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    RADIO FREQUENCY TRANSMIT COIL FOR MAGNETIC RESONANCE IMAGING SYSTEM
    61.
    发明申请
    RADIO FREQUENCY TRANSMIT COIL FOR MAGNETIC RESONANCE IMAGING SYSTEM 有权

    公开(公告)号：US20210356539A1

    公开(公告)日：2021-11-18

    申请号：US17344825

    申请日：2021-06-10

    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.

    PARTICLE THERAPY WITH MAGNETIC RESONANCE IMAGING
    64.
    发明申请
    PARTICLE THERAPY WITH MAGNETIC RESONANCE IMAGING 审中-公开

    公开(公告)号：US20200001115A1

    公开(公告)日：2020-01-02

    申请号：US16570810

    申请日：2019-09-13

    Applicant: ViewRay Technologies, Inc.

    Inventor： James F. Dempsey ,  Shmaryu M. Shvartsman ,  Iwan Kawrykow

    IPC: A61N5/10

    Abstract: Particle radiation therapy and planning utilizing magnetic resonance imaging (MRI) data. Radiation therapy prescription information and patient MRI data can be received and a radiation therapy treatment plan can be determined for use with a particle beam. The treatment plan can utilize the radiation therapy prescription information and the patient MRI data to account for interaction properties of soft tissues in the patient through which the particle beam passes. Patient MRI data may be received from a magnetic resonance imaging system integrated with the particle radiation therapy system. MRI data acquired during treatment may also be utilized to modify or optimize the particle radiation therapy treatment.

    Active resistive shimming for MRI devices
    65.
    发明授权
    Active resistive shimming for MRI devices 有权

    公开(公告)号：US10393836B2

    公开(公告)日：2019-08-27

    申请号：US15449774

    申请日：2017-03-03

    Applicant: ViewRay Technologies, Inc.

    Inventor： Shmaryu M. Shvartsman ,  James F. Dempsey

    IPC: G01V3/00 ,  G01R33/3875 ,  G01R33/48 ,  G01R33/38 ,  G01R33/36 ,  G01R33/385

    Abstract: Active resistive shim coil assemblies may be used in magnetic resonance imaging (MRI) systems to reduce in-homogeneity of the magnetic field in the imaging volume. Disclosed embodiments may be used with continuous systems, gapped cylindrical systems, or vertically gapped systems. Disclosed embodiments may also be used with an open MRI system and can be used with an instrument placed in the gap of the MRI system. An exemplary embodiment of the active resistive shim coil assembly of the present disclosure includes active resistive shim coils each operable to be energized by separate currents through a plurality of power channels. In some embodiments, the disclosed active resistive shim coil assemblies allow for various degrees of freedom to shim out field in-homogeneity.

    Self-shielded split gradient coil
    67.
    发明授权
    Self-shielded split gradient coil 有权

    公开(公告)号：US10132888B2

    公开(公告)日：2018-11-20

    申请号：US14550464

    申请日：2014-11-21

    Applicant: VIEWRAY TECHNOLOGIES, INC.

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

    IPC: G01R33/38 ,  G01R33/385 ,  G01R33/421 ,  G01R33/48 ,  A61N5/10

    Abstract: Gradient coil assemblies for horizontal magnetic resonance imaging systems (MRIs) and methods of their manufacture. Some embodiments may be used with open MRIs and can be used with an instrument placed in the gap of the MRI. In general, concentrations of conductors or radially oriented conductors may be moved away from the gap of the MRI so as to reduce eddy currents that may be induced in any instrument placed within the gap. Systems for directly cooling primary gradient and shield coils may be utilized and various coil supporting structures may be used to assist in coil alignment or to facilitate use of an instrument in the MRI gap.

    RADIATION THERAPY SYSTEMS AND METHODS
    69.
    发明申请
    RADIATION THERAPY SYSTEMS AND METHODS 审中-公开

    公开(公告)号：US20180161602A1

    公开(公告)日：2018-06-14

    申请号：US15840941

    申请日：2017-12-13

    Applicant: ViewRay Technologies, Inc.

    Inventor： Iwan Kawrykow ,  Thomas Chmielewski ,  James F. Dempsey

    IPC: A61N5/10

    Abstract: A system including a diagnostic-quality CT scanner for imaging a patient, the diagnostic-quality CT scanner having an imaging isocenter and a radiation therapy device positioned adjacent the diagnostic-quality CT scanner, the radiation therapy device including a gantry carrying a radiation therapy beam source and having a radiation therapy isocenter separate from the imaging isocenter of the diagnostic-quality CT scanner. The system including a couch configured to position the patient for imaging and for radiation therapy by translating the patient between the diagnostic quality CT scanner and the radiation therapy device.

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