Abstract: A method for the simultaneous recording of magnetic resonance data relating to an examination subject from at least two different slices by a magnetic resonance sequence, wherein an excitation period of the magnetic resonance sequence that includes at least one sub-section that acts on only one of the slices, and that contains at least one high frequency pulse is used, wherein, to correct the main magnetic field inhomogeneities of the first order, for each slice affected by a sub-section, a correction parameter that modifies the gradient pulses that are to be emitted is determined, taking into account at least one main magnetic field map that describes the spatial distribution of the main magnetic field and a slice position of the affected slice and is applied in the emission of gradient pulses for the respective slice in the sub-section.

Abstract: A method for generating a spatially resolved magnetic resonance dataset using a coil arrangement includes providing at least one correction datum based on receiver characteristics of the coil arrangement. The method also includes providing a magnetic resonance dataset with spatially resolved signal intensity data, and correcting the at least one signal intensity datum in the magnetic resonance dataset by the correction datum before or after providing the magnetic resonance dataset.

Abstract: Systems and methods for noninvasively determining the function capacity of the kidney are provided. In the methods, first contrast agent is injected into the vasculature of a subject. The contrast agent is to be bound with functioning glomeruli of the kidney of the subject. Then, the kidney is imaged with a magnetic resonance imaging (MRI) system to acquire MRI images of the kidney. In the images, signal magnitudes or phases of voxels of regions bound with the contrast agent are different from signal magnitudes or phases of voxels of regions not bound with the contrast agent. Afterwards, the function capacity of the kidney is determined using the MRI images. Lastly, a report of the function capacity of the kidney is generated.

Abstract: Parallel transmit Magnetic Resonance MR scanner used to image a conductive object such as an interventional device like a guidewire within a subject. This is achieved by determining which Radio Frequency RF transmission modes produced by the parallel RF transmission elements couple with the conductive object and then transmitting at significantly reduced power so as to prevent excessive heating of the conductive object to an extent that would damage the surrounding tissue of the subject, for example, the coupling RF transmission modes may be generated at less than 30%, preferably around 10% of the normal power levels that would conventionally be used for MR imaging. However, even at these low power levels sufficient electric currents are induced in the conductive device to cause detectable MR signals; the location of the conductive object within the subject can thus be visualised.

Abstract: Systems and methods for simultaneous radio frequency (“RF”) transmission and reception for nuclear magnetic resonance applications, such as magnetic resonance imaging (“MRI”) are described. The system includes a simultaneous transmit and receive (“STAR”) control system that compensates for the effects of load changes in a radio frequency (“RF”) coil due to the inevitable motion of living subjects (e.g., from subject motion, respiration, swallowing). The system also maintains a high transmit-receive isolation, even when scanning a subject using a continuous RF broad band sweep excitation.

Abstract: A magnetic resonance vessel wall imaging method and device. The method comprises: applying a set pulse sequence into an imaging region, wherein the set pulse sequence comprises, in chronological order, a Delay Alternating with Nutation for Tailored Excitation (DANTE) pulse train, a variable flip angle train of a three-dimensional fast spin echo (SPACE), and a flip-down pulse train (S110); acquiring a magnetic resonance signal generated in the imaging region, and reconstructing a magnetic resonance images of the vessel wall in the imaging region according to the magnetic resonance signal (S120). By adding the flip-down pulse train behind the variable flip angle train of the three-dimensional fast spin echo (SPACE), the cerebrospinal fluid signals of the whole brain can be further suppressed effectively and uniformly, and the DANTE pulse train promotes the vessel wall imaging of the head and neck jointing portion.

Abstract: Described here are systems and methods for reconstructing images of a subject using a magnetic resonance imaging (“MRI”) system. As part of the reconstruction, synthesized data are estimated at arbitrarily specified k-space locations from measured data at known k-space locations. In general, the synthesized data is estimated using a convolution operation that is based on measured or estimated covariances in the acquired data. The systems and methods described here can thus be referred to as Convolution Operations for Data Estimation from Covariance (“CODEC”).

Abstract: Systems and methods for mapping the transmit sensitivity of one or more radio frequency (“RF”) coils for use in magnetic resonance imaging (“MRI”) are described. The transmit RF field (“B1+”) for an RF coil, or an array of RF coils, is mapped using a robust, motion-insensitive technique that implements Bloch-Siegert shifts performed with interleaved positive and negative off-resonance shifts. The motion insensitivity of this technique makes it particularly useful for applications where there is significant motion, such as cardiac imaging, in which previous B1+ mapping techniques are not as accurate or effective.

Abstract: Dynamic magnetic resonance imaging methods and devices are provided. According to an example, a method includes: collecting respective k-space data for each of imaging phases by scanning a part of a subject via an equidistant undersampling manner, determining basic k-space data for the part of the subject, determining respective differential k-space data for each of the imaging phases based on the respective k-space data for each of the imaging phases and the basic k-space data, obtaining a basic image based on the basic k-space data, determining a respective sparse image for each of the imaging phases, reconstructing a respective differential image for each of the imaging phases from the respective differential k-space data for the imaging phase, and obtaining a respective magnetic resonance image for each of the imaging phases based on the respective differential image for the imaging phase and the basic image.

Abstract: According to one embodiment, an RF coil apparatus includes coil elements and multiplexing circuitry. The coil elements each receive magnetic resonance signals. The multiplexing circuitry multiplexes the magnetic resonance signals received respectively by the coil elements, by using a local signal. The multiplexing circuitry includes mixer circuitry and matching circuitry. The mixer circuitry has a local port for inputting the local signal that includes a local frequency. The mixer circuitry converts at least one frequency among the magnetic resonance signals in accordance with the local frequency of the local signal input via the local port. The matching circuitry matches, in a narrow band, a local signal that is to be input to the local port with the local frequency.

Abstract: The invention relates to a system for performing echo-planar spectroscopic imaging. The system comprises an acquisition unit for acquiring magnetic resonance data, wherein the acquisition unit is adapted to use a first encoding gradient in a readout direction and a second encoding gradient in a phase-encoding direction, wherein the first encoding gradient and the second encoding gradient are stepped. The system further comprises a reconstruction unit for reconstructing a magnetic resonance image based on the acquired magnetic resonance data.

Abstract: A magnetic resonance examination system is provided with a graphical user interface and an (software) analysis module. The analysis module is configured to analyze examination information, notably a selected examination protocol, for actions to be taken by the operator, such as connecting auxiliary equipment or radio frequency receiver coils to the magnetic resonance examination system. The analysis module supplies the actions to be taken to the (graphical) user interface at the proper instant before or during carrying-out the examination protocol. In this way the operator is guided and supported in the performance of the selected examination protocol. This improves the efficiency of workflow in performing one or more selected protocols. Preferably, the graphical user interface is provided inside the examination room and may be mounted on the gantry.

Abstract: In a magnetic resonance (MR) apparatus and an operating method therefor, MR data are acquired from a patient using an MR sequence wherein, after at least one excitation pulse, multiple refocusing pulses are radiated during a readout period. The respective strengths of the refocusing pulses proceed according to a first flip-angle variation over time that is defined so as to minimize the SAR of the patient. A multislice imaging technique is used for simultaneous excitation and readout of at least two slices of a slice group of the patient, and flip-angle variations, which differ from the first variation, are selected in order to further reduce the SAR of the patient, compared with the use of identical flip-angle variations.

Abstract: Some implementations provide a system that includes: a housing having a bore in which a subject to be image is placed; a main magnet configured to generate a volume of magnetic field within the bore, the volume of magnetic field having inhomogeneity below a defined threshold; one or more gradient coils configured to linearly vary the volume of magnetic field as a function of spatial location; one or more pulse generating coils configured to generate and apply radio frequency (RF) pulses to the volume of magnetic field in sequence to scan the portion of the subject; one or more shim gradient coils configured to perturb a spatial distribution of the linearly varying volume of magnetic field; and a control unit configured to operate the gradient coils, pulse generating coils, and shim gradient coils such that only the user-defined region within the volume of magnetic field is imaged.

Abstract: Techniques are disclosed for carrying out ferromagnetic resonance (FMR) testing on whole wafers populated with one or more buried magnetic layers. The techniques can be used to verify or troubleshoot processes for forming the buried magnetic layers, without requiring the wafer to be broken. The techniques can also be used to distinguish one magnetic layer from others in the same stack, based on a unique frequency response of that layer. One example methodology includes moving a wafer proximate to a waveguide (within 500 microns, but without shorting), energizing a DC magnetic field near the target measurement point, applying an RF input signal through the waveguide, collecting resonance spectra of the frequency response of the waveguide, and decomposing the resonance spectra into magnetic properties of the target layer. One or both of the DC magnetic field and RF input signal can be swept to generate a robust set of resonance spectra.

Abstract: The present invention generally relates to a method of using NMR relaxation rates (R2) of water molecules as an indicator of the extent of aggregation of biopharmaceutical formulations. The biopharmaceutical can be evaluated nondestructively without the vial or container being opened or protective seal compromised (i.e., broken). The method is applicable to all biopharmaceuticals and the water signal obtained by magnetic resonance relaxometry is very strong and sensitive because water is used as the solvent and is present in high (>90%) concentrations in every biopharmaceutical formulation.

Abstract: In a magnetic resonance (MR) apparatus, and model-based method, for identifying a nuclear spin-dependent attribute of a subject, MR signals are acquired in multiple repetitions of an MR data acquisition sequence that is changed from repetition-to-repetition so as to deliberately encode effects of magnetization transfer between nuclear spins into the acquired MR signals. A model is generated, composed of at least two molecule pools, in which a single magnetization transfer parameter is used that is derived from the MR signals in which the magnetization transfer is encoded. A nuclear spin-dependent attribute of the subject is then identified, by comparing at least one MR signal evolution from the subject to at least one signal evolution produced by the model.

Abstract: Nuclear magnetic resonance (NMR) methods and apparatus are provided for investigating a sample utilizing NMR pulse sequences having solid state and CPMG pulse sequence portions. Various embodiments of solid state pulse sequences may be utilized including two-dimensional (repetitive) line-narrowing sequences. The hydrogen content of a solid portion of the sample may be determined by using one or more echoes resulting from the solid state sequence portion of the pulse sequence to establish a total organic hydrogen content of the sample, and by using a CPMG echo train to establish a fluid organic hydrogen content, and by subtracting one from the other to obtain the hydrogen content of the sample's solid portion. Additionally, or alternatively, the T2 values obtained from the line-narrowing and CPMG pulse sequences can be compared by plotting to obtain information regarding a characteristic of the sample. The NMR pulse sequence may also include a T1 portion.

Abstract: A magnetic resonance device includes a radiofrequency unit that includes a radiofrequency antenna, at least one radiofrequency line and at least one radiofrequency injection point. Radiofrequency signals are transferred to the radiofrequency antenna by the at least one radiofrequency line and are coupled into the radiofrequency antenna at the at least one radiofrequency injection point. The magnetic resonance device also includes a patient receiving zone that is at least partially enclosed by the radiofrequency antenna, and a motion detection unit for detecting a movement of a patient that may be positioned within the patient receiving zone. At least one radiofrequency line includes at least one injection element by which at least one motion detection signal of the motion detection unit is coupled into the radiofrequency line.

Abstract: Systems and methods provide for advanced video editing techniques using sampling patterns. In one example, a computing device can receive a selection of a clip of a video and a sampling pattern. The computing device can determine a respective number of frames to sample from the clip for each interval of time over a length of time for a new clip. For example, the computing device can determine a function corresponding the pattern that relates time and the number of frames to sample, a histogram corresponding to the pattern, or a definite integral corresponding to the pattern, among other approaches. The computing device can extract these numbers of frames from the clip and generate the new clip from the extracted frames. The computing device can present the new clip as a preview and send the new clip to other computing devices.

Abstract: Aspects of the present disclosure relate to magnetic resonance thermometry. In one embodiment, a method includes acquiring undersampled magnetic resonance data associated with an area of interest of a subject receiving focused ultrasound treatment, and reconstructing images corresponding to the area of interest based on the acquired magnetic resonance data, where the reconstructing uses Kalman filtering.

Abstract: In a method and magnetic resonance (MR) apparatus for avoiding artifacts in scan data recorded by execution of a spin-echo sequence, an excitation pulse is radiated, at least one refocusing pulse is radiated, and at least one echo signal is read out. Following the radiation of the excitation pulse and before the readout of the at least one echo signal, at least two artifact-avoidance gradients with different amplitudes are activated, wherein the moments of the artifact-avoidance gradients balance each other.

Abstract: A system and method are provided for acquiring a plurality of differently-weighted images of a subject using a single pulse sequence. The method includes determining imaging parameters for a pulse sequence that includes a diffusion weighted module and an anatomical imaging module. The imaging parameters include at least a repetition time (TR), a mixing time (TM), an echo time (TE), and a diffusion weighting b-value, with at least two different values of at least TM, TE, and diffusion weighting b-value. The method also includes performing a pulse sequence using the imaging parameters to acquire MR image data from a subject. The different values of at least TM, TE, and diffusing weighting b-value are used to acquire the MR image data. Furthermore, the method includes reconstructing, from the MR image data, a plurality of images of the subject, including at least a T1-weighted image, a T2-weighted image, and a diffusion-weighted image.

Abstract: Systems and methods for performing diffusion-weighted multi-spectral imaging (“MS!”) with a magnetic resonance imaging (“MRI”) system are provided, Diffusion-weighted images can thus be acquired from a subject in which a metallic object, such as an implant or other device, is present. In general, a two-dimensional or three-dimensional diffusion-weighted PROPELLER acquisition is performed to acquire data from multiple different spectral bins. Images from the spectral bins are reconstructed and combined to form diffusion-weighted composite images. Non-CPMG phase-cycling and split-blade PROPELLER techniques are combined with PROPELLER MSI metal artifact mitigation principles to this end.

Abstract: Aspects relate to providing radio frequency components responsive to magnetic resonance signals. According to some aspects, a radio frequency component comprises at least one coil having a conductor arranged in a plurality of turns oriented about a region of interest to respond to corresponding magnetic resonant signal components. According to some aspects, the radio frequency component comprises a plurality of coils oriented to respond to corresponding magnetic resonant signal components. According to some aspects, an optimization is used to determine a configuration for at least one radio frequency coil.

Abstract: In a method and apparatus for creating magnetic resonance data of at least two simultaneously manipulated, non-overlapping slices of an examination object by a parallel acquisition technique, reference data are acquired such that, between acquisition of slice scan data of a slice scan data set in which the scan data of all simultaneously manipulated slices are incorporated in an overlaid manner, and its associated reference data, no slice scan data of a different slice scan data set are acquired. A high level of robustness with respect to movements of the examination object is thereby achieved.

Abstract: Systems and methods for cell size imaging using MRI systems are provided. An exemplary method includes obtaining first diffusion MRI data for biological tissues of interest and at least one second diffusion MRI data for the biological tissues of interest having a different diffusion time than the first diffusion MRI data. The method also includes calculating, from the first and at least one second diffusion MRI data, incremental area under curve values of the first and at least one second diffusion MRI data for a chosen diffusion time range. Thereafter, an image for the biological tissues of interest is generated, wherein intensity values for each of the plurality of image voxels is based on a corresponding one of the incremental area under curve values.

Abstract: An MRI apparatus includes, a generating unit configured to generate radio frequency pulses applied in a pulse sequence; a sequence control unit configured to apply a radio frequency pulse related to acquisition of an image signal and a corrective radio frequency pulse during execution of one TR of a pulse sequence; and a calculation unit configured to measure the corrective radio frequency pulse and calculate a correction value for the radio frequency pulse. Based on the correction value, the generating unit corrects a radio frequency pulse related to acquisition of an image signal to be applied during a following TR later than a TR during which the corrective radio frequency pulse is measured.

Abstract: A magnetic resonance imaging apparatus acquires first imaging data of a three-dimensional image including a heart, having a plurality of two-dimensional first imaging area data superimposed one on top of another in parallel, and having a resolution at least in one direction different from a resolution in two other directions. A first axis is detected expressed in three dimensions relating to the heart from the three-dimensional first imaging data. A first vector is calculated passing through the first axis and having at least a predetermined resolution. First image data is generated on a plane passing through the first axis and the first vector from the first imaging data and a second axis is detected relating to the heart from the first image data, the second axis being a higher precision axis.

Abstract: An inert gas nucleus channel device comprising a magnetic resonance control system, a radio frequency generator, an RF amplifier and AD converter, a frequency synthesizer, a first mixer, a second power amplifier, a second T/R switch, an inert gas nucleus coil, a second pre-amplifier and a second mixer. A magnetic resonance imaging method is also disclosed. The method controls an increase or decrease in a frequency of a pulse or echo signal excited by a radio-frequency signal, implementing magnetic resonance imaging using hyperpolarized inert gases (such as xenon, helium, and krypton), making it possible to apply MRI to lungs and brains using the hyperpolarized inert gases, and expanding the probing range of MRI. The inert gas nucleus channel device is simple in structure and easy to operate and upgrades a hydrogen nucleus magnetic resonance imaging instrument to become a multi-nuclei MRI system using the hyperpolarized inert gases.

Abstract: A system and method is provided for generating a map of a tissue property in a subject using magnetic resonance fingerprinting (MRF) and a compressed MRF dictionary, where the compressed MRF dictionary has a significantly reduced memory requirement relative to a standard MRF dictionary. The method includes performing a randomized singular value decomposition (rSVD) on a MRF dictionary to produce the compressed MRF dictionary. MRF data is then acquired and compared to the MRF dictionary to identify the tissue property from the region of interest in the subject. A tissue property map is then generated based on the tissue in the region of interest of the subject.

Abstract: In a method and apparatus for identifying an organ structure of an examined object in magnetic resonance image data, magnetic resonance measurement data for the organ structure of the examined object are acquired by operation of a magnetic resonance scanner using a magnetic resonance sequence that specifies a sampling scheme of k-space. Magnetic resonance image data are reconstructed from the magnetic resonance measurement data. The organ structure is identified in the magnetic resonance image data. The sampling scheme of k-space is selected so as to support the subsequent identification of the organ structure in the magnetic resonance image data reconstructed from the magnetic resonance measurement data.

Abstract: Spike noise in a k-space dataset acquired in magnetic resonance imaging may be removed by generating a mask including a set of data points which constitute spike noise in the k-space dataset based on the acquired k-space dataset via a trained deep learning network, the mask corresponding to a location of the spike noise in the acquired k-space dataset. An image reconstructed based on the acquired k-space dataset and the mask may be displayed.

Abstract: In a method magnetic resonance apparatus, a pulse sequence is optimized in order to identify a time interval of the pulse sequence during which gradient pulses are modifiable, and subdividing that time interval into two time subintervals wherein, during one of these two time subintervals, no gradient pulse is activated. Such an optimized pulse sequence can be repeated in a number of repetitions, during which magnetic resonance data are acquired, with a contiguous gradient being activated between repetitions, that performs the role of a conventional spoiler occurring directly before an RF excitation the contiguous gradient occurs during a duration that is shorter than a time directly following acquisition of data in one repetition and before excitation in the next repetition.

Abstract: According to one embodiment, the magnetic resonance imaging apparatus has a processing circuitry. The processing circuitry generates a conductivity map quantitatively indicating the conductivity in the subject using a susceptibility map quantitatively indicating the susceptibility in the subject.

Abstract: An MR system including a control computer and a digital control device is described. The control computer includes an external digital image data port for transmitting control data, including sequence data and encoded as image data, from the control computer to a digital control device; and the digital control device includes a port, compatible with the external digital image data port of the control computer, for receiving the control data, received from the external digital image data port and designed to extract the sequence data from the received control data, encoded as image data. A method for activating a digital control device via a control computer is also described.

Abstract: In one embodiment, a method for preventing a difference attack on watermarked video content is implemented on at least one computing device and includes: manipulating values of a set of pixels to embed a forensic watermark in at least one video frame in a video content item, where the manipulating is in accordance with a given magnitude of change in the values, and introducing random noise to the at least one video frame, where the random noise is random noise of the given magnitude.

Abstract: One aspect of the present disclosure provides an imaging method including: specifying an imaging focus region on a subject to be imaged, applying radiofrequency pulses to the subject to interact with a magnetic field gradient, wherein the radiofrequency pulses successively bend magnetization phases of respective electromagnetic signals from the specified imaging focus region, resulting in magnified pixel data, and generating a magnified image of the imaging focus region based on the magnified pixel data.

Abstract: Embodiments relate to magnetic resonance imaging (MRI) radio frequency (RF) coil arrays having reduced coupling via hidden transmission lines. One example embodiment comprises a MRI RF coil array comprising: a first RF coil element coupled to a first output transmission cable (e.g., coaxial) that is configured to carry a first signal that is associated with the first RF coil element; a second RF coil element coupled to a second output transmission cable that is configured to carry a second signal that is associated with the second RF coil element, wherein the second RF coil element comprises a first portion of the first output transmission cable; and a first balun configured to reduce coupling associated with the first signal, wherein the first balun is arranged between the first RF coil element and the second RF coil element. Additional coil elements can be similarly combined in embodiments.

Abstract: A magnetic resonance imaging (MRI) techniques uses a T2-preparation outer volume suppression (OVS) pulse sequence to reduce the longitudinal magnetization outside a region of interest. A region is excited that includes the region of interest, radiofrequency (RF) signals are detected, and MRI images generated from the RF detected signals. The T2-preparation OVS pulse sequence includes, sequentially: a first tip-down excitation pulse, a first refocusing excitation pulse, a first tip-up excitation pulse that is selective spatially and/or spectrally, a second tip-down excitation pulse that is 180° out of phase with respect to the first tip-down excitation pulse, a second refocusing excitation pulse, and a second tip-up excitation pulse that is selective spatially and/or spectrally.

Abstract: Various methods and systems are provided for ghost artifact reduction in magnetic resonance imaging (MRI). In one embodiment, a method for an MRI system comprises acquiring a non-phase-encoded reference dataset, calculating phase corrections for spatial orders higher than first order from the non-phase-encoded reference dataset, acquiring a phase-encoded k-space dataset, correcting the phase-encoded k-space dataset with the phase corrections, and reconstructing an image from the corrected phase-encoded k-space dataset. In this way, ghost artifacts caused by phase errors during EPI may be substantially reduced, thereby improving image quality especially when imaging with a large field of view.

Abstract: A magnetic resonance tomograph and a method for tracking a marker in an examination subject by a magnetic resonance tomograph are disclosed. The magnetic resonance tomograph includes a first image recording mode for acquiring the position of the marker. In one act of the method, data for acquiring the position of the marker is recorded with the first image recording mode. In a further act, a position of the marker is determined from the data and a first image with a location-accurate reproduction of the marker is prepared. The recording of the data for acquiring the position of the marker takes place depending on an event.

Abstract: A method for designing one or more multichannel, multiband radio frequency (“RF”) pulses for use with a magnetic resonance imaging (“MRI”) system is provided. The method includes determining a number of RF amplitude modulations and a number of RF phase modulations for each channel in a multichannel RF coil by minimizing an objective function that includes a complex-valued vector. The objective function also contains a system matrix that accounts for both a spatial sensitivity profile of each channel in the multichannel RF coil and a magnetic field map for each excitation band in the multiband RF pulse.

Abstract: According to some aspects, a portable magnetic resonance imaging system is provided, comprising a B0 magnet configured to produce a B0 magnetic field for an imaging region of the magnetic resonance imaging system, a noise reduction system configured to detect and suppress at least some electromagnetic noise in an operating environment of the portable magnetic resonance imaging system, and electromagnetic shielding provided to attenuate at least some of the electromagnetic noise in the operating environment of the portable magnetic resonance imaging system, the electromagnetic shielding arranged to shield a fraction of the imaging region of the portable magnetic resonance imaging system. According to some aspects, the electromagnetic shield comprises at least one electromagnetic shield structure adjustably coupled to the housing to provide electromagnetic shielding for the imaging region in an amount that can be varied.

Abstract: A pH-weighted chemical exchange saturation transfer (CEST) magnetic resonance imaging (MRI) method and system are provided that works by indirectly measuring the NMR signal from amine protons found on the backbones of amino acids and other metabolites, which resonate at a frequency of +2.8-3.2 ppm with respect to bulk water protons. The technique uses a modified magnetization transfer radiofrequency saturation pulse for the generation of image contrast. A train of three 100 ms Gaussian pulses at high amplitude (6 uT) or Sinc3 pulses are played at a particular frequency off-resonance from bulk water prior to a fast echo planar imaging (EPI) readout, with one full image acquired at each offset frequency. This non-invasive pH-weighted MRI technique does not require exogenous contrast agents and can be used in preclinical investigations and clinical monitoring in patients with malignant glioma, stroke, and other ailments.

Abstract: A medical imaging system (100, 1200) includes a memory (136) for storing machine executable instructions (170), and a processor (130) for controlling the medical imaging system.

Abstract: Methods and systems for deep learning based image reconstruction are disclosed herein. An example method includes receiving a set of imaging projections data, identifying a voxel to reconstruct, receiving a trained regression model, and reconstructing the voxel. The voxel is reconstructed by: projecting the voxel on each imaging projection in the set of imaging projections according to an acquisition geometry, extracting adjacent pixels around each projected voxel, feeding the regression model with the extracted adjacent pixel data to produce a reconstructed value of the voxel, and repeating the reconstruction for each voxel to be reconstructed to produce a reconstructed image.

Abstract: In a method for performing MR measurements in an MR system on an object, MR signals of the object are acquired using an imaging sequence with a first set of imaging parameters. An amended copy of the imaging sequence is automatically created with a second set of imaging parameters, which has all the imaging parameters used in the first set, wherein the second set has at least one imaging parameter modified with respect to the first set that differs from the corresponding imaging parameter of the first set according to a defined amendment. The remaining imaging parameters of the second set correspond to the imaging parameters of the first set. The amended copy is automatically configured in a measurement queue in which all the imaging sequences are stored that are to be carried out in the future on the examination object are stored.

Abstract: Methods and systems are provided for indirectly measuring a current of a radiation source. In one embodiment, a method comprises generating a scan dataset by transmitting a radiation from a radiation source directly to a detector; calculating a signal to noise ratio of the scan dataset; and determining a current that was used to generate the scan dataset based on the calculated signal to noise ratio. In this way, current of the radiation source may be evaluated without connecting extra equipment to the radiation source.

Abstract: A method of performing multi-slice acceleration for MR fingerprinting includes obtaining k-space data for MR volumes; applying controlled radio frequency (RF) pulses to the MR volumes; exciting a plurality of slices within the MR volumes by the RF pulses at a same time; and producing a plurality of fingerprints from the plurality of slices. At least one set of fingerprints is compressed, and a residual signal of a plurality of signal evolutions is reduced. The method additionally includes periodically switching a weighting between a first slice and a second slice of the plurality of slices.