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    Radio frequency coil tuning methods and apparatus
    71.
    发明授权
    Radio frequency coil tuning methods and apparatus 有权

    公开(公告)号：US10996296B2

    公开(公告)日：2021-05-04

    申请号：US16735126

    申请日：2020-01-06

    Applicant: Hyperfine Research, Inc.

    Inventor： Todd Rearick ,  Jeremy Christopher Jordan ,  Gregory L. Charvat ,  Matthew Scot Rosen

    IPC: G01R33/36 ,  G01R33/44

    Abstract: Some aspects comprise a tuning system configured to tune a radio frequency coil for use with a magnetic resonance imaging system comprising a tuning circuit including at least one tuning element configured to affect a frequency at which the radio frequency coil resonates, and a controller configured to set at least one value for the tuning element to cause the radio frequency coil to resonate at approximately a Larmor frequency of the magnetic resonance imaging system determined by the tuning system. Some aspects include a method of automatically tuning a radio frequency coil comprising determining information indicative of a Larmor frequency of the magnetic resonance imaging system, using a controller to automatically set at least one value of a tuning circuit to cause the radio frequency coil to resonate at approximately the Larmor frequency based on the determined information.

    Radio-frequency coil signal chain for a low-field MRI system
    72.
    发明授权
    Radio-frequency coil signal chain for a low-field MRI system 有权

    公开(公告)号：US10890634B2

    公开(公告)日：2021-01-12

    申请号：US16418379

    申请日：2019-05-21

    Applicant: Hyperfine Research, Inc.

    Inventor： Hadrien A. Dyvorne ,  Todd Rearick

    IPC: G01R33/34 ,  G01R33/44 ,  G01R33/36 ,  G01R33/00 ,  G01R33/385 ,  G01R33/565

    Abstract: Methods and apparatus for reducing noise in RF signal chain circuitry for a low-field magnetic resonance imaging system are provided. A switching circuit in the RF signal chain circuitry may include at least one field effect transistor (FET) configured to operate as an RF switch at an operating frequency of less than 10 MHz. A decoupling circuit may include tuning circuitry coupled across inputs of an amplifier and active feedback circuitry coupled between an output of the amplifier and an input of the amplifier, wherein the active feedback circuitry includes a feedback capacitor configured to reduce a quality factor of an RF coil coupled to the amplifier.

    RADIO FREQUENCY COIL METHODS AND APPARATUS
    73.
    发明申请
    RADIO FREQUENCY COIL METHODS AND APPARATUS 审中-公开

    公开(公告)号：US20200337644A1

    公开(公告)日：2020-10-29

    申请号：US16926272

    申请日：2020-07-10

    Applicant: Hyperfine Research, Inc.

    Inventor： Michael Stephen Poole ,  Gregory L. Charvat ,  Todd Rearick ,  Jonathan M. Rothberg

    IPC: A61B5/00 ,  A61B5/055 ,  G01R33/34 ,  G01R33/36

    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.

    RADIO-FREQUENCY COIL SIGNAL CHAIN FOR A LOW-FIELD MRI SYSTEM
    77.
    发明申请
    RADIO-FREQUENCY COIL SIGNAL CHAIN FOR A LOW-FIELD MRI SYSTEM 审中-公开

    公开(公告)号：US20190353727A1

    公开(公告)日：2019-11-21

    申请号：US16418397

    申请日：2019-05-21

    Applicant: Hyperfine Research, Inc.

    Inventor： Hadrien A. Dyvorne ,  Todd Rearick

    IPC: G01R33/385 ,  G01R33/00 ,  G01R33/565

    Abstract: Methods and apparatus for reducing noise in RF signal chain circuitry for a low-field magnetic resonance imaging system are provided. A switching circuit in the RF signal chain circuitry may include at least one field effect transistor (FET) configured to operate as an RF switch at an operating frequency of less than 10 MHz. A decoupling circuit may include tuning circuitry coupled across inputs of an amplifier and active feedback circuitry coupled between an output of the amplifier and an input of the amplifier, wherein the active feedback circuitry includes a feedback capacitor configured to reduce a quality factor of an RF coil coupled to the amplifier.

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