Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.