公开(公告)号：US11609288B2

公开(公告)日：2023-03-21

申请号：US17479068

申请日：2021-09-20

Applicant: Siemens Healthcare GmbH

Inventor： Ludwig Eberler ,  Markus Vester

IPC: G01R33/36 ,  G01R33/28

Abstract: A magnetic resonance apparatus including: a scanner; a patient receiving region which is at least partially surrounded by the scanner; and a lighting apparatus designed to light the patient receiving region. The lighting apparatus includes at least one lighting element; and two neutralizing elements designed to at least partially neutralize a voltage that is induced by a high-frequency field of the scanner.

公开(公告)号：US11579222B2

公开(公告)日：2023-02-14

申请号：US17532033

申请日：2021-11-22

Applicant: Siemens Healthcare GmbH

Inventor： Stephan Biber ,  Rainer Schneider ,  Stephan Kannengieβer ,  David Grodzki

IPC: G01R33/36 ,  G01R33/422 ,  G01R33/54 ,  G01R33/565

Abstract: To operate a magnetic resonance tomography system, first analysis signals are received by a main receive antenna and an auxiliary receive antenna. Based thereon, a first interference source and first weighting factors are determined. Second analysis signals are received by the main receive antenna and the auxiliary receive antenna and in accordance with the first weighting factors, a combination of the second analysis signals is created. Based thereon, a second interference source is determined. Second weighting factors are determined in order to suppress the influence of the first interference source and an influence of the second interference source. A magnetic resonance signal is received during an examination phase by the main receive antenna and an interference signal by the auxiliary receive antenna. An interference-suppressed magnetic resonance signal is created as a combination of the magnetic resonance signal and the interference signals depending on the second weighting factors.

公开(公告)号：US20230044269A1

公开(公告)日：2023-02-09

申请号：US17385662

申请日：2021-07-26

Applicant: Matthew Vreeland

Inventor： Matthew Vreeland

IPC: G01V3/14 ,  G01R33/36

Abstract: Systems and methods for locating a substance of interest below the Earth's surface are provided. One embodiment generates a downward directed magnetic pulse using a magnetic field pulse generator, wherein phonon energy is emitted by a plurality of nuclei in response to precession induced into the plurality of nuclei by the magnetic field pulse; detecting the phonon energy with at least one acoustic transducer; communicating a signal corresponding to the detected phonon energy from at least one acoustic transducer to a controller system; analyzing a frequency domain of the signal corresponding to the detected phonon energy at the controller system; comparing the analyzed frequency domain of the signal with the phonon response frequency for the plurality of different substances at the controller system; and identifying a substance when the compared analyzed frequency domain of the signal matches the phonon response frequency for one of the plurality of different substances.

公开(公告)号：US20230042439A1

公开(公告)日：2023-02-09

申请号：US17958171

申请日：2022-09-30

Applicant: Imam Abdulrahman Bin Faisal University

Inventor： Ashraf ABUELHAIJA ,  Gameel Saleh Mohammed SALEH

IPC: G01R33/36

Abstract: A magnetic resonance imaging apparatus includes a T/R switch. The T/R switch includes a double sided microstripline based hybrid couplers with a top side and a bottom side each including two concentric microstripline based hybrid couplers. Each of the two concentric microstripline based hybrid couplers includes an inner microstripline based hybrid coupler and an outer microstripline based hybrid coupler. The inner microstripline based hybrid coupler forms an inner loop of the two concentric microstripline based hybrid couplers and the outer microstripline based hybrid coupler forms an outer loop. In a transmission mode, the inner microstripline based hybrid coupler and the outer microstripline based hybrid coupler at the top side of the dual-tuned T/R switch are activated. In a receiving mode the inner microstripline based hybrid coupler and the outer microstripline based hybrid coupler at the top side and at the bottom side of the dual-tuned T/R switch are activated.

公开(公告)号：US20230042250A1

公开(公告)日：2023-02-09

申请号：US17958121

申请日：2022-09-30

Applicant: Imam Abdulrahman Bin Faisal University

Inventor： Ashraf ABUELHAIJA ,  Gameel Saleh Mohammed SALEH

IPC: G01R33/36

Abstract: A magnetic resonance imaging apparatus includes a T/R switch. The T/R switch includes a double sided microstripline based hybrid couplers with a top side and a bottom side each including two concentric microstripline based hybrid couplers. Each of the two concentric microstripline based hybrid couplers includes an inner microstripline based hybrid coupler and an outer microstripline based hybrid coupler. The inner microstripline based hybrid coupler forms an inner loop of the two concentric microstripline based hybrid couplers and the outer microstripline based hybrid coupler forms an outer loop. In a transmission mode, the inner microstripline based hybrid coupler and the outer microstripline based hybrid coupler at the top side of the dual-tuned T/R switch are activated. In a receiving mode the inner microstripline based hybrid coupler and the outer microstripline based hybrid coupler at the top side and at the bottom side of the dual-tuned T/R switch are activated.

公开(公告)号：US11573282B2

公开(公告)日：2023-02-07

申请号：US17078729

申请日：2020-10-23

Applicant: Hyperfine Operations, Inc.

Inventor： Carole Lazarus

IPC: G01V3/00 ,  G01R33/565 ,  G01R33/56 ,  G01R33/561 ,  G06T11/00 ,  G01R33/36 ,  G01R33/48

Abstract: Techniques for compensating magnetic resonance imaging (MRI) data for artefacts caused by motion of a subject being imaged. The techniques include obtaining spatial frequency data obtained by using a magnetic resonance imaging (MRI) system to perform MRI on a patient, the spatial frequency data including first spatial frequency data and second spatial frequency data; determining a transformation using a first image obtained using the first spatial frequency data and a second image obtained using the second spatial frequency data; determining a residual spatial phase; correcting, using the transformation, second spatial frequency data and the residual spatial phase, to obtain corrected second spatial frequency data and a corrected residual spatial phase; and generating a magnetic resonance (MR) image using the corrected second spatial frequency data and the corrected residual spatial phase.

公开(公告)号：US11561271B2

公开(公告)日：2023-01-24

申请号：US17200795

申请日：2021-03-13

Applicant: 10250929 Canada Inc.

Inventor： David O'Brien

IPC: G01R33/465 ,  A61B5/055 ,  A61B5/00 ,  G01R33/30 ,  G01R33/36 ,  A61B5/145 ,  G01N33/49 ,  G01R33/3875 ,  G01N24/08 ,  G01R33/383 ,  H01F1/057 ,  H01F7/02

Abstract: Embodiments of a compact portable nuclear magnetic resonance (NMR) device are described which generally include a housing that provides a magnetic shield; an axisymmetric permanent magnet assembly in the housing and having a bore, a plurality of magnetic elements that together provide a well confined axisymmetric magnetization for generating a near-homogenous magnetic dipole field B0 directed along a longitudinal axis and providing a sample cavity for receiving a sample, and high magnetic permeability soft steel poles to improve field uniformity: a shimming assembly with coils disposed at the longitudinal axis for spatially correcting the near homogenous magnetic field B0; and a spectrometer having a control unit for measuring a metabolite in the sample by applying magnetic stimulus pulses to the sample, measuring free induction delay signals generated by an ensemble of hydrogen protons within the sample; and suppressing a water signal by using a dephasing gradient with frequency selective suppression.

公开(公告)号：US20230015849A1

公开(公告)日：2023-01-19

申请号：US17812717

申请日：2022-07-14

Applicant: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.

Inventor： Peng ZHANG ,  Hui ZHU ,  Jifeng CHEN ,  Xu CHU ,  Bin CAO ,  Yinqi WANG

IPC: G01R33/36

Abstract: Systems and methods for improving output stability of an RFPA. The systems may obtain an initial radio frequency signal to be amplified by the RFPA. The systems may also generate a compensated radio frequency signal by performing, based on a preset compensation rule and a set of compensation parameters, a gain compensation operation for the initial radio frequency signal. The set of compensation parameters may include a supply voltage of the RFPA and a transistor junction temperature of the RFPA. The systems may further generate, by performing a non-linear correction operation on the compensated radio frequency signal, a corrected radio frequency signal, which is transmitted to the RFPA.

公开(公告)号：US11555875B2

公开(公告)日：2023-01-17

申请号：US17211534

申请日：2021-03-24

Applicant: Coilone, LLC

Inventor： Li Zeng ,  David Zheng

IPC: G01R33/36 ,  H05K1/16 ,  H03H7/42

Abstract: An apparatus and method for receiving a magnetic resonance (MR) signal for imaging a patient. The MR signal includes a MR frequency. A radio frequency (RF) coil has first and second end portions. An impedance converter is in electrical communication with the RF coil. A preamplifier in electrical communication with the impedance converter, the preamplifier having a gain. At least one resonant circuit electrically connected to at least one end portion of the RF coil.

公开(公告)号：US11543479B2

公开(公告)日：2023-01-03

申请号：US17185327

申请日：2021-02-25

Applicant: Tesla Dynamic Coils BV ,  Futura Composites B.V. ,  UMC Utrecht Holding B.V.

Inventor： Dennis Klomp ,  Edwin Versteeg ,  Jeroen Siero ,  Martino Borgo

IPC: G01R33/561 ,  G01R33/36 ,  G01R33/385

Abstract: An MRI system coil insert 2 for use within a bore B of a main MRI system 1, the coil insert 2 comprising at least one gradient coil, for creating a spatially varying magnetic field along a respective axis and being arranged to be electrically driven at an ultrasonic frequency.