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    RF COIL ASSEMBLIES
    11.
    发明申请
    RF COIL ASSEMBLIES 有权

    公开(公告)号：US20230041633A1

    公开(公告)日：2023-02-09

    申请号：US17880326

    申请日：2022-08-03

    Applicant: ViewRay Technologies, Inc.

    Inventor： Thomas Chmielewski ,  Steven Koenig

    IPC: G01R33/34 ,  G01R33/3415

    Abstract: RF coil assemblies are disclosed that include multiturn loops formed of conductors configured to receive RF signals from a patient during MRI. The multiturn loops include an inner loop and an outer loop that both lie substantially in a plane of the RF coil assembly. The inner loop is at least partially nested within the outer loop.

    Radiation therapy systems and methods
    14.
    发明授权
    Radiation therapy systems and methods 有权

    公开(公告)号：US11000706B2

    公开(公告)日：2021-05-11

    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 ,  A61B6/04 ,  G21K1/04 ,  A61B6/03 ,  A61B6/00 ,  A61B6/06

    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.

    Self-shielded split gradient coil
    15.
    发明授权
    Self-shielded split gradient coil 有权

    公开(公告)号：US10823794B2

    公开(公告)日：2020-11-03

    申请号：US16195673

    申请日：2018-11-19

    Applicant: ViewRay Technologies, Inc.

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

    IPC: G01R33/38 ,  G01R33/385 ,  G01R33/48 ,  G01R33/421 ,  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.

    RESISTIVE ELECTROMAGNET SYSTEMS AND METHODS
    17.
    发明申请
    RESISTIVE ELECTROMAGNET SYSTEMS AND METHODS 审中-公开

    公开(公告)号：US20190353725A1

    公开(公告)日：2019-11-21

    申请号：US16179764

    申请日：2018-11-02

    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
    18.
    发明授权
    Radio frequency transmit coil for magnetic resonance imaging system 有权

    公开(公告)号：US10466319B2

    公开(公告)日：2019-11-05

    申请号：US15224264

    申请日：2016-07-29

    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.

    RADIO FREQUENCY TRANSMIT COIL FOR MAGNETIC RESONANCE IMAGING SYSTEM
    20.
    发明申请
    RADIO FREQUENCY TRANSMIT COIL FOR MAGNETIC RESONANCE IMAGING SYSTEM 审中-公开

    公开(公告)号：US20190331746A1

    公开(公告)日：2019-10-31

    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.

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