Using A Nuclear Resonance Spectrometer System Patents (Class 324/307)
  • Patent number: 11156687
    Abstract: For improving image quality in MRI, a method for magnetic of an object is provided that includes obtaining MRI data during at least a first and a second acquisition step. Each acquisition step includes at least two data acquisition periods. A movement of the object is monitored by a camera system during the acquisition steps. Data obtained during the acquisition periods is adjusted based on the monitoring. Data obtained during a first reference period of the first acquisition step is compared to data obtained during a second reference period of the second acquisition step. The obtained or adjusted data is corrected based on a result of the comparison.
    Type: Grant
    Filed: March 3, 2020
    Date of Patent: October 26, 2021
    Assignee: Siemens Healthcare GmbH
    Inventors: Dominik Paul, Raphael Schwarz
  • Patent number: 11154213
    Abstract: A method and system are provided for detecting a position of a periodically moving organ in a MRI examination. MR images of an examining person including a periodically moving organ are provided over a plurality of periodic cycles of the periodically moving organ. Based on the provided MR images, a pixel frequency is associated with each pixel of the MR images. Using the associated pixel frequencies and the positions of the pixels within the MR images, the position and the frequency of the periodically moving organ are determined.
    Type: Grant
    Filed: April 6, 2018
    Date of Patent: October 26, 2021
    Assignees: CENTRE HOSPITALIER UNIVERSITAIRE VAUDOIS, SIEMENS HEALTHCARE GMBH
    Inventors: Jérôme Chaptinel, Robin Demesmaeker, Jérôme Yerly, Tobias Kober, Davide Piccini
  • Patent number: 11158029
    Abstract: Methods, systems, products, devices, and/or apparatus generally related to distortion correction of multiple MRI images based on a full body reference image. An example method for distortion correction of multiple MRI images based on a full body reference image may include acquiring at least one reference image of a subject using a magnetic resonance imaging system, storing a correction field map based on the at least one reference image, the correction field map including information regarding a correction field for each of a plurality of portions of the subject, acquiring a plurality of images by the magnetic resonance imaging system, each of the plurality of images corresponding to a respective portion of the subject, and while acquiring each of the plurality of images, applying a correction field specified by the correction field map for the respective portion of the subject.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: October 26, 2021
    Assignee: VIGILANCE HEALTH IMAGING NETWORK INC.
    Inventor: Rajpaul Attariwala
  • Patent number: 11147519
    Abstract: Imperfect RF pulses in a multi-spin-echo (MSE) sequence disturb prediction of relaxation times. Provided are a magnetic resonance imaging (MRI) apparatus and method of operating the same, whereby a characteristic parameter value may be acquired from MR signal data via training using an artificial neural network (ANN) and a parametric map may be generated based on the acquired characteristic parameter value. The ANN may be trained to compensate for imperfect RF pulses while providing reduced computation times to produce an output image.
    Type: Grant
    Filed: May 30, 2019
    Date of Patent: October 19, 2021
    Assignees: SAMSUNG ELECTRONICS CO., LTD., SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION
    Inventors: Youngbeom Kim, Doohee Lee, Jongho Lee, Junki Lee, Sangyoung Zho
  • Patent number: 11150315
    Abstract: An object of the present invention is to provide an MRI apparatus capable of optimally setting imaging conditions for map measurement depending on a target value and its required accuracy, and a method for controlling the MRI apparatus. An imaging unit of the MRI apparatus includes, as a pulse sequence, a pulse sequence for the T1 map measurement that includes a first signal acquisition sequence and a plurality of signal acquisition sequences executed after application of an inverted pulse and at different signal acquisition times from the inverted pulse. An imaging controller of the MRI apparatus controls the imaging conditions of each of the plurality of signal acquisition sequences, for example, the signal acquisition time from the inverted pulse and the number of signal acquisition sequences depending on the T1 value of an imaging target and the required accuracy.
    Type: Grant
    Filed: June 12, 2020
    Date of Patent: October 19, 2021
    Assignee: HITACHI, LTD.
    Inventors: Akihiro Odaka, Kousuke Itou
  • Patent number: 11143727
    Abstract: A nuclear magnet resonance (NMR) system probes samples using a stochastically pulsed radio-frequency magnetic field. The NMR system uses active shims to compensate for spatial inhomogeneity in the bias magnetic field applied by a small permanent magnet. The active shim, made of a flexible conductor, creates a magnetic field when current is passed through it. The magnetic field created by the active shim can compensate for a first, second or third order spherical harmonic spatial inhomogeneity. The NMR system may have an array of active shims, with each active shim compensating for a spherical harmonic spatial inhomogeneity. The array of active shims may be arranged within the NMR system so as to increase power efficiency. The NMR system can accommodate a standard NMR sample tube and can be used to measure nuclear spin density or acquire an NMR spectrum.
    Type: Grant
    Filed: May 6, 2020
    Date of Patent: October 12, 2021
    Assignee: Massachusetts Institute of Technology
    Inventors: Ashley Brown Raynal, Ian W. Hunter
  • Patent number: 11137460
    Abstract: A gradient coil assembly for a magnetic resonance imaging system (1) includes at least one gradient coil (2) and a cooling arangement for cooling the gradient coil (2). The gradient coil (2) includes a solid electrical conductor material forming one or more conductor lines (21, 31, 41) which are in direct contact with each other. The cooling arrangement includes a cooling channel (22, 32, 42) for guiding a cooling fluid (10). The cooling channel (22, 32, 42) is arranged outside along the one or more conductor lines (21, 31, 41) in such a way that in a cross-sectional view one single continuous interface line between the cooling channel (22, 32, 42) and the one or more conductor lines (21, 31, 41) is formed. In this way efficient cooling of the gradient coil (2) may be achieved.
    Type: Grant
    Filed: May 3, 2018
    Date of Patent: October 5, 2021
    Assignee: Koninklijke Philips N.V.
    Inventors: Gerardus Bernardus Jozef Mulder, Martijn Krelis Termeer, Theo Jenneskens, Jan Konijn, Guus Van Hest
  • Patent number: 11129541
    Abstract: A method is proposed for recording diagnostic measurement data of a head of an examination object in head imaging via a magnetic resonance device. The method comprises performing an overview scan of the head of the examination object, wherein overview measurement data is acquired in the overview scan and performing various diagnostic scans of the head of the examination object based on the acquired overview measurement data, wherein diagnostic measurement data is acquired in the various diagnostic scans.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: September 28, 2021
    Assignees: SIEMENS HEALTHCARE GMBH, THE GENERAL HOSPITAL CORPORATION
    Inventors: Keith Aaron Heberlein, Thomas Witzel
  • Patent number: 11125845
    Abstract: A deep learning (DL) network is proposed to mitigate artifacts in simultaneous multi-slice (SMS) magnetic resonance imaging (MRI) data. For example, unaliased images generated from SMS aliased images can exhibit leakage artifacts due to inaccuracies in the receive-coil sensitives used during sensitivity encoding (SENSE) processing. To mitigate leakage artifacts, the DL network learns to correct the receive-coil sensitives before SENSE processing, and/or learns to detect and subtract the artifacts from the unaliased images after SENSE processing. The DL network can also be trained to denoise the unaliased images.
    Type: Grant
    Filed: March 22, 2019
    Date of Patent: September 21, 2021
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventor: Anuj Sharma
  • Patent number: 11119166
    Abstract: The invention relates to a local coil matrix and to a magnetic resonance scanner for operation by means of a low magnetic field. The local coil matrix according to the invention has a first coil winding and a second coil winding and a first low-noise pre-amplifier and second pre-amplifier, each electrically connected to a coil winding. The first coil winding has a broadband matching in a first frequency range at a Larmor frequency to the first pre-amplifier connected thereto.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: September 14, 2021
    Assignee: Siemens Healthcare GmbH
    Inventors: Michael Miosga, Robert Rehner, Markus Vester
  • Patent number: 11112472
    Abstract: A gradient system characterization function (e.g., a gradient system transfer function) may be developed by measuring a behavior of the MR device at a target temperature and developing at least one gradient system characterization function for a gradient coil of a magnetic resonance (MR) device at the target temperature based on the measured behavior. A patient may be subsequently imaged by the MR device, wherein the imaging process comprises measuring a temperature of a gradient coil, determining a gradient system characterization function at the measured temperature, calculating a pre-emphasized gradient of the gradient coil, and imaging the patient using the pre-emphasized magnetic field component.
    Type: Grant
    Filed: November 29, 2019
    Date of Patent: September 7, 2021
    Assignees: Siemens Healthcare GmbH, Julius-Maximilians-Universität Würzburg, THE UNITED STATES OF AMERICA, as represented by the Secretary, Department of Health and Human Services
    Inventors: Gudrun Ruyters, Andrew Dewdney, Manuel Stich, Herbert Köstler, Christiane Pfaff, Tobias Wech, Adrienne Campbell
  • Patent number: 11105874
    Abstract: A magnetic resonance unit includes a shim coil apparatus and a gradient coil apparatus. The shim coil apparatus is configured to compensate for basic magnetic field inhomogeneities of the first order in an examination region of the magnetic resonance unit. The shim coil apparatus includes at least one shim coil element. The gradient coil apparatus is arranged in a gradient coil layer. In addition to the gradient coil apparatus, at least one part of the at least one shim coil element is arranged in the gradient coil layer.
    Type: Grant
    Filed: May 16, 2020
    Date of Patent: August 31, 2021
    Assignee: Siemens Healthcare GmbH
    Inventors: Brendan Whelan, Heiko Rohdjeß, Martino Leghissa
  • Patent number: 11105875
    Abstract: A method for a NMR device to determine NMR measurement results of a sample from a set of RF signals emitted by the sample and received by the NMR device is disclosed. The method can include: receiving a plurality of RF signals emitted by the sample; determining a phase shift of each signal of the plurality of RF signals; correcting a phase of each signal of the plurality of RF signals; determining a frequency shift of each signal of the plurality of RF signals; shifting each signal of the plurality of RF signals to the predetermined; correcting an additional phase shift of each signal of the shifted plurality of RF signals to generate corresponding plurality of corrected RF signals; and averaging the corrected RF signals to determine the NMR measurement result. In some embodiments, the receiving, determining, correcting, shifting and/or averaging is done by the NMR device.
    Type: Grant
    Filed: April 7, 2017
    Date of Patent: August 31, 2021
    Assignees: Aspect Imaging Ltd., Aspect AI Ltd.
    Inventors: Itai Cohen, Yoram Cohen, Tal Cohen
  • Patent number: 11105877
    Abstract: Magnetic resonance imaging (MRI) systems and methods determine slice leakage and/or residual aliasing in the image domain in accelerated MRI imaging. Implementations process one slice of MRI image domain data by input to a sensitivity encoding (SENSE) un-aliasing matrix built from predetermined RF signal reception sensitivity maps, thereby producing as matrix output SENSE-decoded MRI image domain data for one pass through image slice and at least one extra slice, and determine inter-slice leakage and/or in-plane residual aliasing based on content of the at least one extra output slice from the SENSE-decoded MRI image domain data.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: August 31, 2021
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventor: Anuj Sharma
  • Patent number: 11103190
    Abstract: Circuits are provided for detecting an electrosurgical unit signal. An example circuit includes: a filter configured to process a floating ground signal associated with measuring a bio potential signal of a patient, and a detector configured to output a sensing signal based at least in part on the floating grounding and the Earth ground for detecting an electrosurgical unit signal.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: August 31, 2021
    Assignee: Drägerwerk AG & Co. KGaA
    Inventors: Daniel K. Freeman, Ronald Gatzke
  • Patent number: 11099250
    Abstract: In a method and apparatus for generating a magnetic resonance data record, at least two excitation cycles are executed, wherein, in each excitation cycle, at least one magnetic resonance signal is recorded, using different phases with a first radio-frequency pulse in two consecutive excitation cycles, with at least one dephasing gradient being applied in an excitation cycle.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: August 24, 2021
    Assignee: Siemens Healthcare GmbH
    Inventors: Dominik Paul, Flavio Carinci, Daniel Nico Splitthoff
  • Patent number: 11101025
    Abstract: A method includes receiving a first patient model of the patient, the first patient model including a first image dataset of the patient, the first image dataset being coordinated relative to a first coordinate system; receiving a second image dataset of the patient, the second image dataset being based on a medical imaging apparatus and being coordinated relative to a second coordinate system; determining a transformation function to transfer the second coordinate system into the first coordinate system; determining a transformed second image dataset based on the second image dataset and the transformation function; and providing a second patient model of the patient, the second patient model including the modified first image dataset.
    Type: Grant
    Filed: October 15, 2019
    Date of Patent: August 24, 2021
    Assignee: Siemens Healthcare GmbH
    Inventor: Stefan Popescu
  • Patent number: 11099251
    Abstract: The present disclosure relates to an automatic method for selecting imaging parameters for imaging methods, to a corresponding imaging method, and to a corresponding imaging apparatus comprising a detection algorithm and a selection algorithm. A ranking of at least one qualifying value for potential clinical indications is created. The ranking is based on image data. The ranking is created by means of the detection algorithm. In addition, at least one imaging parameter is selected. The at least one imaging parameter is suitable for producing image data that facilitates a maximum change in the qualifying values in the ranking. The at least one imaging parameter is selected by means of the selection algorithm.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: August 24, 2021
    Assignee: Siemens Healthcare GmbH
    Inventor: Martin Hammes
  • Patent number: 11090012
    Abstract: A PET-MR apparatus is provided. The PET-MR apparatus may include a first supporting component, a PET detector, a second supporting component, and a radio frequency (RF) coil. The first supporting component may have an inner surface and an outer surface. The PET detector may be supported on the outer surface of the first supporting component. The second supporting component may be at least partially surrounded by the first supporting component. The RF coil configured to generate or receive an RF signal may be supported on the second supporting component.
    Type: Grant
    Filed: May 15, 2019
    Date of Patent: August 17, 2021
    Assignee: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.
    Inventors: Fuyi Fang, Feng Xu, Guanghe Wu, Min Wu
  • Patent number: 11085988
    Abstract: A method for magnetic resonance imaging (MRI) includes steps of acquiring by an MRI scanner undersampled magnetic-field-gradient-encoded k-space data; performing a self-calibration of a magnetic-field-gradient-encoding point-spread function using a first neural network to estimate systematic waveform errors from the k-space data, and computing the magnetic-field-gradient-encoding point-spread function from the systematic waveform errors; reconstructing an image using a second neural network from the magnetic-field-gradient-encoding point-spread function and the k-space data.
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: August 10, 2021
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Feiyu Chen, Christopher Michael Sandino, Joseph Yitan Cheng, John M. Pauly, Shreyas S. Vasanawala
  • Patent number: 11085983
    Abstract: The MRI apparatus includes a processor configured to apply a gradient echo pulse sequence that makes a sum of gradients applied during one repetition time (TR) in a slice selection direction, a phase encoding direction, and a frequency encoding direction equal zero and maintains spins in an object in a steady state; alternately apply, while the gradient echo pulse sequence is continuously applied, a first radio frequency (RF) pulse having a first flip angle and a second RF pulse having a second flip angle that is different from the first flip angle at each TR interval; and generate an MR image based on an echo signal acquired when the spins are in the steady state.
    Type: Grant
    Filed: August 20, 2018
    Date of Patent: August 10, 2021
    Assignees: SAMSUNG ELECTRONICS CO., LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Hyun-seok Seo, Hyun-wook Park, Joon-soo Kim, Seo-hee So, Dae-ho Lee
  • Patent number: 11079449
    Abstract: A method for medical imaging may include determining a posture of an object and obtaining a first parameter of a pulse sequence to be applied to the object. The method may also include determining, based on the posture and the first parameter, a SAR distribution model and estimating, based on the SAR distribution model and a second parameter of the pulse sequence to be applied, a SAR distribution associated with the object under the pulse sequence to be applied. The second parameter is associated with calibration of the pulse sequence to be applied. The method may further include determining whether the estimated SAR distribution meets a condition and causing, in response to a result of the determination that the estimated SAR distribution associated with the object meets the condition, a scanner to perform an MR scan on the object according to the pulse sequence.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: August 3, 2021
    Assignee: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.
    Inventors: Zhenhua Shen, Qiang He
  • Patent number: 11079455
    Abstract: The present disclosure is directed to combined angiography and perfusion using radial imaging and arterial spin labeling.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: August 3, 2021
    Assignee: OXFORD UNIVERSITY INNOVATION LIMITED
    Inventor: Thomas Okell
  • Patent number: 11079224
    Abstract: In this azimuth angle sensor, original magnetic detection data is sequentially acquired as data points in a triaxial coordinate system by detecting magnetism on three axes. An offset derivation device provided to the azimuth angle sensor derives offset values for correcting the original magnetic detection data and generating corrected magnetic detection data. The offset derivation device uses a plurality of data points in the original magnetic detection data or in the corrected magnetic detection data to derive provisional offset values, then derives the magnitude of magnetism on such an occasion on the basis of the original magnetic detection data and the provisional offset values. When the magnitude of magnetism thus derived is within a predetermined correction success range, the offset values are updated using the provisional offset values. When the magnitude of magnetism thus derived is not within the predetermined correction success range, the offset values are not updated.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: August 3, 2021
    Assignee: Rohm Co., Ltd.
    Inventors: Tadashi Kobayashi, Masafumi Seike, Hideki Nishiyama
  • Patent number: 11073586
    Abstract: A magnetic resonance imaging method according to an embodiment includes performing a balanced SSFP sequence, repeatedly applies an excitation RF pulse to a subject at intervals of a repetition time and applies gradient magnetic field pulses balanced such that a time integral becomes zero within each interval of the repetition time, while further applying a spin labeling gradient magnetic field for generating one or more continuous spin labels within each interval of the repetition time.
    Type: Grant
    Filed: November 29, 2019
    Date of Patent: July 27, 2021
    Assignees: Keio University, CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Koichi Oshio, Shinya Yamada, Masao Yui, Seiko Sakuraba
  • Patent number: 11067656
    Abstract: In a method for operating an MRI device, image data is acquired using a spin echo sequence with an additional readout per pulse train for acquiring correction data. By comparing subsequent correction data of later pulse trains to reference data acquired during a first pulse train of the sequence a difference indicating a parameter shift is determined. A corresponding compensation is then automatically determined in dependence on the difference and is applied to a set of predetermined parameters for at least a respective next pulse train and/or to the image data acquired in at least a respective next pulse train of the sequence.
    Type: Grant
    Filed: February 5, 2020
    Date of Patent: July 20, 2021
    Assignee: Siemens Healthcare GmbH
    Inventors: Dominik Paul, Mario Zeller
  • Patent number: 11064901
    Abstract: An apparatus and method are provided to simultaneously provide good image quality and fast image reconstruction from magnetic resonance imaging (MRI) data by selecting an appropriate value for the regularization parameter used in compressed sensing (CS) image reconstruction. In CS reconstruction a high-resolution image can be reconstructed from randomized undersampled data by imposing sparsity in multi-scale transformation (e.g., wavelet) domain. Further, in the transformation domain, a threshold can be determined between signal and noise levels of the transform coefficients. A regularization parameter based on this threshold scales the regularization term, which imposes sparsity, relative to the data fidelity term in an objective function, thereby balancing the tradeoff between noise and smoothing.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: July 20, 2021
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Andrew James Wheaton, Antonios Matakos, Samir Dev Sharma
  • Patent number: 11067518
    Abstract: A whole measurement process includes a plurality of step combinations. Each of the step combinations is composed of a solution-state measurement step and a solid-state measurement step. In the solution-state measurement step, solution-state NMR measurement is performed such that magnetization that is to be used in the solid-state measurement step remains. In the solid-state measurement step, solid-state NMR measurement is performed by using the magnetization that remains. No waiting time for recovering magnetization is provided between the solution-state measurement step and the solid-state measurement step. The solid-state measurement step may be performed earlier, and the solution-state measurement step may be performed later. Alternatively, the two steps may be performed simultaneously.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: July 20, 2021
    Assignees: RIKEN, JEOL Ltd.
    Inventor: Yusuke Nishiyama
  • Patent number: 11065819
    Abstract: The present disclosure allows for more controlled modification of the input data to a Rapid Manufacturing Technologies (RMT) machinery to compensate for systematic error of the manufacturing process, such as directional build discrepancies, by performing the opposite effect to the input data. The modification is achieved with minimal unwanted distortions introduced to other portions of the structure to be built by decoupling the global scaling effects on the whole structure from the desired local effects on certain portions.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: July 20, 2021
    Assignee: Smith & Nephew, Inc.
    Inventor: Ryan Lloyd Landon
  • Patent number: 11067655
    Abstract: In a method for creating a first and a second image dataset of an examination object, a train of RF refocusing pulses are radiated into the examination object after the radiation of an RF excitation pulse to generate a spin echo signal after each radiated RF refocusing pulse, phase encoding gradients are activated for encoding the phases of the spin echo signals generated, and readout gradients are activated in each case in a readout window to read out the generated spin echo signals as measurement data. The readout windows alternately include a first time point at which the phases of the different spin species in the spin echo signal are the same, and a second time point at which the phases of the different spin species in the spin echo signal are not the same.
    Type: Grant
    Filed: May 30, 2019
    Date of Patent: July 20, 2021
    Assignee: Siemens Healthcare GmbH
    Inventor: Mario Zeller
  • Patent number: 11061087
    Abstract: A method includes determining a position of a local coil, a coil position, and a position of a body part of a patient, a body part position. Spacing between the coil position and the body part position is determined. An optimized MR sequence is determined. Based on the determined spacing between the coil position and the body part position, it is checked that in a subsequent MR examination of the patient, a predetermined loading threshold value (e.g., an SAR value) is not exceeded. The optimization of the MR sequence thus takes place under the boundary condition that the loading threshold value is not exceeded.
    Type: Grant
    Filed: July 18, 2019
    Date of Patent: July 13, 2021
    Assignee: Siemens Healthcare GmbH
    Inventors: George William Ferguson, Martin Harder, Daniel Rinck
  • Patent number: 11061094
    Abstract: The present disclosure provides a method that includes applying at least one radiofrequency saturation pulse at a frequency or a range of frequencies to substantially saturate magnetization corresponding to an exchangeable proton in the ROI to generate magnetic resonance (MR) data. The MR data is then acquired using an echo-planar imaging readout, which is configured to sample a series of gradient echo pulse trains at a series of gradient echo times and a series of spin echo pulse trains at a series of spin echo times. One or more relaxometry measurement is then computed using the MR data sampled at the gradient echo times and the spin echo times. An oxygen-weighted image is then generated using the one or more relaxometry measurement, and a pH-weighted image is generated using MR data sampled at one or more of the spin echo times or gradient echo times.
    Type: Grant
    Filed: May 22, 2018
    Date of Patent: July 13, 2021
    Assignee: The Regents of the University of California
    Inventors: Robert Harris, Kevin Leu, Benjamin Ellingson
  • Patent number: 11061095
    Abstract: Disclosed herein are systems and methods for correction of imaging-plane uniform magnetic field—(B0) inhomogeneity-induced magnetic resonance imaging (MRI) artifacts. The systems and methods can be implemented to improve the filtering and correction of arterial spin labeling (ASL) MRI data by forming a tagging dependent Z-spectrum (TADDZ) of ASL MRI data. In TADDZ, images are acquired via ASL, MRI after tagging blood water at a number of tagging, distances upstream and downstream of die MM system's imaging plane. A tagging distance dependent Z-spectrum is analyzed for each image to map the magnetic field inhomogeneity across the imaging plane. Along with magnetic-field mapping, Z-spectrum analysts and data processing enables TADDZ to remove magnetic field inhomogeneity induced artifacts, resulting in more clear and clinically relevant perfusion imaging via MRI.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: July 13, 2021
    Assignee: The Board of Trustees of the University of Illinois
    Inventors: Frederick C. Damen, Kejia Cai
  • Patent number: 11061096
    Abstract: According to an aspect of the present inventive concept there is provided a method of performing diffusion weighted magnetic resonance measurements on a sample, the method comprising: performing a plurality of diffusion weighted magnetic resonance measurements on the sample, wherein said plurality of measurements includes: a first measurement with a first diffusion encoding sequence having a tensor representation with three non-zero eigenvalues, a second measurement with a second diffusion encoding sequence, and a third measurement with a third diffusion encoding sequence, wherein the second and the third diffusion encoding sequence have different spectral content.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: July 13, 2021
    Assignee: CR Development AB
    Inventors: Samo Lasic, Daniel Topgaard, Markus Nilsson, Hans Magnus Henrik Lundell
  • Patent number: 11061097
    Abstract: The invention provides for an MRI system (100) with an RF system for acquiring magnetic resonance data (142). The RF system comprises a set of antenna elements (126). The MRI system (100) further comprises a processor for controlling the MRI system (100). Magnetic resonance data is acquired. Combined image data (144) is reconstructed. The reconstruction comprises transforming the acquired magnetic resonance data (142) from k-space to image space and combining the resulting image data. For each antenna element (126) magnetic resonance data (146) is simulated using the reconstructed combined image data (144). The simulation comprises transforming the reconstructed combined image data (144) from image space to k-space. A phase correction factor is determined, The determination comprises calculating phase differences between the acquired magnetic resonance data (142) and the simulated magnetic resonance data (146). The acquired magnetic resonance data (142) is corrected using the phase correction factor.
    Type: Grant
    Filed: August 15, 2018
    Date of Patent: July 13, 2021
    Assignee: Koninklijke Philips N.V.
    Inventors: Jan Jakob Meineke, Tim Nielsen
  • Patent number: 11055883
    Abstract: A method, system, and computer-readable medium for producing images is described. The system comprises an input image providing unit for providing input images in which structures that are in fact spatially separated are represented in a spatially superimposed manner in at least one spatial direction. The system further comprises a neural network providing unit for providing a neural network which is adapted to produce, on the basis of input images in which structures that are in fact spatially separated are represented in a spatially superimposed manner in at least one spatial direction, output images in which the structures that are in fact spatially separated are represented in a spatially separated manner in the at least one spatial direction. Finally, an image producing unit produces images on the basis of the input images provided and the neural network provided.
    Type: Grant
    Filed: July 4, 2017
    Date of Patent: July 6, 2021
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Markus Wenzel, Klaus Eickel
  • Patent number: 11047941
    Abstract: A magnetic resonance imaging method comprises performing imaging where more than one polarizing magnetic field strength is used during scanning and processing at least one image resulting from the scanning to yield an enhanced contrast image.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: June 29, 2021
    Assignee: THE UNIVERSITY OF WESTERN ONTARIO
    Inventors: Jamu Alford, Blaine Chronik, Brian Rutt
  • Patent number: 11047937
    Abstract: A radio frequency power supply according to an embodiment is a radio frequency power supply that amplifies an input signal including application timing of a radio frequency magnetic field and waveform information and that supplies the amplified input signal to a radio frequency coil. The radio frequency power supply includes an amplifier and a controlling unit. The amplifier amplifies the input signal and to output an amplified signal. The controlling circuity varies power supply voltage used by the amplifier for the amplification of the input signal, in accordance with the input signal.
    Type: Grant
    Filed: July 1, 2019
    Date of Patent: June 29, 2021
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Hirofumi Yamaki, Susumu Kawaguchi, Mitsuyuki Murakami, Hisanori Suzuki, Hajime Tanaka
  • Patent number: 11047943
    Abstract: A protocol to determine chemical shift-specific Ti constants in inhomogeneous magnetic fields is provided. Based on intermolecular double-quantum coherences and spatial encoding techniques, the method can resolve overlapped NMR spectral peaks in inhomogeneous magnetic fields acquired using conventional methods. With inversion recovery involved, the amplitude of spectral peak will be modulated by inversion recovery time. After fitting the spectral peak amplitude variation curve, the corresponding longitudinal relaxation time can be achieved. With the measured T1 values in inhomogeneous magnetic fields, insights into chemical exchange rates, signal optimization, and data quantitation can be obtained.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: June 29, 2021
    Assignee: XIAMEN UNIVERSITY
    Inventors: Shuhui Cai, Hao Chen, Zhong Chen
  • Patent number: 11047945
    Abstract: Generation of a preview image using magnetic resonance signals is provided. A method for the generation of a preview image using magnetic resonance signals includes acquiring a first part and a second part of magnetic resonance signals. During the acquisition of the first part of the magnetic resonance signals, a first k-space is regularly sampled, while, during the acquisition of the second part of the magnetic resonance signals, a second k-space is sampled in a pseudorandomized manner. The first part of the magnetic resonance signals is used to generate a preview image. The second part or the second part and a subset of the first part of the magnetic resonance signals are stored for the generation of a second image.
    Type: Grant
    Filed: March 12, 2016
    Date of Patent: June 29, 2021
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Mathias Nittka
  • Patent number: 11041930
    Abstract: According to one embodiment, the MRI apparatus includes an RF coil apparatus having a coil element, a coil port to which the RF coil apparatus is connectible, receive circuitry receiving a signal detected by the RF coil apparatus via the coil port when neither an RF pulse nor a gradient magnetic field is being applied, and performing A/D conversion with an A/D converter, and processing circuitry detecting an abnormality based on the signal. With the RF coil apparatus being connected to the coil port, the receive circuitry switches at least one switch provided in a section between the coil element and the A/D converter between on and off, and receives the signal. The processing circuitry compares a signal of a path where the coil element and A/D converter are connected with a signal of a path where the coil element and A/D converter are not connected, and detects the abnormality.
    Type: Grant
    Filed: May 3, 2018
    Date of Patent: June 22, 2021
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Shinji Mitsui, Keiji Tahira
  • Patent number: 11041927
    Abstract: An apparatus and method of detecting a characteristic in an image is performed by obtaining, from an image capturing apparatus, raw signal data formed from a plurality of data samples and including a signal of interest captured by the image capturing apparatus and classifying, using a neural network, samples other than the signal of interest using a classifier having been determined using a first parameter based on information about the sample and a second parameter based on information identifying a position of the sample within the raw image data.
    Type: Grant
    Filed: May 13, 2020
    Date of Patent: June 22, 2021
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Andrew James Wheaton, Anuj Sharma
  • Patent number: 11041921
    Abstract: In one embodiment, an MRI apparatus includes: a scanner that is provided with at least an RF coil and a gradient coil and is configured to acquire a magnetic resonance (MR) signal emitted from an object in response to applications of an RF pulse outputted from the RF coil and a gradient magnetic field generated by the gradient coli; and processing circuitry configured to reconstruct a diagnostic image of the object based on the MR signal, generate distortion correction data for correcting a non-linear characteristic of the gradient magnetic field to a linear characteristic that is defined by gradient magnetic field strength at a correction position away from a magnetic field center of the gradient coil and distance from the magnetic field center to the correction position, and correct the diagnostic image by using the distortion correction data.
    Type: Grant
    Filed: November 25, 2019
    Date of Patent: June 22, 2021
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Yoshitomo Sakakura, Hidekazu Tanaka
  • Patent number: 11041923
    Abstract: A directly coolable multifilament conductor or a magnetic coil, having at least two electric conductors and at least one cooling tube disposed between the conductors adapted to carry a fluid coolant, wherein the cooling tube is a metal conductor having a lower conductivity than the conductors surrounding the tube.
    Type: Grant
    Filed: August 9, 2019
    Date of Patent: June 22, 2021
    Assignee: Siemens Healthcare GmbH
    Inventors: Stefan Stocker, Peter Dietz
  • Patent number: 11033199
    Abstract: Magnetic resonance elastography (MRE) is an imaging technique for estimating the stiffness of tissues non-invasively. Shear waves are generated via external mechanical actuation and the tissue imaged with a specially designed MR pulse sequence. The resulting images are used to calculate the underlying properties. The application provides methods for acquiring MRE data using a single shot, echo planar imaging readout. The purpose of the developed sequence is to acquire MRE data using a single-shot, echo-planar imaging readout, avoiding to need for off-line image processing.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: June 15, 2021
    Assignee: THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ILLINOIS
    Inventors: Curtis L. Johnson, Bradley Sutton
  • Patent number: 11035921
    Abstract: In a method for operating a magnetic resonance (MR) facility during recording of MR data by using a MR sequence including a saturation module for a spin type to be saturated, in which a high-frequency saturation pulse is emitted between first and second spoiler gradient pulses, and multiple further gradient pulses apart from the spoiler gradient pulses, eddy current data is determined. The eddy current data describes eddy currents existing during emission of the saturation pulse and resulting from the further gradient pulses. Further, a pulse parameter of the first spoiler gradient pulse is selected based on the eddy current data such that the eddy currents generated by the first spoiler gradient pulse compensate for at least part of the eddy currents described by the eddy current data during emission of the saturation pulse. The facility is controlled to emit the first spoiler gradient pulse with the selected pulse parameter.
    Type: Grant
    Filed: August 28, 2019
    Date of Patent: June 15, 2021
    Assignee: Siemens Healthcare GmbH
    Inventors: Uvo Hoelscher, Michael Koehler, Daniel Niederloehner, Alto Stemmer
  • Patent number: 11035918
    Abstract: In a method and magnetic resonance (MR) apparatus for reducing artifacts in an image dataset reconstructed from MR raw data that were acquired by radial sampling using different coil elements, for each of at least some of the coil elements, exclusion information is determined that identify MR data from that coil element that are responsible for at least one artifact, by a comparison of a sensitivity map, which defines a spatial reception capability of that coil element, with at least one comparison dataset obtained from at least a portion of the MR data from that coil element. At least the MR data identified from the exclusion information are excluded from the reconstruction of the image dataset.
    Type: Grant
    Filed: November 19, 2018
    Date of Patent: June 15, 2021
    Assignee: Siemens Healthcare GmbH
    Inventors: Ralf Kartaeusch, Dominik Paul
  • Patent number: 11029382
    Abstract: Techniques are described for generating an MR image of an object using a multi spin-echo based imaging sequence with a plurality of k space segments using a preparation pulse. The technique included acquiring a first k-space dataset of the object using a first echo time and a first delay after the preparation pulse before the several spin-echoes are acquired. The technique further includes acquiring a second k space dataset of the object using a second echo time and a second delay after the preparation pulse, with at least one of the second echo time and the second delay time being different from the corresponding first echo time and the first delay time, generating a combined k space, and generating the MR image based on the combined k space dataset.
    Type: Grant
    Filed: January 23, 2020
    Date of Patent: June 8, 2021
    Assignee: Siemens Healthcare GmbH
    Inventors: Flavio Carinci, Dominik Paul, Mario Zeller
  • Patent number: 11029381
    Abstract: Provided is an MRI image generation method including: acquiring first phase encoding lines obtained by undersampling along a first direction using an MRI device; acquiring second phase encoding lines obtained by undersampling in a second direction different from the first direction using the MRI device; generating a first MRI image based on the first phase encoding lines and the second phase encoding lines; and generating a second MRI image different from the first MRI image based on the first phase encoding lines and the second phase encoding lines.
    Type: Grant
    Filed: January 14, 2019
    Date of Patent: June 8, 2021
    Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Sung-Hong Park, Ki-Hwan Kim
  • Patent number: 11022667
    Abstract: The disclosure relates to a system and method for generating or using a synthesizing filter in image reconstruction. The method may include: acquiring a calibration data set including a plurality of data points, determining a first calibration region in the calibration data set, the first calibration region including a matrix having a plurality of data points, the plurality of data points includes a first data point at the center of the first calibration region, constructing a first relationship between the first data point and the data points in the first calibration region, and generating a synthesizing filter based on the first relationship. The first data point is at the center of the first calibration region. The method may be implemented on at least one machine each of which has at least one processor and storage. The generated synthesizing filter may be stored in the storage in electronic form as a data file.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: June 1, 2021
    Assignee: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.
    Inventors: Yu Ding, Renjie He