Abstract: In one embodiment, a superconducting magnet includes: at least one primary superconducting coil configured to generate a primary magnetic field; at least one secondary superconducting coil configured to generate a secondary magnetic field in a direction opposite to a direction of the primary magnetic field; and a superconducting shim coil configured to surround part or all of an outer surface of at least one of the at least one primary superconducting coil and the at least one secondary superconducting coil and corrects distribution of a static magnetic field generated by both the at least one primary superconducting coil and the at least one secondary superconducting coil.

Abstract: The method includes performing, using a nuclear magnetic resonance (NMR) tool, a Carr-Purcell-Meiboom-Gill (CPMG) measurement by transmitting a first excitation pulse and a first plurality of refocusing pulses, and obtaining a first set of NMR echo signals. The method also includes performing a modified CPMG measurement by transmitting a second excitation pulse and a second plurality of refocusing pulses, and obtaining a second set of NMR echo signals. The second excitation pulse is shifted by 0 or ? radians relative to the first excitation pulse. A first refocusing pulse of the second plurality of refocusing pulses is shifted by 0 or ? radians relative to the second excitation pulse. A subsequent refocusing pulses are shifted by ?/2 or ??/2 radians relative to the second excitation pulse. Further, the method includes obtaining a transient-corrected echo train based on the CPMG measurement and the modified CPMG measurement.

Abstract: A protection circuit senses when one supply circuit in a group is activating to deliver current to a circuit component and issues firing signals to simultaneously activate other supply circuits in the group. The supply circuits may deliver large currents and high power. The protection circuit may prevent damage to a system that might otherwise occur if one supply circuit in the group activates in isolation.

Abstract: In the context of a method according to the disclosure for generating measurement data from an imaging area in a measurement volume of a magnetic resonance system, using a PETRA method, a pulse duration of at least one RF excitation pulse radiated during a single-shot recording method of the PETRA method is extended compared to a pulse duration of RF excitation pulses radiated during a radial recording method of the PETRA method, whereby computing operations for correcting disruptive aliasing may be simplified.

Abstract: Provided is a technology capable of effectively obtaining a ringing correction effect even for a two-dimensional image or a three-dimensional image with a simple CNN configuration. A CNN that has been trained to perform ringing correction for a direction of a dimension lower than a dimension of an image that is a correction target is prepared, and the CNN is applied in multiple stages to perform the ringing correction. For training the CNN, an image captured by increasing a measurement matrix size in one or two directions need only be used, thereby reducing an imaging time for acquiring training data and a burden of data processing, and enabling handling of images of various dimensions.

Abstract: Techniques are provided for imaging a subject. A magnetic resonance imaging (MRI) system may use at least one RF coil to generate an initial MR data set for an initial image of the subject. The MRI system may use the initial MR image to determine a difference in orientation between a current orientation of the subject in the initial MR image and a target orientation of the subject. The MRI system may use the determined difference in orientation to determine an adjustment to a gradient pulse sequence for controlling at least one gradient coil. The MRI system may apply the determined adjustment to the gradient pulse sequence to obtain an adjusted gradient pulse sequence. The MRI system may generate an adjusted MR data set using the adjusted gradient pulse sequence, and a second MR image of the subject using the adjusted MR data set.

Abstract: A brain measurement apparatus includes: a magnetoencephalograph module having a cell; a pump laser configured to emit pump light; a probe laser configured to emit probe light; an optical sensor group configured to detect a polarization plane angle of the probe light having passed through the sensitivity region; a bias magnetic field coil configured to apply a bias magnetic field; and bias magnetic field gradient correction coils configured to correct a gradient of the bias magnetic field; and an MRI module having a transmission coil for transmitting an RF pulse of a predetermined frequency and a receiver coil configured to detect a nuclear magnetic resonance signal. At least one of the coil that applies a static magnetic field and the coil that applies a gradient magnetic field is configured by the same coil as the bias magnetic field coil or the bias magnetic field gradient correction coils.

Abstract: A magnetic resonance imaging apparatus according to an embodiment includes a main apparatus and a coil apparatus that is separate from the main apparatus. The main apparatus transmits a wireless signal acquired by frequency-modulating a binary signal based on a first clock signal generated from a first system clock. The coil apparatus generates a second clock signal by dividing the received wireless signal, and generates a second system clock from the generated second clock signal. Frequencies of the second system clock and the first system clock are the same.

Abstract: The present disclosure provides a system for MRI. The system may obtain a plurality of echo signals relating to a subject that are excited by an MRI pulse sequence applied to the subject. The system may perform a quantitative measurement on the subject based on the plurality of echo signals. The MRI pulse sequence may include a CEST module configured to selectively excite exchangeable protons or exchangeable molecules in the subject, an RF excitation pulse applied after the CEST module configured to excite a plurality of gradient echoes, and one or more refocusing pulses applied after the RF excitation pulse. Each of the refocusing pulses may be configured to excite one or more spin echoes. The one or more spin echoes excited by at least one of the one or more refocusing pulses may include a symmetric spin echo and one or more asymmetric spin echoes.

Abstract: A method for production line nuclear magnetic resonance (NMR) measurement of a fluid comprising a material having a single resonance frequency, the method includes: (a) positioning a reference sample comprising the material and a sample of the fluid within a sensing region of an NMR measurement unit coil of a production line NMR measurement device, and within a magnetic field of a permanent magnet of the production line NMR measurement device, wherein a concentration of the material within the reference sample is of a known value; (b) performing an NMR measurement comprising feeding at least one radio frequency coil of the production line NMR measurement device with a signal having a spectrum that comprises a characteristic frequency of a nucleus of the material, and generating detection signals indicative of sensed radio frequency emissions associated with the reference sample and the sample of the fluid; (c) processing the detection signals to provide an NMR spectrum comprising a first peak associated with

Abstract: A magnetic resonance (MR) simulation apparatus according to an embodiment includes processing circuitry. The processing circuitry updates and obtains, for each of voxels, an electron-spin density matrix based on a pulse sequence for acquisition of MR signals. For each of the voxels, the processing circuitry computes, during an acquisition period for the MR signals in the pulse sequence, an observation value representing a predetermined observation by using the density matrix, and computes a spatial partial differential of the observation value based on the pulse sequence. The processing circuitry computes a signal value for output based on the observation value and the spatial partial differential of the observation value. The signal value represents a sum of the MR signals in the voxels.

Abstract: Embodiments of the present disclosure provides a tuning device for a receiving coil, a cryogenic probe, and a magnetic resonance device. The tuning device may include a fixed capacitor, a varactor assembly, and a control assembly. The fixed capacitor and the coil may be connected in series. The varactor assembly may be connected in parallel to both ends of the fixed capacitor. The control assembly may be configured to control the capacitance of the receiving coil by controlling the capacitance value of the varactor assembly to perform a tuning operation on the receiving coil, the tuning operation including at least one of a frequency tuning and an impedance tuning.

Abstract: A synchronisation system comprises aa sensor arrangement to detect a trigger base event. An analysis module and an arithmetic unit are configured to access prior information on a time delay between the sensor arrangement's detection of the trigger base and a starting point of an acquisition time interval for acquiring imaging data. The starting point is computed of the acquisition time interval from the detected trigger base event and the prior information of the time delay. The time delay between the sensor arrangement's detection of the trigger base event and the acquisition time interval may vary between individual subjects, but for each individual subject the time delay is well reproducible and hence on a per subject basis may be calibrated for.

Abstract: A method for parameterizing a gradient performance of a magnetic resonance imaging system using an electronic computing facility of the magnetic resonance imaging system includes specifying a first limit value for the gradient performance in dependence on potential nerve stimulation of a patient, and specifying a second limit value for the gradient performance in dependence on potential cardiac muscle stimulation of the patient. The method also includes parameterizing a maximum gradient amplitude of a pulse of the gradient performance and a slew rate of the pulse in dependence on the first limit value and the second limit value.

Abstract: Systems and methods are provided for producing diffusion-weighted images of a subject using a magnetic resonance imaging (MRI) system. The method includes performing a stimulated echo preparation module using non-selective radio-frequency (RF) pulses designed to induce a stimulated echo, performing an acquisition module that includes a multi-slice acquisition of MR data in the presence of diffusion gradients, and reconstructing the diffusion-weighted images of the subject from the MR data.

Abstract: An MRI coil having embedded therein a Diagnostic Interface Device (or DID); means for plugging the embedded DID of the MRI coil to a frequency-testing power source, said embedded DID adapted for: (a) measuring the status of certain key electrical conditions for the coil; (b) receiving a response back from the signals initially aimed at the coil in question; (c) processing those responses received; and (d) transferring the measured electronic status (using a specific code number for the coil) to a remote storage area on the internet. A method of use is also disclosed.

Abstract: A system and method for compensation of radiofrequency (RF) spatial encoding misalignment errors due to gradient non-linearity in magnetic resonance imaging is described. The true magnetic field produced by the gradient coils in space are taken into account in order to encode the appropriate frequency band and offset of the RF pulse corresponding to the desired spatial encoding position and thickness. This method is applicable to any positionally (frequency) encoded radiofrequency (RF) pulses including slice or slab excitation pulses, inversion pulses, spin echo (refocusing) pulses and spatial saturation pulses.

Abstract: In an approach to measuring a magnetic field of a sample, a system includes an optical fiber comprising a first end and a second end, the optical fiber having a core; and a nitrogen vacancy (NV) diamond sensor; where the first end of the optical fiber is configured to receive excitation light from an optical excitation source; and the NV diamond sensor is coupled to the second end of the optical fiber with an optical matching material, the optical matching material configured to optically match the NV diamond sensor to the core of the optical fiber.

Abstract: A sensor system is based on diamonds with a high density of NV centers. The description includes a) methods for producing the necessary diamonds of high NV center density, b) characteristics of such diamonds, c) sensing elements for utilizing the fluorescence radiation of such diamonds, d) sensing elements for utilizing the photocurrent of such diamonds, e) systems for evaluating these quantities, f) reduced noise systems for evaluating these systems, g) enclosures for using such systems in automatic placement equipment, h) methods for testing these systems, and i) a musical instrument as an example of an ultimate application of all these devices and methods.

Abstract: A resonant power circuit, a magnetic resonance imaging system, and a transformer are provided. The resonant power circuit is disposed within a scan room of a magnetic resonance imaging system, and is used for supplying power to a switch device in a radio-frequency amplifier of the magnetic resonance imaging system. The resonant power circuit includes: an inverter circuit, a resonant transformer circuit, and a rectifier circuit. The ratio of a resonant frequency is greater than 1 and less than a first threshold, a series resonant frequency being determined according to a resonant capacitor and a resonant inductor.