Abstract: The present invention relates to parameter quantification for reproducible characterization of measured magnetic resonance signal variations in biological tissues due to variation in contrast-weighting levels. The method uses comprehensive sampling and higher-order model analysis to attain a more complete description of the signal variation at high signal-to-noise ratio. The signal variation described by the higher-order model fit is subsequently used for retrospective fit analysis based on a more basic model and a flexible sampling pattern. This approach greatly facilitates reproducibility of parameter quantification, since sampling inconsistencies can readily be accounted for.

Abstract: Determining parameter values in image points of an examination object in an MR system by an MRF technique. Comparison signal waveforms, established using predetermined recording parameters, and each assigned to predetermined values of the parameters to be determined, are loaded. An image point time series of the examination object is acquired with an MRF recording method such that the acquired image point time series are comparable with the loaded comparison signal waveforms. A signal comparison of a section of the respective signal waveform of the acquired one image point time series is carried out with a corresponding section of loaded comparison signal waveforms to establish similarity values. The values of the parameters to be determined on the basis of the most similar comparison signal waveforms determined are determined, and then stored or output.

Abstract: A method for shaping an RF pulse for use with an MRI system includes shaping an RF pulse for use with an MRI system that uses an RF coil. The RF pulse is shaped to reduce changes in B1 amplitude and in an off-resonance effect with respect to Larmor frequency as a function of distance from the RF coil.

Abstract: An exemplary system, method, and computer-accessible medium for generating a particular image which can be a quantitative image(s) of at least one section(s) of a patient(s) or (ii) a non-synthetic contrast image(s) of the section(s) of the patient(s), can include, for example, generating a first magnetic resonance (MR) signal and detecting the first MR signal to patient(s), receiving a second MR signal from the patient(s) that can be based on the first MR signal, and generating the particular image(s) based on the second MR signal. The first MR signal can be a configured MR signal. The configured MR signal can be configured for a particular contrast. The first MR signal can have a constant signal intensity. The first MR signal can be generated based on a degree of a plurality of flip angles that maintains the constant signal intensity. A degree of flip angles can be selected for the first MR signal based on the particular contrast.

Abstract: The present patent disclosure describes a new method and a new device for determining a spatial distribution of at least one tissue parameter within a sample based on a time domain magnetic resonance, TDMR, signal emitted from the sample after excitation of the sample according to an applied pulse sequence. The spatial distribution is determined using a calculated sparse Hessian, wherein the sparse Hessian is calculated based on the applied pulse sequence.

Abstract: A method for producing a streak-suppressed MR image of a subject includes (i) generating an interference correlation matrix from M coil images, (ii) producing eigenvectors of the interference correlation matrix, and (iii) determining, from the subspace-eigenvectors, a projection matrix of the interference null space. The subspace-eigenvectors include a plurality of subspace-eigenvectors that span an interference subspace and a plurality of null-space-eigenvectors that span an interference null space.

Abstract: Disclosed herein is a medical system (100, 300, 500) comprising: a memory (110) storing machine executable instructions (120) and a processor (104).

Abstract: A magnetic resonance measurement apparatus according to the present invention includes a first LC circuit that forms an oscillating magnetic field that causes an object to exhibit magnetic resonance. The first LC circuit includes a parallel connection assembly including a diode. The parallel connection assembly further includes a diode connected, in parallel and in reverse direction, to the diode, or an inductor connected in parallel to the diode. In a first state in which oscillating voltage for forming the oscillating magnetic field is applied to the first LC circuit, the diode of the parallel connection assembly functions as a short-circuit such that the resonance frequency of the first LC circuit becomes a first resonance frequency.

Abstract: An image forming apparatus to form an image on a recording material includes a photosensitive member, an exposure device to form a latent image on the photosensitive member, a tubular body defining a space in which at least a part of the exposure device is contained, and a support portion that supports the exposure device and is provided along a rotation axis direction of the photosensitive member in the space of the tubular body. The image forming apparatus further includes, in the rotation axis direction, a first side plate fixed to one end portion of the tubular body, and a second side plate fixed to another end portion of the tubular body. One support portion end portion in the rotation axis direction is fixed to the first side plate, and another support portion end portion in the rotation axis direction is fixed to the second side plate.

Abstract: Method for mapping the transverse relaxation times (T2) in a magnetic resonance imaging (MRI) scan defined over a plurality of pixels, where each pixel is associated with a multicomponent T2 (mcT2) signal, comprises: accessing a computer readable medium storing an mcT2 dictionary having a set of synthetic mcT2 signals, and selecting a subset of synthetic mcT2 signals for which correlations between the synthetic mcT2 signals and pixels in the MRI scan are highest among the set. For each of at least a portion of the pixels, a respective mcT2 scan signal is fitted to the subset to provide, a plurality of T2 values for the pixel. A T2 map of the MRI scan is generated based on the T2 values.

Abstract: For reconstruction of an image in MRI, unsupervised training (i.e., data-driven) based on a scan of a given patient is used to reconstruct model parameters, such as estimating values of a contrast model and a motion model based on fit of images generated by the models for different readouts and times. The models and the estimated values from the scan-specific unsupervised training are then used to generate the patient image for that scan. This may avoid artifacts from binning different readouts together while allowing for scan sequences using multiple readouts.

Abstract: In accordance with a method for operating an MRT system a first MR recording is performed so as to map an object to generate first MR data that represents the object. The first MR recording is performed in accordance with a first k-space scanning scheme and during the first MR recording at least one first excitation pulse is transmitted. A second MR recording that is different from the first MR recording is performed to generate second MR data and a noise component is determined in dependence upon the second MR data by a computing unit and the noise component represents an influence of at least one external noise source. An MR image is generated by the computing unit in dependence upon the first MR data and in dependence upon the noise component.

Abstract: A method includes deriving spatial permeability along a core axis by saturating the rock with an aqueous solution, performing T2 NMR on the saturated rock to detect spatial NMR data along the core axis, desaturating the rock, performing T2 NMR on the desaturated rock to detect spatial NMR data along the core axis, determining the spatial cutoff data for the saturated and desaturated rock along the core axis, and analyzing the spatial NMR data. The method further includes deriving spatial permeability along a second core axis by additionally performing T2 NMR on the saturated rock to detect spatial NMR data along a second core axis, performing T2 NMR on the desaturated rock to detect spatial NMR data along a second core axis, and determining the spatial cutoff data for the saturated and desaturated rock along the second core axis.

Abstract: A light-emitting device including: a light-emitting unit extending in one direction; an emission surface that is provided at the light-emitting unit along the one direction, and emits light in a light-emitting direction, the light-emitting direction and the one direction crossing each other; a base that is located in a direction opposite to the light-emitting direction of the light-emitting unit, and on which the light-emitting unit is removably provided; and a cleaning mechanism that includes a cleaning unit cleaning the emission surface by moving along the one direction, the cleaning mechanism allowing the light-emitting unit to be removed from the base while at least a portion of the cleaning mechanism remains on an object other than the light-emitting unit.

Abstract: A moisture detecting apparatus includes: a light emitting unit including a first light source configured to emit light having a first wavelength as a peak wavelength, and a second light source configured to emit light having a second wavelength as a peak wavelength; a detecting unit configured to detect a first detection value indicating an extent to which the light emitted from the first light source is transmitted through a recording material, and a second detection value indicating an extent to which the light emitted by the second light source is transmitted through the recording material, based on a light receiving result of a light receiving unit; and a determination unit configured to determine a value related to a moisture content of the recording material based on the first detection value and the second detection value.

Abstract: The disclosure is directed to an Echo-Planar-Imaging (EPI) magnetic resonance imaging techniques combined with a variable-density undersampling scheme. The technique comprises generating an RF pulse, applying a switched frequency-encoding read out gradient in a variable time interval, and applying simultaneously an intermittently blipped low-magnitude phase-encoding gradient with a variable value of an integral of the phase-encoding gradient. The aforementioned steps are carried out such that the k-space is at least partially undersampled and the time interval of one read out gradient is varied depending on the integral of the phase encoding gradient, such that a ratio between the variable time interval of the read out gradient and the integral of the corresponding phase encoding gradient is kept above or at a predetermined constant value, which is related to a predetermined criteria of image quality.

Abstract: Acquisition of MR data with a compressed sensing technique in a volume section includes ascertaining an extent of magnetic field distortion within the volume section. A first gradient along a first direction is switched. An RF excitation pulse is radiated for selective excitation of a slice in the volume section while the first gradient is switched. The MR data is acquired in a volume of the volume section that is composed of the slice, a partial volume above the slice, and a partial volume below the slice by executing the following multiple times: switching a first phase-encoding gradient along a second direction; switching a second phase-encoding gradient along the first direction; and reading out the MR data in a k-space line while a readout gradient is switched along a readout direction. A set of k-space lines to be read out for the volume is determined in dependence on the extent.

Abstract: The present disclosure relates to magnetic resonance imaging technology for simultaneously measuring a plurality of magnetic resonance imaging parameters.

Abstract: A radio frequency (RF) antenna arrangement comprising an RF antenna element and an optical back-end. The RF antenna element comprises an electrically conductive loop, an electronic pre-amplifier and a photo-electrical conversion element. The optical back-end comprising an optical power source and a photodetector. The RF antenna element and the optical back-end being optically coupled, and wherein the optical power source is optically coupled to the photo-electrical conversion element. The photo-electrical conversion element generates upon incidence of optical power from the optical power source an electrical power signal to the pre-amplifier. The photo-electrical conversion element generates optical data signals from electrical data signals picked-up by the electrically conductive loop. The photo-electrical conversion element applies the optical data signals to the photodetector.

Abstract: Anatomical, physiological, instrumental, and other related biases are removed from functional magnetic resonance imaging (“fMRI”) signal data using deep learning algorithms and/or models, such as a neural network. Bias characterization data are used as an auxiliary input to the neural network. The bias characterization data can be subject-specific bias characterization data (e.g., cortical thickness maps, cortical orientation angle maps, vasculature maps), hardware-specific bias characterization data (e.g., coil sensitivity maps, coil transmission profiles), or both. The subject-specific bias characterization data can be extracted from the fMRI signal data using a second neural network. The bias-reduced fMRI signal data can include time-series signals, functional activation maps, functional connectivity maps, or combinations thereof.