrangements in magnetic resonance imaging

Systems and methods for coil arrangements in Magnetic Resonance Imaging (MRI) are provided. One coil arrangement includes a magnet bore, a radio-frequency (RF) transmit coil coupled to the magnet bore, and at least one RF receive coil coupled to the magnet bore. The RF receive coil is movable within the magnet bore.

Flexible radio frequency coil array with detachable straps for MR imaging

Methods and systems are provided for radio frequency (RF) coil arrays for magnetic resonance imaging (MRI) systems. In an embodiment, a RF coil array assembly for a MRI system includes a compressible body; an upper posterior RF coil array including a first plurality of RF coils embedded in the compressible body; a lower posterior RF coil array including a second plurality of RF coils embedded in the compressible body; and a head and neck RF coil array removably coupled to the upper posterior RF coil array. The head and neck RF coil array includes a third plurality of RF coils embedded in the compressible body, and one or more neck straps configured to fold over a neck of a subject to be imaged by the MRI system.

Transformer assembly for a magnetic resonance imaging system

A transformer assembly includes a substrate having a first surface and an opposing second surface, a first spiral wound inductive coil formed on the first surface, and a second spiral wound inductive coil formed on the first surface; the first and second spiral wound inductive coils forming a double spiral arrangement on the first surface such that the first coil is inductively coupled to the second coil. An RF coil including the transformer assembly and a method of fabricating the transformer assembly are also described.

NECK COIL ARRANGEMENTS FOR MAGNETIC RESONANCE IMAGING

Systems and methods for coil arrangements in Magnetic Resonance Imaging (MRI) are provided. One arrangement includes a magnet bore, a radio-frequency (RF) transmit coil coupled to the magnet bore and at least one RF neck coil coupled to the magnet bore. The RF neck coil is movable within the magnet bore under and separate from a table within the magnet bore.

Adjustable head coil systems and methods for magnetic resonance imaging

A system for magnetic resonance imaging of anatomy including a head is provided. The system includes a base member, a plurality of support members, and a plurality of articulable reception units. The plurality of support members are movably fixed to the base member and configured to translate across a surface of the base member. Each support member is releasably securable to the base member in a plurality of positions along the surface of the base member. The articulable reception units are movable from an open position to a plurality of closed positions. Each reception unit comprises at least one radio frequency (RF) receive coil disposed within a body, with the body configured for abutment with a portion of a head. Each of the plurality of articulable reception units is releasably secured in the plurality of closed positions by at least one of the plurality of support members.

ADJUSTABLE MRI HEAD COIL APPARATUS AND MRI SYSTEM

An adjustable MRI head coil apparatus includes a plurality of plates. Each of the plurality of plates includes a plurality of RF receive elements arranged in a fixed orientation. The adjustable MRI head coil apparatus also includes a support coupled to at least one of the plurality of plates. The support includes a ball head mechanism configured to allow tilting of the adjustable MRI head coil apparatus in a least one direction. 1. An adjustable MRI head coil apparatus comprising:a plurality of plates, each of the plurality of plates comprising a plurality of RF receive elements arranged in a fixed orientation; anda support coupled to at least one of the plurality of plates, the support comprising a ball head mechanism configured to allow tilting of the adjustable MRI head coil apparatus in a least one direction.2. An adjustable MRI head coil apparatus according to claim 1 , wherein the plurality of plates comprises a back plate adapted to fit on a back of a patient's head and the support is coupled to the back plate.3. An adjustable MRI head coil apparatus according to claim 2 , therein the plurality of plates comprises a front plate adapted to fit on a front of the patient's head.4. An adjustable MR head coil apparatus according to claim 3 , wherein the front plate is coupled to the back plate by a first hinged arm.5. An adjustable MRI head coil apparatus according to claim 3 , wherein the plurality of plates comprises a left plate adapted to fit on a left die of the patient's head.6. An adjustable MRI head coil apparatus according to claim 5 , wherein the left plate is coupled to the back plate by a second hinged arm.7. An adjustable MRI head coil apparatus according to claim 5 , wherein the plurality of plates comprises a right plate adapted to fit on a right side of the patient's head.8. An adjustable MRI head coil apparatus according to claim 7 , wherein the right plate is coupled to the back plate by a third hinged arm.9. An adjustable MRI head coil apparatus ...

Quarter wave balun for magnetic resonance imaging systems

A balun assembly includes a body portion having an opening extending therethrough, the opening sized to receive at least one radio-frequency (RF) cable therethrough, the RF cable transmitting a signal therethrough a signal having a wavelength, and a balun disposed within the body portion, the balun being folded to form a plurality of layers, the combined length of the layers being approximately equal to a quarter wavelength of the signal transmitted through the RF cable. A method of fabricating a balun assembly and an MRI system including a balun are also provided.

ADJUSTABLE HEAD COIL SYSTEMS AND METHODS FOR MAGNETIC RESONANCE IMAGING

A system for magnetic resonance imaging of anatomy including a head is provided. The system includes a base member, a plurality of support members, and a plurality of articulable reception units. The plurality of support members are movably fixed to the base member and configured to translate across a surface of the base member. Each support member is releasably securable to the base member in a plurality of positions along the surface of the base member. The articulable reception units are movable from an open position to a plurality of closed positions. Each reception unit comprises at least one radio frequency (RF) receive coil disposed within a body, with the body configured for abutment with a portion of a head. Each of the plurality of articulable reception units is releasably secured in the plurality of closed positions by at least one of the plurality of support members. 1. A system for magnetic resonance imaging (MRI) of anatomy including a head , the system comprising:a base member removably mountable to an MRI table, the base member configured to support at least one of an upper body and a head;a plurality of support members movably fixed to the base member and configured to translate across a surface of the base member, the support members releasably securable to the base member in a plurality of positions along the surface of the base member; anda plurality of articulable reception units movable from an open position to a plurality of closed positions, wherein the open position corresponds to a position wherein a head may be inserted or removed between the articulable reception units, and the plurality of closed positions correspond to a respective plurality of positions wherein the articulable reception units are proximate to a corresponding respective plurality of differently sized heads, each articulable reception unit comprising at least one radio frequency (RF) receive coil disposed within a body, the body configured for abutment with a portion of ...

INDUCTOR ASSEMBLY FOR A MAGNETIC RESONANCE IMAGING SYSTEM

An inductor assembly includes a substrate having a first surface and an opposing second surface, a first spiral electrical conductor formed on the first surface, a second spiral electrical conductor formed on the second surface, at least one opening extending through the first and second surfaces, and a metallic pin configured to be inserted in the opening, the pin coupling the first conductor to the second conductor. An RF coil including the inductor assembly and a method of fabricating an inductor assembly are also described.

Method and apparatus to improve signal-to-noise ratio without compromising field-of-view for simultaneous MR data acquisition by an array of RF coils of an MR scanner

A method and apparatus is disclosed to analogically combine MR signals from RF coils to form multiple sets of analogically combined MR signals, and then digitally combine the analogically combined sets of MR signals to provide a digitized signal set for image reconstruction. The analogical combining followed by the digital combining of acquired MR signals improves intrinsic SNR of the RF coils used for data acquisition from a field-of-view (FOV) without compromising FOV for simultaneous MR data acquisition.

RF coil array for cardiac and thoracic magnetic resonance imaging

A radio frequency (RF) coil array includes a first coil section and a second coil section mechanically coupled to the first coil section. The first coil section includes a first row of a plurality of double asymmetric saddle coil pairs arranged in a left-right direction and a second row of a plurality of double asymmetric saddle coil pairs arranged in a left-right direction. The first row and the second row are arranged along a superior-inferior direction. The second coil section includes a plurality of loop coils arranged around at least a portion of a perimeter of the first coil section.

SYSTEMS AND METHODS FOR COIL ARRANGEMENTS IN MAGENTIC RESONANCE IMAGING

Systems and methods for coil arrangements in Magnetic Resonance Imaging (MRI) are provided. One coil arrangement includes a magnet bore, a radio-frequency (RF) transmit coil coupled to the magnet bore, and at least one RF receive coil coupled to the magnet bore. The RF receive coil is movable within the magnet bore.

RF COIL ARRAY FOR CARDIAC AND THORACIC MAGNETIC RESONANCE IMAGING

A radio frequency (RF) coil array includes a first coil section and a second coil section mechanically coupled to the first coil section. The first coil section includes a first row of a plurality of double asymmetric saddle coil pairs arranged in a left-right direction and a second row of a plurality of double asymmetric saddle coil pairs arranged in a left-right direction. The first row and the second row are arranged along a superior-inferior direction. The second coil section includes a plurality of loop coils arranged around at least a portion of a perimeter of the first coil section.

SYSTEM AND METHOD PROVIDING PREAMPLIFIER FEEDBACK FOR MAGNETIC RESONANCE IMAGING

A system and method for generating preamplifier feedback in magnetic resonance imaging (MRI) systems are provided. A preamplifier arrangement for the MRI system includes a plurality of preamplifiers with each of the preamplifiers connected to a different channel of a multi-channel coil array of the MRI system. The preamplifier arrangement further includes a feedback network connected to each of the plurality of preamplifiers with each of the feedback networks configured to generate negative feedback at one or more oscillation frequencies.

Open peripheral vascular coil and method of providing peripheral vascular imaging

An open peripheral vascular coil and method of providing peripheral vascular imaging are provided. The peripheral vascular coil includes a base coil section having a plurality of coil elements and a plurality of coil sections configured for removable attachment to the base coil section. Each of the plurality of coil sections includes a plurality of coil elements.

System and method for magnetic resonance imaging one or more subjects

An MRI system for imaging one or more subjects is provided. The MRI system includes a magnet assembly and an MRI controller. The magnet assembly includes an RF coil for transmitting a first set of RF pulses into the one or more subjects at an initial Larmor frequency. The MRI controller is configured to electronically communicate with the RF coil and to adjust a resonant frequency of the RF coil such that the RF coil transmits a second set of RF pulses into the one or more subjects at one or more subsequent Larmor frequencies that are different from the initial Larmor frequency.

SYSTEM AND APPARATUS FOR A HIGH RESOLUTION PERIPHERAL VASCULAR COIL ARRAY

A peripheral vascular coil array for providing images of a region of interest includes a first section including a first coil array and a second coil array in electrical communication with each other. The first and second coil arrays are disposed at opposite sides of the region of interest to produce a magnetic field in the region of interest. Each of the first and second coil arrays includes a butterfly coil and a loop coil.

Transformer assembly for a magnetic resonance imaging system

A transformer assembly includes a substrate having a first surface and an opposing second surface, a first spiral wound inductive coil formed on the first surface, a second spiral wound inductive coil formed on the first surface, and a third spiral wound inductive coil formed on the first surface, the first, second and third spiral wound inductive coils forming a triple spiral arrangement on the first surface such that the first coil is inductively coupled to the second coil and the third coil. An RF coil including the transformer assembly and a method of fabricating the transformer assembly are also described.

INDUCTOR ASSEMBLY FOR A MAGNETIC RESONANCE IMAGING SYSTEM

An inductor assembly includes an electrical conductor having a first end and an opposite second end, and a plurality of turns, each turn having a first lobe and a second lobe, the electrical conductor being formed into a lemniscate shape. A Radio Frequency (RF) coil including the lemniscate shaped inductor and a Magnetic Resonance Imaging (MRI) system including the lemniscate shaped inductor are also described herein. 1. An inductor comprising:an electrical conductor having a first end and an opposite second end; anda plurality of turns, each turn having a first lobe and a second lobe, the electrical conductor being formed into a lemniscate shape.2. An inductor in accordance with further comprising an opening extending therethrough claim 1 , the opening being sized to receive an RF cable therethrough.3. An inductor in accordance with wherein the first and second ends are configured to be electrically coupled to a capacitor.4. An inductor in accordance with wherein the a magnetic flux if the first lobe is oriented in a first direction and the magnetic flux in the second lobe is oriented in an opposite second direction.5. An inductor in accordance with wherein the magnetic flux generated in the first lobe is substantially the same as the magnetic flux generated in the second lobe such that the magnetic flux in the first lobe substantially cancels the magnetic flux in the second lobe.6. An inductor in accordance with wherein the first lobe is symmetrical with the second lobe.7. An inductor in accordance with wherein the inductor comprises N figure 8 turns claim 1 , the quantity of turns based on a predetermined inductance value.8. A Radio Frequency (RF) coil comprising:a capacitor; andan inductor coupled to the capacitor, the inductor assembly includingan electrical conductor having a first end and an opposite second end; anda plurality of turns, each turn having a first lobe and a second lobe, the electrical conductor being formed into a lemniscate shape.9. The RF ...

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

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.

ADJUSTABLE MRI HEAD COIL APPARATUS AND MRI SYSTEM

An adjustable MRI head coil apparatus and MRI system include a fixture and a plurality of plates attached to the fixture. Each of the plurality of plates includes a plurality of RF receive elements arranged in a fixed orientation. The adjustable MRI head coil apparatus and MRI system also include an actuator mechanism configured to adjust the relative position of each of the plurality of plates in order to fit a variety of different patient head sizes. 1. An adjustable MRI head coil apparatus comprising:a fixture;a plurality of plates, each of the plurality of plates comprising a plurality of RF receive elements arranged in a fixed orientation, wherein each of the plurality of plates is attached to the fixture; andan actuator mechanism configured to adjust the relative position of each of the plurality of plates in order to allow the plurality of plates to fit a variety of different patient head sizes.2. The adjustable MRI head coil apparatus of claim 1 , wherein the plurality of plates comprises a front plate adapted to fit on the front of a patient's head.3. The adjustable MRI head coil apparatus of claim 2 , wherein the plurality of plates comprises a left plate adapted to fit on the left side of the patient's head.4. The adjustable MRI head coil apparatus of claim 3 , wherein the plurality of plates comprises a right plate adapted to fit on the right side of the patient's head.5. The adjustable MRI head coil apparatus of claim 4 , wherein the plurality of plates comprises a back plate adapted to fit on the back of the patient's head.6. The adjustable MRI head coil apparatus of claim 5 , wherein the front plate claim 5 , the back plate claim 5 , the left plate claim 5 , and the right plate comprise complementary shapes that fit together in order to substantially surround the patient's head.7. The adjustable MRI head coil apparatus of claim 1 , further comprising an arm attached to the fixture and a base claim 1 , wherein the arm is adapted to be translated along ...

Systems and methods for coil arrangements in magnetic resonance imaging

Systems and methods for coil arrangements in Magnetic Resonance Imaging (MRI) are provided. One coil arrangement includes a magnet bore, a radio-frequency (RF) transmit coil coupled to the magnet bore, and at least one RF receive coil coupled to the magnet bore. The RF receive coil is movable within the magnet bore.

SYSTEMS AND METHODS FOR DISCONNECTING AN MRI RF COIL

Various methods and systems are provided for a disconnecting a receive coil from a transmit coil of a magnetic resonance (MR) system during a transmit operation. In one example, a cabling system may include a first line of coil-interfacing cable having a first set of hybrid switches, the first set of hybrid switches including a first switch, a first resonance circuit, and a second switch connected in series, and a second line of the coil-interfacing cable having a second set of hybrid switches, the first line and the second line of the coil-interfacing cable operably coupling one or more radio frequency (RF) coil elements to respective channels of the MR system. By positioning the first and the second sets of hybrid switches along different locations along the coil-interfacing cables, and simultaneously operating each set of hybrid switches, common mode currents may be interrupted along the coil-interfacing cables. 1. A cabling system , comprising:a first line of a coil-interfacing cable having a first set of hybrid switches, the first set of hybrid switches including a first switch, a first resonance circuit, and a second switch connected in series; anda second line of the coil-interfacing cable having a second set of hybrid switches, the first line and the second line of the coil-interfacing cable operably coupling one or more radio frequency (RF) coil elements to respective channels of a magnetic resonance (MR) system.2. The cabling system of claim 1 , wherein the second set of hybrid switches includes a third switch claim 1 , a second resonance circuit claim 1 , and a fourth switch coupled in series with the second line of the coil-interfacing cable claim 1 , and wherein each of the first resonance circuit and the second resonance circuit includes discrete capacitors and inductors.3. The cabling system of claim 2 , wherein each of the first switch claim 2 , second switch claim 2 , third switch claim 2 , and fourth switch includes one or more of a ...

SYSTEMS AND METHODS FOR A RADIO FREQUENCY COIL FOR MR IMAGING

Various methods and systems are provided for a flexible, lightweight, and low-cost radio frequency (RF) coil of a magnetic resonance imaging (MM) system with reduced power dissipation during decoupling. In one example, the RF coil includes a loop portion with distributed capacitance which comprises two conductor wires encapsulated and separated by a dielectric material and a feed board including a decoupling circuit configured to decouple the distributed capacitance of the loop portion during a transmit operation, an impedance inverter circuit, and a pre-amplifier. 1. A radio frequency (RF) coil assembly for a magnetic resonance imaging (MRI) system , comprising:a loop portion with distributed capacitance which comprises two conductor wires encapsulated and separated by a dielectric material; and a decoupling circuit configured to decouple the distributed capacitance of the loop portion during a transmit operation;', 'an impedance inverter circuit; and', 'a pre-amplifier., 'a feed board comprising2. The RF coil assembly of claim 1 , wherein the decoupling circuit comprises a first diode coupled to an end of a first wire of the two conductor wires claim 1 , a second diode coupled to an end of a second wire of the two conductor wires claim 1 , and an inductor between the end of the first wire and the end of the second wire.3. The RF coil assembly of claim 2 , wherein the first diode and the second diode are turned on by applying a voltage during the transmit operation of the MRI system.4. The RF coil assembly of claim 1 , wherein the decoupling circuit comprises a diode coupled to an end of a first wire of the two conductor wires claim 1 , and an inductor between the end of the first wire and an end of the second wire.5. The RF coil assembly of claim 1 , wherein the impedance inverter circuit comprises an impedance matching network and an input balun claim 1 , wherein the pre-amplifier comprises a low input impedance pre-amplifier for high source impedance claim 1 , ...

Methods and systems for a floating cable trap

Various methods and systems are provided for a current trap. In one example, the current trap has a spiral core made of a nonconductive material, a coiled wire having a plurality of turns wound around the spiral core, and one or more tuning capacitors physically attached to the spiral core and electrically connected to the coiled wire to form a resonance circuitry with the coiled wire.

SYSTEM AND METHOD FOR MAGNETIC RESONANCE IMAGING ONE OR MORE SUBJECTS

An MRI system for imaging one or more subjects is provided. The MRI system includes a magnet assembly and an MRI controller. The magnet assembly includes an RF coil for transmitting a first set of RF pulses into the one or more subjects at an initial Larmor frequency. The MRI controller is configured to electronically communicate with the RF coil and to adjust a resonant frequency of the RF coil such that the RF coil transmits a second set of RF pulses into the one or more subjects at one or more subsequent Larmor frequencies that are different from the initial Larmor frequency. 1. An MRI system for imaging one or more subjects comprising:a magnet assembly that includes an RF coil for transmitting a first set of RF pulses into the one or more subjects at an initial Larmor frequency;an MRI controller configured to electronically communicate with the RF coil; andwherein the MRI controller is further configured to tune a resonant frequency of the RF coil such that the RF coil transmits a second set of RF pulses into the one or more subjects at one or more subsequent Larmor frequencies that are different from the initial Larmor frequency.2. The MRI system of claim 1 , wherein at least one of the initial Larmor frequency and the subsequent Larmor frequencies correspond to hydrogen atoms claim 1 , carbon atoms claim 1 , sodium atoms claim 1 , fluorine atoms claim 1 , helium atoms claim 1 , or xenon atoms.3. The MRI system of claim 1 , whereinthe RF coil includes one or more tuning modules that affect the resonant frequency of the RF coil, andthe controller tunes the resonant frequency of the RF coil by adjusting the one or more tuning modules.4. The MRI system of claim 3 , whereinthe RF coil is of a birdcage design having one or more rungs, andthe one or more tuning modules are disposed between the rungs.5. The MRI system of claim 3 , wherein each of the one or more tuning modules includes one or more capacitance blocks each having a MEM switch connected in series with ...

RF COIL ARRAY FOR AN MRI SYSTEM

Methods and systems are provided for radio frequency (RF) coils for magnetic resonance imaging (MRI) systems. In one embodiment, a system comprises: a radio frequency (RF) coil array for a magnetic resonance imaging (MRI) system, including: a flexible shell including an inner layer; and a plurality of flexible RF coils embedded within the inner layer, with each RF coil of the plurality of RF coils including two distributed capacitance wire conductors. In this way, the RF coil array may deform in order to conform to a body of a patient. 1. A radio frequency (RF) coil array assembly for a magnetic resonance imaging (MRI) system , comprising:a flexible shell including an inner layer; anda plurality of flexible RF coils embedded within the inner layer, wherein each RF coil of the plurality of flexible RF coils includes two distributed capacitance wire conductors.2. The RF coil array assembly of claim 1 , wherein the two distributed capacitance wire conductors include a loop portion comprising two wire conductors encapsulated and separated by a dielectric material; and wherein each RF coil of the plurality of flexible RF coils further includes:a coupling electronics portion including a pre-amplifier; anda coil-interfacing cable extending between the coupling electronics portion and an interfacing connector of the RF coil array.3. The RF coil array assembly of claim 2 , wherein the coupling electronics of each RF coil further includes a decoupling circuit configured to decouple the respective RF coil during a transmit operation of the MRI system.4. The RF coil array assembly of claim 1 , further comprising a sealed outer chamber that is fluidly coupled to a gas source via a valve of the flexible shell.5. The RF coil array assembly of claim 4 , further comprising a loose fill disposed within the outer chamber claim 4 , the loose fill including a plurality of particles movable relative to each other within the outer chamber.6. The RF coil array assembly of claim 4 , wherein ...

FLEXIBLE RADIO FREQUENCY COIL ARRAY WITH DETACHABLE STRAPS FOR MR IMAGING

Methods and systems are provided for radio frequency (RF) coil arrays for magnetic resonance imaging (MRI) systems. In an embodiment, a RF coil array assembly for a MRI system includes a compressible body; an upper posterior RF coil array including a first plurality of RF coils embedded in the compressible body; a lower posterior RF coil array including a second plurality of RF coils embedded in the compressible body; and a head and neck RF coil array removably coupled to the upper posterior RF coil array. The head and neck RF coil array includes a third plurality of RF coils embedded in the compressible body, and one or more neck straps configured to fold over a neck of a subject to be imaged by the MRI system. 1. A radio frequency (RF) coil array assembly for a magnetic resonance imaging (MRI) system , comprising:a compressible body;an upper posterior RF coil array comprising a first plurality of RF coils embedded in the compressible body;a lower posterior RF coil array comprising a second plurality of RF coils embedded in the compressible body; anda head and neck RF coil array removably coupled to the upper posterior RF coil array, the head and neck RF coil array comprising:a third plurality of RF coils embedded in the compressible body; andone or more neck straps configured to fold over a neck of a subject to be imaged by the MRI system;wherein each RF coil of the first plurality of RF coils, the second plurality of RF coils, and the third plurality of RF coils includes a distributed capacitance loop portion comprising two distributed capacitance wire conductors.2. The RF coil array assembly of claim 1 , wherein the upper posterior RF coil array is configured to cover an upper torso of the subject to be imaged by the MRI system and the lower posterior RF coil array is configured to cover a lower torso of the subject.3. The RF coil array assembly of claim 1 , wherein the head and neck RF coil array is molded to conform to a back of a head and neck of the subject ...

SYSTEMS AND METHODS FOR A NECK RADIO FREQUENCY COIL FOR MR IMAGING

Various systems are provided for neck radio frequency (RF) coil assemblies for a magnetic resonance imaging (MM) system. In one example, a neck RF coil assembly includes a central RF coil array including a first plurality of RF coils configured to cover a neck of a subject to be imaged, an upper RF coil array including a second plurality of RF coils extending upward from the central RF coil array and configured to cover a lower head region of the subject, and a lower RF coil array including a third plurality of RF coils extending downward from the central RF coil array and configured to cover an upper shoulder region of the subject, wherein each RF coil of the first, second, and third pluralities of RF coils comprises a loop portion comprising two distributed capacitance wire conductors encapsulated and separated by a dielectric material. 1. A radio frequency (RF) coil assembly for a magnetic resonance imaging (MRI) system , comprising:a central RF coil array including a first plurality of RF coils configured to cover a neck of a subject to be imaged;an upper RF coil array including a second plurality of RF coils extending upward from the central RF coil array and configured to cover a lower head region of the subject; anda lower RF coil array including a third plurality of RF coils extending downward from the central RF coil array and configured to cover an upper shoulder region of the subject,wherein each RF coil of the first, second, and third pluralities of RF coils comprises a loop portion comprising two distributed capacitance wire conductors encapsulated and separated by a dielectric material.2. The RF coil assembly of claim 1 , wherein each RF coil further comprises a coupling electronics portion for connecting to a data acquisition unit of the MRI system.3. The RF coil assembly of claim 1 , wherein:the first plurality of RF coils are distributed along a central longitudinal axis of a substrate section;each RF coil of the second plurality of RF coils is ...

Systems and methods for toroidal twinax cable trap

Various methods and systems are provided for a flexible, lightweight, and low-cost radio frequency (RF) trap for use in a magnetic resonance imaging (MRI) system. In one example, a radio frequency (RF) trap assembly for use in a magnetic resonance imaging (MRI) system is provided, comprising a twinax wire assembly having a plurality of looped portions, each ones of the plurality of looped portions tangentially in contact with a shielded cable, and at least one support structure for substantially maintaining the shape of the plurality of looped portions, the support structure surrounding a portion of the shielded cable, wherein the twinax wire assembly is tuned to a frequency suitable for increasing the impedance of the shielded cable.

SYSTEMS AND METHODS FOR AN ABDOMINAL RADIO FREQUENCY COIL FOR MR IMAGING

Various systems and methods are provided for radio frequency coil assemblies for a magnetic resonance imaging system. In one example, a method comprises: flowing air through a plurality of airflow passages formed in a radio frequency (RF) coil assembly for a magnetic resonance imaging (MRI) system; and receiving magnetic resonance (MR) signals from an RF coil array of the RF coil assembly, wherein the RF coil array comprises a plurality of RF coil elements, each RF coil element having a loop portion which comprises two distributed capacitance wire conductors encapsulated and separated by a dielectric material. 1. A method , comprising:flowing air through a plurality of airflow passages formed in a radio frequency (RF) coil assembly for a magnetic resonance imaging (MRI) system; andreceiving magnetic resonance (MR) signals from an RF coil array of the RF coil assembly, wherein the RF coil array comprises a plurality of RF coil elements, each RF coil element having a loop portion which comprises two distributed capacitance wire conductors encapsulated and separated by a dielectric material.2. The method of claim 1 , wherein the RF coil assembly comprises a support section configured to support a subject to be imaged and a foldable section configured to wrap around an abdominal region of the subject claim 1 , and wherein flowing air through the plurality of airflow passages includes flowing air through a first plurality of airflow passages formed in the support section and a second plurality of passages formed in the foldable section.3. The method of claim 2 , wherein the first airflow passages are fluidly coupled to the second plurality of passages.4. The method of claim 1 , wherein flowing air through the plurality of airflow passages includes increasing a temperature of the air to increase a temperature of the RF coil assembly or decreasing the temperature of the air to decrease the temperature of the RF coil assembly.5. The method of claim 4 , wherein increasing a ...

SYSTEMS FOR A RADIO FREQUENCY COIL FOR MR IMAGING

Various methods and systems are provided for a flexible, lightweight, and low-cost radio frequency (RF) coil of a magnetic resonance imaging (MRI) system. In one example, a RF coil assembly for an MRI system includes a distributed capacitance loop portion comprising two parallel conductor wires encapsulated and separated by a dielectric material, the two parallel conductor wires maintained separate by the dielectric material along an entire length of the loop portion between terminating ends thereof, a coupling electronics portion including a pre-amplifier, and a coil-interfacing cable extending between the coupling electronics portion and an interfacing connector of the RF coil assembly. 1. A radio frequency (RF) coil assembly for a magnetic resonance imaging (MRI) system , comprising:a distributed capacitance loop portion comprising two parallel conductor wires encapsulated and separated by a dielectric material, the two parallel conductor wires maintained separate by the dielectric material along an entire length of the loop portion between terminating ends thereof;a coupling electronics portion including a pre-amplifier; anda coil-interfacing cable extending between the coupling electronics portion and an interfacing connector of the RF coil assembly.2. The RF coil assembly of claim 1 , wherein the coupling electronics portion further includes a decoupling circuit and an impedance inverter circuit.3. The RF coil assembly of claim 2 , wherein the impedance inverter circuit comprises an impedance matching network and an input balun.4. The RF coil assembly of claim 3 , wherein the pre-amplifier comprises a low input impedance pre-amplifier optimized for high source impedance claim 3 , and wherein the impedance matching network provides the high source impedance.5. The RF coil assembly of claim 1 , wherein a capacitance of the loop portion is a function of a spacing between the two parallel conductor wires claim 1 , a position and/or number of cuts on the two ...

SYSTEMS AND METHODS FOR A CONFIGURABLE RADIO FREQUENCY COIL FOR MR IMAGING

Various systems are provided for magnetic resonance imaging (MRI). In one example, a method includes selecting a contour topology for operating a configurable radio frequency (RF) coil assembly, wherein the configurable RF coil assembly includes an array of conductive segments coupled via a plurality of switches, and the contour topology defines a configuration of one or more RF coil elements formed on the configurable RF coil assembly. The method further includes, during a receive mode, at least partially activating one or more subsets of switches of the plurality of switches according to the selected contour topology to form the one or more RF coil elements. 1. A method for magnetic resonance imaging (MRI) , the method comprising:selecting a contour topology for operating a configurable radio frequency (RF) coil assembly, wherein the configurable RF coil assembly includes an array of conductive segments coupled via a plurality of switches, and the contour topology defines a configuration of one or more RF coil elements formed on the configurable RF coil assembly; andduring a receive mode, at least partially activating one or more subsets of switches of the plurality of switches according to the selected contour topology to form the one or more RF coil elements.2. The method of claim 1 , wherein at least partially activating the one or more subsets of switches includes coupling at least two terminals of each switch of the one or more subsets of switches to electrically couple one or more subsets of the conductive segments claim 1 , wherein each RF coil element is formed from a respective subset of conductive segments and a respective subset of switches.3. The method of claim 1 , wherein selecting the contour topology comprises claim 1 , during a first MRI scan claim 1 , selecting a first contour topology and during a second MRI scan claim 1 , selecting a second contour topology different than the first contour topology.4. The method of claim 3 , wherein the first ...

Systems and methods for common mode traps in mri systems

Various methods and systems are provided for a common mode trap for a magnetic resonance imaging (MRI) apparatus. In one embodiment, a common mode trap for an MRI apparatus comprises: a first conductor and a second conductor counterwound around a length of a central conductor, wherein the first and the second conductors are radially spaced a first distance from the central conductor at first and second ends of the length, and wherein the first and the second conductors are radially spaced a second distance larger than the first distance from the central conductor at a midpoint of the length. In this way, coupling and subsequent detuning of common mode traps provided adjacent to one another may be prevented.

Systems and methods for common mode traps in mri systems

Various methods and systems are provided for a common mode trap for a magnetic resonance imaging (MRI) apparatus. In one embodiment, a common mode trap comprises: a first conductor and a second conductor counterwound around a length of a central conductor, the first and the second conductors radially spaced a distance from the central conductor, the first and second conductors fixed to a first side of the central conductor; and a third conductor and a fourth conductor counterwound around the length of the central conductor, the third and fourth conductors are radially spaced the distance from the central conductor, the third and fourth conductors fixed to a second side of the central conductor opposite the first side. In this way, the density of common mode trap conductors in a common mode trap may be increased, thereby increasing the mutual inductance between the common mode trap and the central conductor.

Systems for a radio frequency coil for mr imaging

Various methods and systems are provided for a flexible, lightweight, and lowcost radio frequency (RF) coil of a magnetic resonance imaging (MRI) system. In one example, a RF coil assembly for an MRI system includes a distributed capacitance loop portion comprising at least three distributed capacitance conductor wires encapsulated and separated by a dielectric material, a coupling electronics portion including a preamplifier, and a coil-interfacing cable extending between the coupling electronics portion and an interfacing connector of the RF coil assembly.

METHOD AND SYSTEMS FOR A RADIO FREQUENCY COIL ASSEMBLY

Various methods and systems are provided for radio frequency (RF) coils for magnetic resonance imaging (MRI). In one embodiment, an RF coil assembly for an MRI system includes a posterior end including a first set of flexible RF coils; an anterior end including a second set of flexible RF coils; a central section extending between the posterior end and anterior end, wherein the posterior end and the anterior end are bendable to the central section. Each flexible RF coil of the first set and second set of flexible RF coils includes a loop portion comprising a coupling electronics portion and at least two parallel, distributed capacitance wire conductors encapsulated and separated by a dielectric material. 1. A radio frequency (RF) coil assembly for a magnetic resonance imaging (MRI) system , comprising:a posterior end including a first set of flexible RF coils;an anterior end including a second set of flexible RF coils;a central section extending between the posterior end and anterior end, wherein the posterior end and the anterior end are bendable to the central section; andwhere each flexible RF coil of the first set and second set of flexible RF coils includes a loop portion comprising a coupling electronics portion and at least two parallel, distributed capacitance wire conductors encapsulated and separated by a dielectric material.2. The RF coil assembly of claim 1 , wherein the first set of flexible RF coils includes nine flexible RF coils.3. The RF coil assembly of claim 2 , wherein the nine flexible RF coils of the first set of flexible RF coils are arranged in three rows claim 2 , with a first row of the three rows including four flexible RF coils claim 2 , with a second row of the three rows including three flexible RF coils claim 2 , and with a third row of the three rows including two flexible RF coils.4. The RF coil assembly of claim 3 , wherein the second row overlaps each of the first row and the third row claim 3 , with the first row positioned closer ...

METHOD AND SYSTEMS FOR A RADIO FREQUENCY COIL ASSEMBLY

Various methods and systems are provided for radio frequency (RF) coils for magnetic resonance imaging (MRI). In one embodiment, a radio frequency coil assembly for a magnetic resonance imaging system includes: a flexible spine; and at least two RF coil sections each coupled to the flexible spine and movable relative to each other, each RF coil section comprising at least one flexible RF coil, each RF coil including a loop portion comprising a coupling electronics portion and at least two parallel, distributed capacitance wire conductors encapsulated and separated by a dielectric material.

SYSTEMS FOR A RADIO FREQUENCY COIL ASSEMBLY

Various methods and systems are provided for radio frequency (RF) coils for magnetic resonance imaging (MRI). In one embodiment, an RF coil assembly for an MRI system includes a first end including a first set of flexible RF coil elements having a first shape, a second end including a second set of flexible RF coil elements having the first shape, and a central section extending between the first end and the second end and including a saddle shaped RF coil element. The first and second ends are bendable to the central section and the saddle shaped RF coil element is a different shape than the first shape. The saddle shaped RF coil element and each RF coil element of the first and second sets of RF coil elements includes a coupling electronics portion and at least two parallel, distributed capacitance wire conductors encapsulated and separated by a dielectric material. 1. A radio frequency (RF) coil assembly for a magnetic resonance imaging (MRI) system , comprising:a first end including a first set of flexible RF coil elements having a first shape;a second end including a second set of flexible RF coil elements having the first shape;a central section extending between the first end and the second end and including a flexible, saddle shaped RF coil element, the first end and the second end bendable to the central section, the saddle shaped RF coil element having a different shape than the first shape; andwhere the saddle shaped RF coil element and each RF coil element of the first set of RF coil elements and the second set of RF coil elements includes a coupling electronics portion and at least two parallel, distributed capacitance wire conductors encapsulated and separated by a dielectric material.2. The RF coil assembly of claim 1 , wherein the first shape is circular and wherein the saddle shaped RF coil element is a twisted loop.3. The RF coil assembly of claim 2 , wherein the RF coil assembly has an axis of symmetry at a central transverse axis that bisects the ...

Open peripheral vascular coil and method of providing peripheral vascular imaging

An open peripheral vascular coil and method of providing peripheral vascular imaging are provided. The peripheral vascular coil includes a base coil section having a plurality of coil elements and a plurality of coil sections configured for removable attachment to the base coil section. Each of the plurality of coil sections includes a plurality of coil elements.

System and method for parallel transmission in MR imaging

A system and method for selectively operating an array of RF receive coils in a transmit mode is disclosed. The system includes an RF transmit coil configured to generate an RF field that excites nuclei of a subject to generate RF resonance signals, an array of RF receive coils to receive the RF resonance signals, and a detuning circuit coupled to each RF receive coil in the array of RF receive coils that is selectively switched between a disabled and an enabled state to control a resonance and impedance of the RF receive coil. Each RF receive coil is caused to receive RF resonance signals when its respective detuning circuit is in the disabled state and is caused to modify an amplitude and phase of the RF field generated by the RF transmit coil when its respective detuning circuit is in the enabled state.

System and method for parallel transmission in mr imaging

A system and method for selectively operating an array of RF receive coils in a transmit mode is disclosed. The system includes an RF transmit coil configured to generate an RF field that excites nuclei of a subject to generate RF resonance signals, an array of RF receive coils to receive the RF resonance signals, and a detuning circuit coupled to each RF receive coil in the array of RF receive coils that is selectively switched between a disabled and an enabled state to control a resonance and impedance of the RF receive coil. Each RF receive coil is caused to receive RF resonance signals when its respective detuning circuit is in the disabled state and is caused to modify an amplitude and phase of the RF field generated by the RF transmit coil when its respective detuning circuit is in the enabled state.

Systems and methods for a neck radio frequency coil for MR imaging

Various systems are provided for neck radio frequency (RF) coil assemblies for a magnetic resonance imaging (MRI) system. In one example, a neck RF coil assembly includes a central RF coil array including a first plurality of RF coils configured to cover a neck of a subject to be imaged, an upper RF coil array including a second plurality of RF coils extending upward from the central RF coil array and configured to cover a lower head region of the subject, and a lower RF coil array including a third plurality of RF coils extending downward from the central RF coil array and configured to cover an upper shoulder region of the subject, wherein each RF coil of the first, second, and third pluralities of RF coils comprises a loop portion comprising two distributed capacitance wire conductors encapsulated and separated by a dielectric material.

Inductor assembly for a magnetic resonance imaging system

An inductor assembly includes an electrical conductor having a first end and an opposite second end, and a plurality of turns, each turn having a first lobe and a second lobe, the electrical conductor being formed into a lemniscate shape. A Radio Frequency (RF) coil including the lemniscate shaped inductor and a Magnetic Resonance Imaging (MRI) system including the lemniscate shaped inductor are also described herein.

Invisible balun and method of making same

An apparatus and method for reducing stray magnetic fields include a decoupling circuit includes a balun that comprises a transmission line. The transmission line includes a first spiral positioned substantially parallel to a first plane, the first spiral emanating from a inner portion of the first spiral in a first spiral direction. The transmission line also includes a second spiral positioned substantially parallel to the first plane, the second spiral emanating from a inner portion of the second spiral in the first spiral direction, wherein the inner portion of the first spiral is electrically coupled to the inner portion of the second spiral, and wherein the transmission line comprises a signal line and a ground line. The balun further comprises a first capacitor electrically coupled to the transmission line.

RF coil array for an MRI system

Methods and systems are provided for radio frequency (RF) coils for magnetic resonance imaging (MRI) systems. In one embodiment, a system comprises: a radio frequency (RF) coil array for a magnetic resonance imaging (MRI) system, including: a flexible shell including an inner layer; and a plurality of flexible RF coils embedded within the inner layer, with each RF coil of the plurality of RF coils including two distributed capacitance wire conductors. In this way, the RF coil array may deform in order to conform to a body of a patient.

Quadrature and linear rf coil array for mri of human spine and torso

A radio frequency (RF) coil array includes a plurality of RF coil sections arranged in a superior-inferior direction. Each RF coil section includes a first linear coil element, a loop-saddle coil quadrature pair and a second linear coil element configured in an overlapping arrangement in a left-right direction. The position of the first linear coil element and the second linear coil element on the left and right may be shifted in the superior-inferior direction with respect to the center loop-saddle coil quadrature pair.

Electron spin resonance imaging scanner

An electron paramagnetic resonance imaging (EPRI) system includes a resistive magnet driven by a power supply such as a power supply module to generate radio frequency signals in a substantially coherent polyphase perfect sequence scheme. The EPRI system further includes image acquisition and processing electronics configured to generate, acquire, quantify and map pO2 information associated with a free radical agent in vivo and having a resonance line width that is sensitive to oxygen and in response to the radio frequency signals without imparting harmful heating effects to a corresponding human or animal body.

Wireless coil adaptor for a magnetic resonance imaging system

A wireless coil adaptor includes a first plug connector configured to be inserted within a receptacle connector of an MRI system, the receptacle connector being configured for receiving a second plug connector of a wired radio frequency (RF) coil. The wireless coil adaptor also includes a wireless communication module configured to wirelessly communicate with a wireless RF coil.

Radio-frequency traps and methods of common-mode energy damping.

Radio-frequency (RF) traps and methods of common-mode energy damping are provided. One RF trap includes a body and a shutter holder rotatably coupled within the body, wherein the shutter holder is configured to rotate within the body about a longitudinal axis. The RF trap further including a magnetic flux shutter coupled to the shutter holder, wherein the magnetic flux shutter rotates within the body with the shutter holder to align the magnetic flux shutter at an angle within the body.

Radio frequency receiving coil assembly with handle

A radio frequency (RF) receiving coil assembly for a magnetic resonance imaging (MRI) system includes a flexible enclosure. The RF receiving coil assembly also includes an RF coil disposed within the flexible enclosure, wherein the RF coil comprises a plurality of flexible loops having a malleable conductor. The RF receiving coil assembly further includes at least one cutout in the flexible enclosure located outside an area where the RF coil is disposed within the flexible enclosure. The at least one cutout is configured to provide a handle for handling the RF receiving coil assembly.

Systems for a radio frequency coil for mr imaging

Various methods and systems are provided for a flexible, lightweight, and lowcost radio frequency (RF) coil of a magnetic resonance imaging (MRI) system. In one example, a RF coil assembly for an MRI system includes a distributed capacitance loop portion comprising at least three distributed capacitance conductor wires encapsulated and separated by a dielectric material, a coupling electronics portion including a preamplifier, and a coil-interfacing cable extending between the coupling electronics portion and an interfacing connector of the RF coil assembly.

Rf receiver coil with equal perimeter loops

An RF receiving coil assembly for a magnetic resonance imaging system includes a flexible enclosure. The RF coil assembly also includes an RF coil enclosed within the flexible enclosure. The RF coil includes a plurality of loops, each loop of the plurality of loops having a same perimeter.

System and method for stabilizing surface coil

A preamplifier arrangement for an MRI system includes a preamplifier coupled to a loop of a multi-channel coil array of the MRI system, wherein the preamplifier and the loop are subject to potentially form an unstable system with oscillation at one or more peak frequencies. The preamplifier arrangement also includes an impedance matching network disposed between and coupled to the preamplifier and the loop. The impedance matching network is configured to generate a high blocking impedance. The preamplifier arrangement further includes an input network disposed between and coupled to the preamplifier and the loop. The input network is configured to provide an input to suppress gain at the one or more peak frequencies.

Adjustable multistage coil for functional imaging of limb

A radio frequency (RF) multistage receiving coil assembly for a magnetic resonance imaging (MRI) system is provided. The RF multistage receiving coil assembly includes a plurality of RF coils, wherein each RF coil of the plurality of RF coils includes a plurality of flexible loops having a malleable conductor. The RF multistage receiving coil also includes a plurality of flexible enclosures, wherein a respective RF coil of the plurality of RF coils is disposed within a respective flexible enclosure of the plurality of flexible enclosures. The RF multistage receiving coil assembly is configured to be adjusted and disposed about an extremity of a subject to enable functional imaging of the extremity with the MRI system.

Radio-frequency traps and methods of common-mode energy damping.

磁気共鳴画像診断のための調節可能なヘッドコイルシステムおよび方法

【課題】頭部を含む解剖学的構造の磁気共鳴画像診断のためのシステムを提供する。 【解決手段】システムは、ベース部材と、複数の支持部材と、複数の関節運動可能な受入れユニットとを含む。複数の支持部材は、ベース部材に移動可能に固着され、ベース部材の表面を横切って並進するように構成される。各支持部材は、ベース部材の表面に沿った複数の位置でベース部材に解放可能に固定することができる。関節運動可能な受入れユニットは、開位置から複数の閉位置へと移動可能である。各受入れユニットは、頭部の一部分と当接するように構成された本体内に配設された、少なくとも１つの無線周波数（ＲＦ）受信コイルを備える。複数の関節運動可能な受入れユニットはそれぞれ、複数の支持部材の少なくとも１つによって複数の閉位置で解放可能に固定される。 【選択図】図１

Flexible in bore receiving coil array for a magnetic resonance imaging system

An MRI system includes an MRI scanner having a bore and a table configured to move a subject to be imaged into and out of the bore. The MRI system includes a flexible RF receiving coil array integrated within the bore and electronically coupled directly to the MRI scanner, wherein the flexible RF receiving coil array remains in the bore regardless of a position of the table, and the flexible RF receiving coil array is located underneath the table when the table is located within the bore. The MRI system includes an automated mechanism configured to automatically move the flexible RF receiving coil array from underneath the table on a first side of the subject, to pull the flexible RF receiving coil array over the subject from the first side to a second side of the subject, and to fasten the flexible RF receiving coil on the second side.

Split toroid configuration for a current cable trap

A current cable trap includes a first body half having a first end and a second end and a second body half having a third end and a fourth end. The first body half and the second body half are configured to be snapped together about a cable to form a toroid body. The current cable trap includes a first wire and a second wire wrapped around the first body half and the second body half, respectively. The current cable trap includes a first printed circuit board and a second printed board disposed within a first receptacle and a second receptacle, respectively, when the first body half and the second body half are snapped together. The first printed circuit board and the second printed circuit board each provide electrical connection points with wire ends of both the first wire and the second wire.

Wireless coil adaptor for a magnetic resonance imaging system

A wireless coil adaptor includes a first plug connector configured to be inserted within a receptacle connector of an MRI system, the receptacle connector being configured for receiving a second plug connector of a wired radio frequency (RF) coil. The wireless coil adaptor also includes a wireless communication module configured to wirelessly communicate with a wireless RF coil.

Systems, assemblies, and methods of fabrication of radio-frequency coil assemblies of a magnetic resonance system

A method of fabricating a stretchable RF coil assembly of an MR system using a sewing machine is provided. The method includes providing a sewing accessory assembly. The sewing accessory assembly includes a substrate holder including an inner hoop and an outer hoop. The method also includes assembling a former and a stretchable substrate with the substrate holder by coupling sides of the former and sides of the stretchable substrate between the inner hoop and the outer hoop. The method further includes coupling the assembled substrate holder with a sewing machine, and assembling an RF coil assembly by sewing a pattern of a fiber conductor on the stretchable substrate.

Adjustable MRI head coil apparatus and MRI system

An adjustable MRI head coil apparatus and MRI system include a fixture and a plurality of plates attached to the fixture. Each of the plurality of plates includes a plurality of RF receive elements arranged in a fixed orientation. The adjustable MRI head coil apparatus and MRI system also include an actuator mechanism configured to adjust the relative position of each of the plurality of plates in order to fit a variety of different patient head sizes.