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    RESISTIVE ELECTROMAGNET SYSTEMS AND METHODS
    3.
    发明申请
    RESISTIVE ELECTROMAGNET SYSTEMS AND METHODS 有权

    公开(公告)号：US20220113360A1

    公开(公告)日：2022-04-14

    申请号：US17559957

    申请日：2021-12-22

    Applicant: ViewRay Technologies, Inc.

    Inventor： James F. DEMPSEY ,  Massimo DAL FORNO ,  Shmaryu M. SHVARTSMAN ,  David L. RAYNER

    IPC: G01R33/381 ,  A61B5/055 ,  G01R33/38 ,  G01R33/34

    Abstract: A magnetic resonance imaging (MRI) system having a resistive, solenoidal electromagnet for whole-body MRI may include ferromagnetic material within an envelope of the electromagnet. The system can be configured to have a field strength of at least 0.05 Tesla and its main electromagnetic field can be generated by layers of conductors instead of bundles. Certain electromagnet designs may be fabricated using non-metallic formers, such as fiberglass, and can be constructed to form a rigid object with the layers of conductors by fixing all together with an epoxy. The electromagnet may be configured to have two separated halves, which may be held apart by a fixation structure such as carbon fiber. The power supply for certain electromagnets herein may have current fluctuations, at frequencies of 180 Hz or above, of at least one part per ten thousand without requiring an additional current filter.

    Radio frequency transmit coil for magnetic resonance imaging system
    5.
    发明授权
    Radio frequency transmit coil for magnetic resonance imaging system 有权

    公开(公告)号：US11035916B2

    公开(公告)日：2021-06-15

    申请号：US16509346

    申请日：2019-07-11

    Applicant: ViewRay Technologies, Inc.

    Inventor： James F. Dempsey ,  Thomas Chmielewski

    IPC: G01R33/34 ,  G01R33/48

    Abstract: A radio frequency coil is disclosed that is suitable for use with a magnetic resonance imaging apparatus. The radio frequency coil comprises first and second conductive loops connected electrically to each other by a plurality of conductive rungs. The conductive rungs each include a section that is relatively thin that will result in less attenuation to a radiation beam than other thicker sections of the rungs. Insulating regions are also disposed in areas of the radio frequency coil that are bound by adjacent rungs and the conductive loops. Portions of the insulating regions can be configured to provide a substantially similar amount of attenuation to the radiation beam as the relatively thin sections of the conductive rungs.

    Split magnetic resonance imaging system
    6.
    发明授权
    Split magnetic resonance imaging system 有权

    公开(公告)号：US10571536B2

    公开(公告)日：2020-02-25

    申请号：US15242452

    申请日：2016-08-19

    Applicant: ViewRay Technologies, Inc.

    Inventor： James F. Dempsey ,  John L. Patrick ,  Shmaryu M. Shvartsman ,  Gordon D. Demeester

    IPC: G01R33/38 ,  G01R33/48 ,  A61B5/055 ,  G01R33/385 ,  A61N5/10

    Abstract: A magnetic resonance imaging (MRI) system includes a split magnet system having a pair of MRI magnet housings separated by gap. A pair of main MRI magnets are disposed within respective MRI magnet housings. A plurality of buttress assemblies are attached to the MRI magnet housings. Some or all of the buttress assemblies are provided with removable connections to the MRI magnet housings. This allows for partial disassembly of the MRI system for improved transport and maneuverability for relocating the MRI system. The MRI system can include a gantry in the gap for supporting a radiation therapy system. Also, the removably buttress assemblies can be used for housing conduits, such as electrical and fluid conduits, between the pair of MRI magnet housings.

    PLANNING AND CONTROL FOR MAGNETIC RESONANCE GUIDED RADIATION THERAPY
    7.
    发明申请
    PLANNING AND CONTROL FOR MAGNETIC RESONANCE GUIDED RADIATION THERAPY 审中-公开

    公开(公告)号：US20190175943A1

    公开(公告)日：2019-06-13

    申请号：US16166572

    申请日：2018-10-22

    Applicant: ViewRay Technologies, Inc.

    Inventor： James F. DEMPSEY ,  Iwan KAWRYKOW

    IPC: A61N5/10

    Abstract: Magnetic resonance (MR) guided radiation therapy (MRgRT) enables control over the delivery of radiation based on patient motion indicated by MR imaging (MRI) images captured during radiation delivery. A method for MRgRT includes: simultaneously using one or more radiation therapy heads to deliver radiation and an MRI system to perform MRI; using a processor to determine whether one or more gates are triggered based on at least a portion of MRI images captured during the delivery of radiation; and in response to determining that one or more gates are triggered based on at least a portion of the MRI images captured during the delivery of radiation, suspending the delivery of radiation.

    Magnetic resonance imaging receive coil assembly
    9.
    发明授权
    Magnetic resonance imaging receive coil assembly 有权

    公开(公告)号：US11642040B2

    公开(公告)日：2023-05-09

    申请号：US17346062

    申请日：2021-06-11

    Applicant: ViewRay Technologies, Inc.

    Inventor： Thomas Chmielewski ,  James F. Dempsey

    IPC: A61B5/055 ,  A61N5/10 ,  G01R33/34 ,  G01R33/48 ,  G01R33/3415

    CPC classification number: A61B5/055 ,  A61N5/1049 ,  G01R33/34007 ,  G01R33/3415 ,  G01R33/4808 ,  A61N2005/1055

    Abstract: A radiofrequency receive coil assembly can include a first conductive loop and a second conductive loop electrically connected at a node. The first and second conductive loops can extend into a treatment beam region of the radio frequency receive coil assembly through which one or more beams of ionizing radiation pass. The first conductive loop and the second conductive loop can overlap each other to provide electromagnetic isolation and/or can use a common conductor combined with a shared capacitor to provide electromagnetic isolation, with the shared capacitor or other electrical components, as well as any conductive loop overlaps, being positioned outside of the treatment beam region. These features can, among other possible advantages, minimize and homogenize attenuation of the beams of ionizing radiation by the radiofrequency receive coil assembly.

    Planning and control for magnetic resonance guided radiation therapy
    10.
    发明授权
    Planning and control for magnetic resonance guided radiation therapy 有权

    公开(公告)号：US11628314B2

    公开(公告)日：2023-04-18

    申请号：US17143885

    申请日：2021-01-07

    Applicant: ViewRay Technologies, Inc.

    Inventor： James F. Dempsey ,  Iwan Kawrykow

    IPC: A61N5/10 ,  G01R33/48

    Abstract: Magnetic resonance (MR) guided radiation therapy (MRgRT) enables control over the delivery of radiation based on patient motion indicated by MR imaging (MRI) images captured during radiation delivery. A method for MRgRT includes: simultaneously using one or more radiation therapy heads to deliver radiation and an MRI system to perform MRI; using a processor to determine whether one or more gates are triggered based on at least a portion of MRI images captured during the delivery of radiation; and in response to determining that one or more gates are triggered based on at least a portion of the MRI images captured during the delivery of radiation, suspending the delivery of radiation.

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