Abstract: A magnetic resonance tomography system includes a computer configured to implement signal processing of transmit signals and/or receive signals. The signal processing is configured to implement a mixer, an upsampler, a decimator, a filter, or any combination thereof.

Abstract: In a method for manufacturing a flat insulation layer for use in a gradient coil, a thermoplastic insulating material in the form of a plate, strip or foil is three-dimensionally deformed in a hot shaping step to form specified local elevations on at least one side, which are spaced apart from one another.

Abstract: In one embodiment, an MRI apparatus includes a wireless RF coil; a control side oscillator configured to output a control-side clock signal used for executing a pulse sequence; and a synchronization signal transmission circuit configured to wirelessly transmit a synchronization signal to the wireless RF coil in an executing period of the pulse sequence, except an MR-signal detection period during which the wireless RF coil detects a magnetic resonance signal, wherein the synchronization signal is within a frequency band of a Larmor frequency and reflects a phase of the control-side clock signal.

Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes a gradient coil, power supply circuitry, and control circuitry. The gradient coil generates a gradient magnetic field. The power supply circuitry supply power to the gradient coil, the power being required by the gradient. The control circuitry temporarily change an upper limit value of power to be supplied by the power supply circuitry to a second value higher than a first value as a rated value based on the power required by the gradient coil.

Abstract: 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.

Abstract: A mobile measuring apparatus for nondestructively determining a material measurement value that relates to a material property of a workpiece comprises a housing in which at least a first sensor device and a second sensor device are located, a control device, an evaluating device, and a device for the supply of energy to the measuring apparatus. The first sensor device has a nuclear magnetic resonance sensor and the second sensor device has a sensor based on dielectric and/or resistive methods. Information about the material property of the workpiece, in particular moisture present in the workpiece, is obtained by evaluating a measurement signal provided by the first sensor device, which information is intended for the optimized control of the second sensor device and/or optimized evaluation of measurement signals provided by the second sensor device.

Abstract: Example apparatus and magnetic resonance imaging (MRI) radio frequency (RF) coils concern controlling current magnitude at different sections in one MRI RF coil. In one embodiment, an MRI RF coil comprises a plurality of loop coils configured to transmit or receive an RF signal. A member of the plurality of loop coils comprises an inductor and at least one capacitor. The MRI RF coil further comprises at least one coaxial transmission line that electrically couple in series a first member of the plurality of loop coils with a second, different member of the plurality of loop coils. The at least one coaxial transmission line has a length that is one-quarter wavelength (?/4) of the RF signal, or an odd integer multiple of ?/4 of the RF signal.

Abstract: In accordance with an embodiment a device is usable to measure radio frequency (RF) signals including microwave signals to provide an alarm when a power level at its input exceeds predetermined levels. A user can attach the device to a coax cable on a microwave or wireless tower to determine if certain power levels are present and what levels are exceeded. If high power is indicated by the device, the user will then avoid attaching that coax cable to other measurement equipment which would be damaged by excessive RF power. The device is further usable, for example, to apply power to one coax cable in a cable bundle then identify which cable of the bundle is getting the power by connecting the device on the output end of each coax in the bundle, one by one.

Abstract: An imaging system includes determination of a first range of values of an imaging parameter, determination of a cost function expressing a difference between a first pulse profile and a second pulse profile, the second pulse profile generated based on respective values of each of a set of pulse parameters, identification of first coefficient values of each function of a set of functions which substantially minimize the cost function over the first range of values of the imaging parameter, where each of the set of functions determines a value of a respective one of the set of pulse parameters based on a value of the imaging parameter, and storage of the first coefficient values of each function of the set of functions in association with the first range of values.

Abstract: A radiofrequency (RF) coil for use in a magnetic resonance imaging (MRI) system using a plurality of RF coils includes a main loop coil including a plurality of electrical conductors, and an auxiliary loop coil disposed around the plurality of electrical conductors and including a plurality of electrical conductors.

Abstract: A system and method synchronizes a digitizer clock of a Magnetic Resonance Imaging (MRI) device with a system clock of an imaging device. In a first method, an original reference signal is split into first and second reference signals in which the second reference signal is phase shifted to generate an orthogonal reference signal. A reliability of image data may be determined based upon a product between the first reference signal and the orthogonal reference signal. In a second method, a reference signal is transmitted from the imaging device to the MRI device and a return signal is received from the MRI device to the imaging device. A discrepancy between the digitizer clock and the system clock may be determined based upon the return signal which includes a variable time delay.

Abstract: An apparatus to provide power for operating at least one gradient coil of a magnetic resonance imaging system. According to some aspects, the apparatus comprises a plurality of power terminals configured to supply different voltages of a first polarity, and a linear amplifier configured to provide at least one output to power the at least one gradient coil to produce a magnetic field in accordance with a pulse sequence, the linear amplifier configured to be powered by one or more of the plurality of power terminals, wherein the one or more of the plurality of power terminals powering the linear amplifier is selected based, at least in part, on the at least one output.

Abstract: A system includes a transmitter having a first transmit device having a first transmit antenna and a first OAM multiplexer designed to receive two input signals and to convert the input signals to orthogonal OAM beams. The first transmit antenna is designed to transmit a first output signal that includes the OAM beams. The transmitter also includes a second transmit device that functions in a similar manner as the first transmit device. A receiver includes a first receive device having a first receive antenna designed to receive the first output signal and a first OAM demultiplexer designed to convert the first output signal to received signals corresponding to the input signals. The receiver also includes a second receive device having similar features as the first receive device. The receiver also includes a MIMO processor designed to reduce interference between the received signals.

Abstract: A magnetic resonance imaging apparatus according to one embodiment includes an arranger, a sensitivity deriver, and an image generator. The arranger arranges time-series data at a part of sampling points out of sampling points of a k-space determined based on an imaging parameter. The sensitivity deriver derives a sensitivity distribution in a time-space, in which the time-series data transformed in a time direction is expressed with a coefficient value, based on the time-series data. The image generator generates an image of the time-series data using the time-series data and the sensitivity distribution.

Abstract: A magnetic resonance apparatus has a scanner with a superconducting basic field magnet, a gradient coil unit, and a radio-frequency antenna unit, an electronics unit, and a cooling apparatus. The cooling apparatus has a cryostat for cooling the superconducting basic field magnet and a first cooling circuit for cooling the electronics unit and/or the gradient coil unit and/or the radio-frequency antenna unit, and a second cooling circuit for cooling the cryostat.

Abstract: A sensing system for monitoring an industrial fluid is presented. The sensing system includes a housing and a sensor probe disposed at least partially in the housing, where the sensor probe includes a substrate, a sensing region disposed on the substrate, a first coil disposed on the substrate and coupled to the sensing region, and a second coil disposed on the substrate and coupled to the first coil. A method for operating the sensing system is also presented.

Abstract: A magnetic field monitoring probe includes a first container having a sample configured to emit a magnetic resonance (MR) signal included therein; a radio frequency (RF) coil inserted into the first container and configured to receive an MR signal emitted from the sample; and a second container surrounding the first container and having a matching liquid injected thereinto.

Abstract: An NMR analysis device, method and probe, including a frame, a sample-holder (12) comprising a rotor (31), suitable for receiving a sample of material (15) to be analyzed, a bearing (13) for rotationally guiding the sample-holder (12) relative to the frame, a turbine (14) kinematically linked with the rotor, the turbine having a geometry such that it allows an isentropic expansion of a third fluid (M3) which passes through it, and a fourth element for channeling (24, 23) a fourth gaseous flow (M4) of fluid downstream of the expansion turbine (14) or for channeling a sixth gaseous flow (M6) of fluid downstream of the rotor (31) and stator (30) of the sample-holder (12).

Abstract: A magnetic resonance imaging system configured for generating a three-dimensional representation of at least one breast of a patient includes: a device configured for generating a homogeneous magnetic field; a system of active gradient coils configured for generating at least one magnetic field gradient within a measurement volume; at least one breast holder having an internal space configured for positioning the at least one breast during an MRI scan within the measurement volume; at least one local coil system that includes at least one individual coil, the at least one individual coil configured to act as an antenna for receiving magnetic resonance signals; and at least one cushion configured for stabilizing the at least one breast by filling the internal space between the at least one breast and an external boundary of the internal space.

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

Abstract: Embodiments of the present disclosure disclose a radio remote unit, a receiver, and a base station. The radio remote unit includes at least one receive channel pair, a first local oscillator module, a second local oscillator module, a local oscillator switching switch, and a controller. Each receive channel pair includes a first receive channel and a second receive channel. Each receive channel in each receive channel pair includes a filtering module, a frequency mixing module connected to the filtering module, and a digital processing module connected to the frequency mixing module. A frequency mixing module on the second receive channel is connected to the first local oscillator module and the second local oscillator module by the local oscillator switching switch. The controller is configured to receive an operating mode that is sent by a base station, and control the local oscillator switching switch to perform switching.

Abstract: Systems, methods and devices are configured for integrated parallel reception, excitation, and shimming (iPRES) with RF coil elements with split DC loops. Parallel transmit/receive (which can include B1 shimming and/or parallel imaging capabilities) and B0 shimming employ the same set of localized coils or transverse electromagnetic (TEM) coil elements, with each coil or TEM element working in both an RF mode (for transmit/receive and B1 shimming) and a direct current (DC) mode (for B0 shimming) simultaneously. Both an RF and a DC current (in split DC loops) can flow in the same coil element simultaneously but independently with no electromagnetic interference between the two modes.

Abstract: Systems, methods and devices are configured for integrated parallel reception, excitation, and shimming (iPRES). Parallel transmit/receive (which can include B1 shimming and/or parallel imaging capabilities) and B0 shimming employ the same set of localized coils or transverse electromagnetic (TEM) coil elements, with each coil or TEM element working in both an RF mode (for transmit/receive and B1 shimming) and a direct current (DC) mode (for B0 shimming) simultaneously. Both an RF and a DC current can flow in the same coil simultaneously but independently with no electromagnetic interference between the two modes. This invention is not only applicable when the same coil array is used for parallel transmit, receive and shim, but also when two separate coil arrays are used. In that case, the B0 shimming capability can be integrated into one of the coil arrays (i.e. a transmit array with B1 shimming capability or a receive array), thereby increasing the flexibility and practical utility of the iPRES technology.

Abstract: A continuous common mode trap assembly includes a central conductor and plural common mode traps. The central conductor has a length, and is configured to transmit a signal between a magnetic resonance imaging (MRI) receive coil and at least one processor of an MRI system. The plural common mode traps extend along at least a portion of the length of the central conductor. The common mode traps are disposed contiguously. The common mode traps are configured to provide an impedance to reduce transmitter driven currents of the MRI system.

Abstract: Apparatuses and a method are provided for transmitting signals in a medical imaging system. The method includes transmitting signals wirelessly between at least one receive facility and a facility of the imaging system via a radio network.

Abstract: A superconducting magnet assembly includes a cryostat, a vacuum vessel and a refrigeration stage. An NMR probe using the assembly includes comprises cooled probe components, a two-stage cryocooler, and a counter flow heat exchanger. A cooling circuit guides coolant from one outlet of the counter flow heat exchanger back to an inlet of the counter flow heat exchanger via the second cooling stage, a cooled probe component, and a heat exchanger in the cryostat or a heat exchanger in a helium suspension tube. Both the intake temperature of the coolant flowing into the heat exchanger in the cryostat or in the suspension tube and the return flow temperature of the emerging coolant are at least 5 K lower than the operating temperature of the first cooling stage. Excess cooling capacity of the cryocooler reduces the evaporation rate of liquid helium or cools a superconducting magnet in a cryogen-free cryostat.

Abstract: An arrangement for carrying out dynamic magnetic field measurements in a MR imaging or MR spectroscopy apparatus comprises at least one magnetic field probe (2) comprising a MR active substance (4), means (8, 10) for pulsed MR excitation of said substance and means (8, 10) for receiving an MR signal generated by said substance. The magnetic field probe further comprises a radio frequency shield (12) against external high-frequency electromagnetic field irradiation substantially surrounding the magnetic field probe. The shield is composed of conductive elements embedded in a dielectric material. The conductive elements are electrically conductive filaments and/or electrically conductive platelets.

Abstract: The embodiments relate to a method and field probes for measuring a static and/or in particular a dynamic magnetic field in an imaging magnetic resonance tomography system, wherein the field probe includes a body surrounded by a coil. The coil includes a middle or center winding section and at least one or two outer winding sections.

Abstract: An MR device has at least one distribution network for distributing an electrical input signal (to a number of feeding points of an MR antenna. The distribution network has at least one first signal output and one second signal output connected to a node, a first phase-shifting element disposed between the node and the first signal output, and a second phase-shifting element disposed between the node and the second signal output. The first phase-shifting element and the second phase-shifting element create a different phase shift, and the first phase-shifting element and the second phase-shifting element are embodied as electrical lines of different length. The distribution network is applicable, for example, to feeding signals to a body coil of the MR device, especially a so-called birdcage antenna.

Abstract: The present invention provides an RF shimming method for a nuclear magnetic resonance imaging apparatus comprising: a transmission coil having a plurality of channels that respectively transmit high frequencies to an object and a calculation unit performing RF shimming calculation that determines at least one of amplitudes and phases of the high frequencies to be transmitted respectively to a plurality of the channels so as to improve homogeneity of a high-frequency magnetic field distribution generated by the transmission coil and reduce a specific absorption ratio of the object. Objective function parameters for setting the objective function are determined according to contribution to the SAR for each of the channels during the RF shimming calculation based on the objective function and the restriction condition.

Abstract: The present invention provides a gradient coil assembly (122) for use in a magnetic resonance imaging system (110) comprising a set of inner coils (142) and a set of outer coils (144), which are concentrically arranged in respect to a common rotational axis of the set of inner and outer coils (142, 144), wherein the set of inner coils (142) and a set of outer coils (144) can be controlled to generate gradient magnetic fields within an inner space of the gradient coil assembly (122), and at least one coil (152, 154, 156) of the set of outer coils (144) is at least partially made of aluminum. The present invention further provides a magnetic resonance (MR) imaging system (110) comprising the above magnetic gradient coil assembly (122).

Abstract: A sample tube is arranged in a sample temperature adjusting pipe, and a temperature adjustment gas is supplied. A vacuum vessel is formed with the sample temperature adjusting pipe and an outer wall body, and a detection coil and the like to be placed in a cooling state are arranged in the vacuum vessel. A sealed section between the sample temperature adjusting pipe and the outer wall body is sealed by a sealing structure. The sealing structure includes a high-vacuum O-ring and a low-temperature O-ring. The high-vacuum O-ring has characteristics for sealing the sealed section in a regular temperature region. The regular temperature region is a temperature region excluding a low temperature region, and the low temperature region is a temperature region including a lower limit in a possible temperature adjustment range of the temperature adjustment gas. The low-temperature O-ring has characteristics for sealing the sealed section in the low temperature region.

Abstract: A flexible printed circuit board structure includes a spiral flexible printed circuit board and a protection cover capable of providing functions of extensibility and retractility. The spiral flexible printed circuit board includes a flexible substrate curling up spirally, a patterned circuit layer and a plurality of electrical contacts. The patterned circuit layer is disposed on the flexible substrate. The electrical contacts are disposed on an end of the flexible substrate and electrically connected to the patterned circuit layer. The protection cover at least covers a part of the spiral flexible printed circuit board.

Abstract: The invention relates to a method of MR imaging of an object (10) placed in an examination volume of a MR device (1). The method comprises the steps of: —subjecting the object (10) to an imaging sequence comprising phase-modulated multi-slice RF pulses for simultaneously exciting two or more spatially separate image slices, —acquiring MR signals, wherein the MR signals are received in parallel via a set of at least two RF coils (11, 12, 13) having different spatial sensitivity profiles within the examination volume, and —reconstructing a MR image for each image slice from the acquired MR signals, wherein MR signal contributions from the different image slices are separated on the basis of the spatial sensitivity profiles of the at least two RF coils (11, 12, 13) and on the basis of the phase modulation scheme of the RF pulses.

Abstract: A magnetic resonance imaging apparatus includes a static magnetic field magnet and a gradient coil. The static magnetic field magnet generates a static magnetic field. The gradient coil is provided on an inside of the static magnetic field magnet and includes an X coil, a Y coil and a Z coil. The X coil generates a gradient magnetic field along a horizontal axis of a substantially circular cylinder, the horizontal axis being perpendicular to a long axis. The Y coil generates a gradient magnetic field along a vertical axis of the substantially circular cylinder. The Z coil generates a gradient magnetic field along the long axis of the substantially circular cylinder. In the gradient coil, coils are laminated in such a manner that the X coil is positioned more distant from a magnetic field center than the Y coil is.

Abstract: Systems and methods are described herein for provisioning power to a power consumption device in a depowered state (e.g., a device not consuming current such as standby current). Aspects discussed herein relate to controlling a detector, switches, and/or an outlet such as a smart outlet. In some examples, a message may be sent to a powered controller. The controller may be configured to send a signal to activate a detector, which may be sent via a wireless signal and/or via generation of a resonance frequency via a tuned circuit (e.g., via resonant coupling). The signal may include “bootstrap” power that enables the detector to activate a switch to receive power from an additional or alternative power source. The detector may further receive and decode the signal to operate one or more outlets or switches, gates, relays, thyristors, transistors, or so on to provide power to a power-consumption device.

Abstract: An apparatus, a magnetic resonance imaging system, and a method of use are provided for a reception system for transmitting magnetic resonance signals from local coils to an image processing unit of a magnetic resonance imaging system. The apparatus includes an analog receiver for receiving and processing analog signals from the local coils that is configured to directly sample analog signals having different individual frequency bands and/or frequency band pairs, to distinguish the analog signals and to process them differently. The apparatus also includes an A/D converter for converting the processed analog signals from the local coils into digital signals. The apparatus further includes a digital signal processor for processing the digital signals, wherein the digital signal processor includes a Weaver unit and a downstream decimation filter unit.

Abstract: An active position marker system comprising at least one active position marker (10) and a remote transceiver unit (20) for communicating with the position marker is disclosed. Basically, the position marker (10) comprises a local RF receive coil (11) for receiving MR signals which are excited in a local volume, and a parametric amplifier (14) for amplifying and upconverting the frequency of the received MR signal into at least one microwave sideband frequency signal. This microwave signal is transmitted wirelessly or wire-bound to the transceiver unit for downconverting the same and supplying it to an image processing unit of an MR imaging apparatus.

Abstract: A patient couch for a magnetic resonance tomography system and a magnetic resonance tomography system are provided. The patient couch includes a feed facility for radiofrequency energy having a plurality of conduction paths for feeding radiofrequency energy. The patient couch also includes a plurality of plug-in connectors for local coils having a transmit coil, and a distribution structure for the distribution of radiofrequency energy from the feed facility to the plug-in connectors.

Abstract: According to one embodiment, an MRI apparatus includes a first radio communication unit, a second radio communication unit and an image reconstruction unit. The first radio communication unit includes a connecting unit detachably connected to an RF coil device which detects a nuclear magnetic resonance signal emitted from an object. The first radio communication unit acquires the nuclear magnetic resonance signal detected by the RF coil device via the connecting unit, and wirelessly transmits the acquired nuclear magnetic resonance signal. The second radio communication unit receives the nuclear magnetic resonance signal wirelessly transmitted from the first radio communication unit. The image reconstruction unit acquires the nuclear magnetic resonance signal received by the second radio communication unit, and reconstructs image data of the object based on the nuclear magnetic resonance signal.

Abstract: A local coil for an MRI system includes a signal antenna to receive a magnetic resonance signal and a tuning/detuning circuit to subject the signal antenna part to switch control according to a control signal. The tuning/detuning circuit is connected to the signal antenna part. The tuning/detuning circuit includes a control signal interface, a resonant circuit and an AC/DC conversion circuit. The control signal interface receives the control signal. The resonant circuit includes a diode. The AC/DC conversion circuit converts an alternating current generated by an electromagnetic wave to a direct current. The AC/DC conversion circuit is connected in series with the diode. A small detuning control current may be used, and detuning control circuitry may be reduced.

Abstract: In this disclosure, a process of imaging a target object using magnetic resonance (MR) includes an MRI scanner scanning the target object using a first transmit RF pulse. A processor associated with the MRI scanner can acquire magnitude and/or phase data associated with a first RF signal produced (or echoed) by the target object responsive to the MRI scan. The processor can determine a second transmit RF pulse for use to scan the target object based on the acquired data and according to a given phase criterion. The phase criterion can be configured to enforce mitigation of a phase distribution estimated based on the acquired data.

Abstract: A local coil and a magnetic resonance imaging system are provided. The local coil includes an antenna part, an adjustment part and a transmission part. The antenna part includes a first capacitor connected in series for adjusting a frequency of the antenna part. The adjustment part includes a tuning/detuning diode and is connected in parallel to the first capacitor, and the tuning/detuning diode is used for adjusting tuning and detuning of the antenna part. The transmission part includes a radio-frequency transmission line that connects the antenna part and the adjustment part, and the transmission part provides a phase difference of an odd multiple of 180° between the antenna part and the tuning/detuning diode.

Abstract: A biological detector includes a conduit for receiving a fluid containing one or more magnetic nanoparticle-labeled, biological objects to be detected and one or more permanent magnets or electromagnet for establishing a low magnetic field in which the conduit is disposed. A microcoil is disposed proximate the conduit for energization at a frequency that permits detection by NMR spectroscopy of whether the one or more magnetically-labeled biological objects is/are present in the fluid.

Abstract: A transmit antenna selector includes a control circuit, a body coil signal output interface, a local coil signal output interface, a radio-frequency signal input interface, and a dummy load. The control circuit includes a plurality of diodes. The control circuit electrically connects, according to a control signal and via the plurality of diodes, the radio-frequency signal input interface with the body coil signal output interface, with the local coil signal output interface, or with the dummy load.

Abstract: A superconducting magnet assembly includes a cryostat, a vacuum vessel and a refrigeration stage. An NMR probe using the assembly includes comprises cooled probe components, a two-stage cryocooler, and a counter flow heat exchanger. A cooling circuit guides coolant from one outlet of the counter flow heat exchanger back to an inlet of the counter flow heat exchanger via the second cooling stage, a cooled probe component, and a heat exchanger in the cryostat or a heat exchanger in a helium suspension tube. Both the intake temperature of the coolant flowing into the heat exchanger in the cryostat or in the suspension tube and the return flow temperature of the emerging coolant are at least 5 K lower than the operating temperature of the first cooling stage. Excess cooling capacity of the cryocooler reduces the evaporation rate of liquid helium or cools a superconducting magnet in a cryogen-free cryostat.

Abstract: A local coil for a magnetic resonance imaging system for acquisition of magnetic resonance signals includes a receiving mechanism for wireless transmission of operating energy of the local coil and/or a signal of the magnetic resonance imaging system. The receiving mechanism is configured to take the operating energy and/or the signal from a supply field. A magnetic resonance imaging system is also provided. The magnetic resonance imaging system includes a transmitting mechanism for wireless transmission of operating energy of a local coil and/or a signal of the magnetic resonance imaging system. The transmitting mechanism has a transmission signal generator that is connected to a field source and a field sink. The transmitting mechanism is constructed such that, in operation, the operating energy and/or the signal is transmitted by a supply field that is present as an electrical alternating voltage field between the field source and the field sink.

Abstract: A contactless power supply has a dynamically configurable tank circuit powered by an inverter. The contactless power supply is inductively coupled to one or more loads. The inverter is connected to a DC power source. When loads are added or removed from the system, the contactless power supply is capable of modifying the resonant frequency of the tank circuit, the inverter frequency, the inverter duty cycle or the rail voltage of the DC power source.

Abstract: The present invention relates to a power supply system (311) for supplying current to a gradient coil (303) of a magnetic resonance imaging system (100), the power supply system (311) comprising: an electrical power supply (309) to supply a first voltage to a gradient amplifier (307) for driving the gradient coil, the gradient amplifier output being connected to the gradient coil (303); an energy buffer having an input connected to the electrical power supply (309), the energy buffer being configured to supply second voltage to the gradient amplifier (307), the energy buffer being in parallel to the gradient amplifier (307) and the electrical power supply (309), the energy buffer comprising a voltage converter (313) configured to control the second voltage as to compensate for a variation in the first voltage resulting from the driving of the gradient coil (303).

Abstract: Systems, methods and devices are configured for integrated parallel reception, excitation, and shimming (iPRES) with RF coil elements with split DC loops. Parallel transmit/receive (which can include B1 shimming and/or parallel imaging capabilities) and B0 shimming employ the same set of localized coils or transverse electromagnetic (TEM) coil elements, with each coil or TEM element working in both an RF mode (for transmit/receive and B1 shimming) and a direct current (DC) mode (for B0 shimming) simultaneously. Both an RF and a DC current (in split DC loops) can flow in the same coil element simultaneously but independently with no electromagnetic interference between the two modes.