Abstract: In one embodiment, a magnetic resonance imaging apparatus includes: a scanner that includes a static magnetic field magnet configured to generate a static magnetic field, a gradient coil configured to generate a gradient magnetic field, and a WB (Whole Body) coil configured to apply an RF pulse to an object; and processing circuitry. The processing circuitry is configured to: set (i) a pulse sequence in which a sequence element is repeated, the sequence element including at least an inversion pulse and (ii) a data acquisition sequence executed after a delay time from the inversion pulse; and cause the scanner to execute the pulse sequence by using virtual gating.

Abstract: An example multi-channel magnetic resonance (MR) system is described. The system includes a plurality of radio frequency (RF) coils and a plurality of spectrometer transceiver channels. Each of the channels including a spectrometer coupled a respective set of the RF coils. The spectrometer is configured to transmit RF signals to excite respective RF coils and to receive MR sensor signals from the excited respective RF coils responsive to excitation thereof. The spectrometer is configured to perform MR spectrometry to provide MR measurement data based on the received MR sensor signals for the respective channel. A synchronization module is coupled to the spectrometer of the respective channel. The synchronization module is configured to synchronize the spectrometer of the respective channel with spectrometers in other channels via a communication link.

Abstract: A system and method are provided for producing at least one of an image or a map of a subject. The method includes controlling a magnetic resonance imaging system to perform a pulse sequence that includes at least one phase increment of an RF pulse of a gradient echo pulse sequence configured to encode longitudinal relaxation (T1) information in an imaginary component of a magnetic resonance (MR) data received from the subject and encode at least transverse relaxation (T2) information in a real component of the MR data received from the subject. The method also includes generating a T1 image or map of the subject or a T2 image or map of the subject from the MR data and displaying the T1 image or map or the T2 image or map of the subject.

Abstract: Image enhancement systems and methods with variable number of excitation (NEX) acquisitions accelerated using compressed sensing for magnetic resonance (MR) imaging are provided. The MR system comprises a body coil adapted to emit electromagnetic waves onto the anatomy of interest and receive the signals emitted from the anatomy of interest. The system comprises variable number of excitations (NEX) based compressed sensing by acquisition of different points in k-space using the body coil. A first neural network comprising an image enhancement module is provided to reconstruct the body coil images that provides a high-quality image. The high-quality image is stored in an image database. A processor is configured to connect the image database to a second neural network that is a deep learning network trained to assess the image quality and provide feedback to the processor and the first neural network.

Abstract: Methods and systems are provided for deblurring medical images using deep neural networks. In one embodiment, a method for deblurring a medical image comprises receiving a blurred medical image and one or more acquisition parameters corresponding to acquisition of the blurred medical image, incorporating the one or more acquisition parameters into a trained deep neural network, and mapping, by the trained deep neural network, the blurred medical image to a deblurred medical image. The deep neural network may thereby receive at least partial information regarding the type, extent, and/or spatial distribution of blurring in a blurred medical image, enabling the trained deep neural network to selectively deblur the received blurred medical image.

Abstract: A method for the compensation of magnetic field inhomogeneity in magnetic resonance spectroscopic imaging comprising the steps of using dynamic k-space expansion in combination with parallel imaging.

Abstract: Embodiments relate to cylindrical MRI coil arrays with reduced coupling between coil elements. One example embodiment comprises two or more rows, wherein each row comprises at least three RF coil elements of that row enclosing a cylindrical axis; and a ring comprising an associated portion of each RF coil element of a first row and a second row electrically connected together, wherein the associated portion of each RF coil element of the first row and of each RF coil element of the second row comprises an associated capacitor of that RF coil element, and wherein the associated capacitor of that RF coil element is configured to reduce coupling among the RF coil elements of the first row and the RF coil elements of the second row.

Abstract: A wireless communication device includes a housing, an antenna, a metal plate, a sensor and a controller. The antenna placed within the housing. The metal plate is detachably placed in the housing. The metal plate is higher in electric conductivity than the housing and has a surface facing the antenna when the metal plate is placed in the housing. The sensor is configured to sense placement of the metal plate. The controller is configured to receive a result of sensing detected by the sensor.

Abstract: Provided is an apparatus of reconstructing a magnetic resonance (MR) image, the apparatus including: a memory storing instructions; and at least one processor configured to execute the instructions to: obtain a plurality of segments of K-space data corresponding to a plurality of pulses which are applied to an object based on a pulse sequence; determine, based on radio frequency (RF) coils of the apparatus, a correction coefficient for merging the plurality of segments of K-space data; and generate a magnetic resonance (MR) image of the object by merging the plurality of segments of K-space data based on the determined correction coefficient.

Abstract: An NMR spectrometer includes a compensation system comprising at least one target sample coil and a lock sample coil positioned in a volume of interest between the main magnet poles of a main field magnet that generate a main magnetic field, at least one compensation coil for compensating a drift of the main magnetic field within the volume of interest, at least one target channel for generating RF-pulses with a target excitation frequency, and a lock data treatment system comprising a lock channel for generating RF-pulses with a lock excitation frequency, the lock data treatment system adapting a compensation current in the at least one compensation coil and correcting simultaneously the target frequency by applying a target frequency correction offset at the target channel. The spectrometer lock channel is improved, particularly for measurements where the lock coil and the target coil are positioned separately within the volume of interest.

Abstract: Disclosed is a technique related to a method and apparatus for generating a preamble and a data frame for wireless communication, and to a synchronization estimation method using the preamble. According to the technique, a method for generating a frame for wireless communication is disclosed, wherein the method comprises: a step of generating a modified sequence using a first base sequence for synchronization estimation; and a step of allocating the first base sequence and the modified sequence to the frequency domain of a first timeslot to generate a preamble. The modified sequence includes a complex conjugated sequence of the first base sequence or a sequence having a code different from that of the first base sequence.

Abstract: Apparatus, systems, and methods may operate to correct measured voltage data for selected weak differential measurements to provide corrected voltage data. Additional activity may include adjusting the corrected voltage data to remove level shifts in the measured voltage data caused by downhole tool impedance to provide adjusted voltage data, converting the adjusted voltage data into apparent resistivity data, inverting the apparent resistivity data to determine true resistivity values for a geological formation, and operating a controlled device according to the true resistivity values for the geological formation. Additional apparatus, systems, and methods are disclosed.

Abstract: In some aspects, a method of operating a magnetic resonance imaging system comprising a B0 magnet and at least one thermal management component configured to transfer heat away from the B0 magnet during operation is provided. The method comprises providing operating power to the B0 magnet, monitoring a temperature of the B0 magnet to determine a current temperature of the B0 magnet, and operating the at least one thermal management component at less than operational capacity in response to an occurrence of at least one event.

Abstract: A method for generating a magnetic resonance image of an object in a magnetic resonance imaging (MRI) system, wherein the object contains at least one metallic implant is provided. The MRI system provides multiple excitations of at least part of the object. The MRI system reads out image signals from the object. The MRI system saves the readout image signals as image data. A field-map is generated from the image data using a goodness-of-fit process which uses a goodness-of-fit metric, matched-filter, and/or similar fitting techniques to fit expected signals from each excitation to the image data.

Abstract: A system for imaging a subject is provided. The system includes a radiation source, a radiation detector, and a controller. The radiation source is operative to transmit electromagnetic rays through the subject. The radiation detector is operative to receive the electromagnetic rays after having passed through the subject so as to generate a plurality of projections of the subject. The controller is operative to display one or more selectively adjustable markers that define an image stack. The controller is further operative to reconstruct one or more images within the image stack based at least in part on the plurality of projections. Reconstruction of the one or more images is on demand.

Abstract: A magnetic resonance (MR) signal receiving apparatus has multiple local coils, capable of separately receiving MR signals generated by a body in an MR examination, each of the local coils having multiple antenna units and a time division multiplexing module. The time division multiplexing module enables MR signals received by the antenna units separately to be provided as an output by just one output line. The apparatus also has a reception coil channel selector having multiple input interfaces connected to the respective output lines of the multiple local coils, and a combiner in the reception coil channel selector that combines in time or power, all or a portion of the MR signals of the local coils, to form one or more MR composite signals.

Abstract: A symmetric model representing anatomical structures of the brain is adapted to a brain scan image with a transform. First and second points provided on first and second hemispheres of the brain image and a patient-specific symmetric anatomical model of the brain is computed based on the transformation.

Abstract: A radio frequency (RF) coil assembly for magnetic resonance imaging includes a transmit only (Tx only) RF coil to apply an RF signal to an object, and a receive only (Rx only) RF coil to receive a magnetic resonance signal from a region of interest of the object excited by the applied RF signal. The Tx only RF coil and the Rx only RF coil are disposed such that a first center of the Tx only RF coil and a second center of the Rx only RF coil are spaced apart from each other by a distance identical to a distance between a first peak point of a first magnetic field generated by the Tx only RF coil and a second peak point of a second magnetic field generated by the Rx only RF coil.

Abstract: A computer-implemented method for sparse recovery of fiber orientations using a multidimensional Prony method for use in tractography applications includes performing magnetic resonance imaging to acquire a plurality of sparse signal measurements using a q-space sampling scheme which enforces a lattice structure with a predetermined number of collinear samples. Next, for each voxel included in the plurality of sparse signal measurements, a computer system is used to perform a parameter estimation process. This process includes translating a portion of the sparse signal measurements corresponding to the voxel into a plurality of Sparse Approximate Prony Method (SAPM) input parameters, and applying a SAPM process to the SAPM input parameters to recover a number of fiber populations, a plurality of orientation vectors, and a plurality of amplitude scalars.

Abstract: In a method and apparatus for recording magnetic resonance (MR) signals from an examination object, raw data space is filled with MR signals in raw data lines. Movement information of the examination object is detected during recording of the MR signals and the movement information is grouped into different movement phases of the examination object. A temporally randomly distributed sequence of the recording of the raw data lines is determined, with which at least one predetermined portion of the raw data space is filled MR signals. The MR signals are acquired in the determined temporally randomly distributed sequence of the raw data lines in the predetermined portion. Each recorded raw data line is allocated to one of the movement phases of the examination object.

Abstract: In one embodiment, an MRI apparatus, which is wirelessly connected to a wireless RF coil equipped with a plurality of coil elements, includes memory circuitry configured to store at least one program and processing circuitry configured, by executing the at least one program, to (a) set an imaging region of an object, (b) identify a position of each of the plurality of coil elements included in the wireless RF coil based on a signal obtained by radio communication with the wireless RF coil, and (c) select at least one of the plurality of coil elements with respect to three axes, based on positional relationship between the imaging region and the position of each of the plurality of coil elements.

Abstract: A method of performing spatially localized magnetic resonance spectroscopy includes receiving a magnetic resonance image of an object; identifying a plurality C of compartments that generate magnetic resonance spectroscopy signals in the object including at least one compartment of interest; segmenting in at least one spatial dimension the magnetic resonance image of the object into the C compartments; acquiring magnetic resonance spectroscopy signals from the compartments by applying a plurality of M? phase encodings applied in the at least one spatial dimension, wherein M??C; calculating a spatially localized magnetic resonance chemical shift spectrum from the at least one compartment of interest; and rendering a spatially localized magnetic resonance spectrum that is substantially equal to a spatial average of magnetic resonance chemical shift spectra from the at least one compartment of interest. A magnetic resonance spectroscopy and imaging system is configured to perform the above method.

Abstract: A method and apparatus for receiving (RX) radio-frequency (RF) signals suitable for MRI and/or MRS from MRI “coil loops” (antennae) that are overlapped and/or concentric, and each of which has a preamplifier and frequency-tuning circuitry and an impedance-matching circuitry, but wherein the loops optionally sized differently and/or located at different elevations (distances from the patient's tissue) in order to extract signal from otherwise cross-coupled coil loops and to improve signal-to-noise ratio (SNR) in images made from the received signal.

Abstract: Systems and methods for magnetic resonance imaging (“MRI”) using a frequency swept excitation that utilizes multiple sidebands to achieve significant increases in excitation and acquisition bandwidth are provided. The imaging sequence efficiently uses transmitter power and has increased sensitivity as compared to other techniques used for imaging of fast relaxing spins. Additionally, the imaging sequence can provide information about both fast and slow relaxing spins in a single scan. These features are advantageous for numerous MRI applications, including musculoskeletal imaging, other medical imaging applications, and imaging materials.

Abstract: Various embodiments include apparatus and methods to make resistivity measurements in a borehole using tool having an array of electrodes operable to provide focused currents, measure corresponding voltages, and measure corresponding voltage differences to determine resistivity. Tools can be configured to operate at a plurality of modes when voltage differences at some frequencies are effectively unreadable. Additional apparatus, systems, and methods are disclosed.

Abstract: In a method and magnetic resonance apparatus for automated establishing of the resonant frequency or resonant frequencies, especially of protons for magnetic resonance experiments, at least one signal, especially an FID is acquired and Fourier transformed to a spectrum. The number of resonance peaks of the spectrum is determined and the resonant frequency or resonant frequencies are established dependent on the number of peaks.

Abstract: Methods and compositions are provided for objectively characterizing a pathological lesion in a patient. The method comprises: introducing into the patient a contrast enhancing agent; subjecting the patient to magnetic resonance imaging to obtain an image; and applying a 3-D autocorrelation function to a subdomain of interest of the image to obtain at least one 3-D autocorrelation spectrum. The method may further comprise comparing the at least one 3-D autocorrelation spectrum to a pre-existing 3-D autocorrelation spectrum that is characteristic for the pathological lesion. In one example, the methods and compositions may be useful for identifying and objectively characterizing amyloid plaque deposits characteristic of Alzheimer's Disease.

Abstract: In a method to correct a signal phase in the acquisition of MR signals of an examination subject in a slice multiplexing method, in which MR signals from at least two different slices of the examination subject are detected simultaneously in the acquisition of the MR signals, a linear correction phase in the slice selection direction is determined for each of the at least two slices. An RF excitation pulse with a slice-specific frequency is radiated in each of the at least two different slices. A slice selection gradient is activated during a slice selection time period, during which the different RF excitation pulses are radiated in the at least two different slices, and the slice selection time period has a middle point in time in the middle of the slice selection time period, and the different RF excitation pulses temporally overlap for the at least two different slices.

Abstract: A method for magnetic resonance imaging is provided that includes using a magnetic resonance imaging system to excite a field of view (FOV) for a target being imaged, using an excitation plan to limit the excited FOV to a relatively narrow band of magnetization, exciting multiple bands of magnetization simultaneously, applying phase encoding along a shortest FOV dimension, acquiring a signal from said simultaneously excited bands of magnetization, and reconstructing and outputting a target image from the acquired signal.

Abstract: The enhanced dynamic range RF pulse measurement system accepts an RF source for spectral analysis. The system includes an RF splitter accepting the RF source under analysis as input. The split output connects to identical precision timing insertion units (TIU) 1 and 2, each time tagging its respective RF signal stream. TIU 1 feeds a first real-time spectrum analyzer (RSA 1) set for strong signals at an exemplary ?3.00 dBm reference level. TIU 2 feeds a second real-time spectrum analyzer (RSA 2) set for weak signals at an exemplary ?15.00 dBm reference level. Outputs of RSA 1 and RSA 2 are then fed to a multi-channel recorder which records the respective time tagged RF signal streams. For each signal stream real-time PDW processing is performed. Output of the recorder feeds a workstation that for any given time tag selects and processes the channel having the highest quality signal.

Abstract: Systems and methods for rapidly ramping the magnetic field of a superconducting magnet, such as a superconducting magnet adapted for use in a magnetic resonance imaging system, are provided. The magnetic field can be rapidly ramped up or down by changing the current density in the superconducting magnet while monitoring and controlling the superconducting magnet's temperature to remain below a transition temperature. A superconducting switch is used to connect the superconducting magnet and a power supply in a connected circuit. The current generated by the power supply is then adjusted to increase or decrease the current density in the superconducting magnet to respectively ramp up or ramp down the magnetic field strength in a controlled manner. The ramp rate at which the magnetic field strength is changed is determined and optimized based on the operating parameters of the superconducting magnet and the current being generated by the power supply.

Abstract: The disclosed embodiments provide a method for acquiring MR data at resolutions down to tens of microns for application in in vivo diagnosis and monitoring of pathology for which changes in fine tissue textures can be used as markers of disease onset and progression. Bone diseases, tumors, neurologic diseases, and diseases involving fibrotic growth and/or destruction are all target pathologies. Further the technique can be used in any biologic or physical system for which very high-resolution characterization of fine scale morphology is needed. The method provides rapid acquisition of signal at selected values in k-space, with multiple successive acquisitions at individual k-values taken on a time scale on the order of microseconds, within a defined tissue volume, and subsequent combination of the multiple measurements in such a way as to maximize SNR.

Abstract: A computer-implemented method for reconstructing magnetic resonance images using a parallel computing platform comprising a host unit and a graphical processing device includes receiving a plurality of coil data sets from a magnetic resonance imaging system, each respective coil data set comprising scanner data and a coil sensitivity map associated with a distinct coil included in the magnetic resonance imaging system. An iterative compressed-sensing reconstruction process is applied to reconstruct an image based on the plurality of coil data sets.

Abstract: Described embodiments include a system, apparatus, and method. An apparatus includes an array of at least two groups of at least two artificially structured electromagnetic unit cells. Each group of the at least two groups configured to be respectively linearly arranged with respect to the z-axis of the bore of MRI or NMR device. Each group of the at least two groups of artificially structured electromagnetic unit cells configured to transform an incident pulse of radiofrequency electromagnetic waves into a pulse of radiofrequency magnetic field B1 orientated transverse to a segment of the z-axis and spatially proximate to the group. The apparatus includes a radiofrequency electromagnetic wave conducting structure configured to selectably distribute a received pulse of radiofrequency electromagnetic waves to a group of the at least two groups.

Abstract: Described embodiments include an apparatus, and a method. An apparatus includes an array of at least two artificially structured electromagnetic unit cells. The at least two artificially structured electromagnetic unit cells are configured to generate a pulse of radiofrequency magnetic field B1 orientated transverse to the quasistatic magnetic field B0 parallel to the z-axis of the bore of a MRI or NMR device by transforming an incident pulse of radiofrequency electromagnetic waves. The generated pulse having magnetic field intensity sufficient to excite a detectable magnetic resonance in magnetically active nuclei located within at least a portion of an examination region located within the bore. The apparatus includes a radiofrequency electromagnetic wave conducting structure configured to distribute a received pulse of radiofrequency electromagnetic waves as an incident pulse of radiofrequency electromagnetic waves to the at least two artificially structured electromagnetic unit cells.

Abstract: Described embodiments include a system, apparatus, and method. A system includes an array of at least two groups of at least two artificially structured electromagnetic unit cells. Each group includes a controllable amplifier responsive to a B1 localization control signal and configured to amplify a received pulse of radiofrequency electromagnetic waves. Each group includes an electromagnetic wave conducting structure configured to deliver an amplified pulse of radiofrequency electromagnetic waves to the at least two artificially structured electromagnetic unit cells. The at least two artificially structured electromagnetic unit cells are configured to transform the incident amplified pulse into a pulse of radiofrequency magnetic field B1 orientated transverse to a segment of the z-axis.

Abstract: Described embodiments include a system, apparatus, and method. An apparatus includes an assemblage of artificially structured electromagnetic unit cells. The assemblage of artificially structured electromagnetic unit cells includes a first artificially structured electromagnetic unit cell configured to transform incident radiofrequency electromagnetic waves into a radiofrequency magnetic field B perpendicular to the plane of the assemblage. The assemblage of artificially structured electromagnetic unit cells includes a second artificially structured electromagnetic unit cell configured to transform the incident radiofrequency electromagnetic waves into an electric field E counteracting a non-vanishing electric field component generated by the first artificially structured electromagnetic unit cell.

Abstract: A method for highly accelerated projection imaging (“HAPI”) is provided. In this method, conventional linear gradients are used to obtain coil sensitivity-weighted projections of the object being imaged. Only a relatively small number of projections, such as sixteen or less, of the object are required to reconstruct a two-dimensional image of the object, unlike conventional projection imaging techniques. The relationship between the voxel values of the imaged object and the coil sensitivity-weighted projections is formulated as a linear system of equations and the reconstructed images are obtained by solving this matrix equation. This method advantageously allows higher acceleration rates compared to echo planar imaging (“EPI”) with SENSE or GRAPPA acceleration. Moreover, the method does not require any additional or specialized hardware because hardware in conventional MRI scanners is adequate to implement the method.

Abstract: Example embodiments relate to a water/fat image identification method and device including obtaining a water/fat image pair calculated by a Dixon method, and marking these as a first image and a second image; calculating grayscale histograms for the first image and the second image, respectively, to obtain a first grayscale histogram and second grayscale histogram; subtracting the second grayscale histogram from the first grayscale histogram to obtain a water/fat relationship graph; searching for the highest peak and lowest trough in the water/fat relationship graph, and if the highest peak is located behind the lowest trough, determining the first image as being a water image and the second image as being a fat image; and otherwise, determining the opposite.

Abstract: A magnetic resonance coil arrangement for a magnetic resonance device includes at least two coil elements that may be read and/or controlled via an amplifier, and a matching circuit for power and/or noise matching between the at least two coil elements and the amplifier. Components of the matching circuit are dimensioned for wideband matching to a frequency band. The frequency band is limited by outermost relevant coupling modes that are displaced from the resonant frequency. The coupling modes occur due to the interaction of a coil element with at least one adjacent coil element.

Abstract: In a method and a magnetic resonance (MR) system for functional MR imaging of a predetermined volume segment of THE brain of a living examination subject, an RF excitation pulse is radiated into the subject and at least one magnetic field gradient is activated, and MR data of the predetermined volume segment is acquired beginning at a predetermined echo time after the RF excitation pulse. The echo time is in a time period of 10 ?s to 1000 ?s.

Abstract: According to some embodiments, an image processor includes an image generator, a region acquirer, and a label applicator. The region acquirer acquires at least one two-dimensional region designated on at least one first perspective image generated from three-dimensional volume data of a target. The label applicator applies a label on at least one first three-dimensional region. The at least one first three-dimensional region is a part of a second three-dimensional region. The second three-dimensional region is defined by the at least one two-dimensional region, a point and a surface which is defined by a set of straight lines between the point and the boundary of the two-dimensional region. The first three-dimensional region is defined to be a first overlapping region where the three-dimensional volume data and the second three-dimensional region overlap.

Abstract: A controller of a magnetic resonance system outputs a low frequency base signal to a conversion device. While outputting the base signal to the conversion device, the controller outputs an oscillator control signal to an oscillator. The oscillator outputs a frequency signal corresponding to the oscillator control signal to the conversion device. The conversion device converts the frequency signal into a high frequency transmit pulse with the aid of the base signal and outputs the transmit pulse to a magnetic resonance transmit antenna. The magnetic resonance transmit antenna applies a high frequency field corresponding to a transmit pulse to an examination volume of the magnetic resonance system. The controller varies the oscillator control signal output to the oscillator while outputting the base signal to the modulator. The transmit pulse) has a larger bandwidth than the base signal.

Abstract: A method related to Magnetic Particle Imaging (MPI) includes a signal processing step in which MPI time signals are acquired and successive acquisition cycles are completed within one scanning period. From the scanning period, an image acquisition period is selected for which a composite time signal is generated by concatenating measured values acquired in immediate succession. A corrected time signal is determined from the composite time signal by windowing, performing a Fourier transform, and reducing a number of frequency values by eliminating intermediate frequencies of the Fourier transform of the windowed, composite time signal. In a reconstruction step, a spatial assignment and/or distribution of the magnetic particles is computed, and in an outputting step, the results of the reconstruction and/or one or more parameters derived therefrom are stored and/or displayed.

Abstract: According to some aspects, a method of suppressing noise in an environment of a magnetic resonance imaging system is provided. The method comprising estimating a transfer function based on multiple calibration measurements obtained from the environment by at least one primary coil and at least one auxiliary sensor, respectively, estimating noise present in a magnetic resonance signal received by the at least one primary coil based at least in part on the transfer function, and suppressing noise in the magnetic resonance signal using the noise estimate.

Abstract: In a method for rephasing a first spin system in a first slice with a first coherence curve and a second spin system of a second slice with a second coherence curve, in the generation of MR images with slice multiplexing, a first RF pulse deflects the spin system of the first slice and a second RF pulse deflects the spin system of the second slice. The beginning of the second RF pulse is time-shifted with respect to the beginning of the first RF pulse by a time period that is shorter than the duration of the first RF pulse. A rephasing correction impresses a correction phase on at least one of the spin systems, and signals of the spin systems are respectively detected. The coherence curves are rephased so detection of the signals occurs simultaneously.

Abstract: A system and method involve performing electron paramagnetic resonance on an object under study. The system comprises a first field generator adapted for generating an orienting magnetic field for orienting the magnetization of the object under study and a second field generator adapted for generating RF excitation waves at a frequency to generate electron paramagnetic resonance (EPR) in the object under test. The system also comprises a detection unit adapted for detecting the EPR signals emitted by the object under test and a control unit adapted for controlling the relative orientation of the orienting magnetic field induced by the first field generator with respect to the detection unit. The system furthermore comprises a processing unit programmed for combining detected EPR signals obtained using different relative orientations of the orienting magnetic field with respect to the detection unit.

Abstract: According to some aspects, a method of suppressing noise in an environment of a magnetic resonance imaging system is provided. The method comprising estimating a transfer function based on multiple calibration measurements obtained from the environment by at least one primary coil and at least one auxiliary sensor, respectively, estimating noise present in a magnetic resonance signal received by the at least one primary coil based at least in part on the transfer function, and suppressing noise in the magnetic resonance signal using the noise estimate.

Abstract: A magnetic resonance imaging apparatus includes an acquisition unit which acquires first data in which a tissue of interest has higher signal intensity than a background and second data in which the tissue of interest has lower signal intensity than the background, with regard to images of the same region of the same subject, and a generation unit which generates, on the basis of the first data and the second data, third data in which the contrast of the tissue of interest to the background is higher than those in the first and second data.

Abstract: Techniques for correcting measurement artifacts in MR thermometry predict or anticipate movements of objects in or near an MR imaging region that may potentially affect a phase background and then acquire a library of reference phase images corresponding to different phase backgrounds that result from the predicted movements. For each phase image subsequently acquired, one reference phase image is selected from the library of reference phase images to serve as the baseline image for temperature measurement purposes. To avoid measurement artifacts that arise from phase wrapping, the phase shift associated with each phase image is calculated incrementally, that is, by accumulating phase increments from each pair of consecutively scanned phase images.