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.

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.

公开(公告)号：US20210096198A1

公开(公告)日：2021-04-01

申请号：US17086037

申请日：2020-10-30

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

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.

公开(公告)号：US20190219650A1

公开(公告)日：2019-07-18

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

CPC classification number: G01R33/3806 ,  A61N2005/1055 ,  G01R33/385 ,  G01R33/3856 ,  G01R33/3858 ,  G01R33/4215 ,  G01R33/4808

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.

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.

公开(公告)号：US20190168028A1

公开(公告)日：2019-06-06

申请号：US16204838

申请日：2018-11-29

Applicant: ViewRay Technologies, Inc.

Inventor： James F. DEMPSEY ,  Iwan KAWRYKOW

IPC: A61N5/10

Abstract: A photon therapy delivery system can deliver radiation therapy to a patient via a photon beam. The system can utilize a controller configured to facilitate delivery of radiation therapy via a photon beam and also a particle beam. This can include receiving radiation therapy beam information for radiation therapy treatment of a patient utilizing the particle beam and photon beam. Also, patient magnetic resonance imaging (MRI) data can be received during the radiation therapy treatment. Utilizing the patient MRI data, real-time calculations of a location of dose deposition for the particle beam and for the photon beam can be determined taking into account interaction properties of soft tissues through which the particle beam passes.