公开(公告)号：US11353535B2

公开(公告)日：2022-06-07

申请号：US15933288

申请日：2018-03-22

Applicant: ViewRay Technologies, Inc.

Inventor： Thomas Chmielewski ,  Shmaryu M. Shvartsman

IPC: G01R33/565 ,  G01R33/381 ,  G01R33/383

Abstract: Apparatuses, methods, and computer program products for reducing an appearance of an artifact in an image generated by a magnetic resonance imaging (MRI) system are disclosed. The apparatus includes a magnetic field generating device configured to create an inhomogeneity in the magnetic field of an MRI system and prevent at least one out-of-field excitation during imaging.

公开(公告)号：US11351398B2

公开(公告)日：2022-06-07

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.

公开(公告)号：US11224764B2

公开(公告)日：2022-01-18

申请号：US17085938

申请日：2020-10-30

Applicant: VIEWRAY TECHNOLOGIES, INC.

Inventor： Iwan Kawrykow ,  Eyad Kishawi

IPC: G01T1/185 ,  A61N5/10 ,  G01T1/29 ,  A61B5/055 ,  G01R33/38 ,  G01R33/48

Abstract: An ion chamber has a chamber having an interior volume. There is a first electrode and a second electrode in the chamber and separated by a gap. A collector electrode is positioned between the first electrode and the second electrode. The collector electrode is shaped to occlude a portion of the first electrode from the second electrode.

公开(公告)号：US11209509B2

公开(公告)日：2021-12-28

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 ,  G01R33/38 ,  G01R33/34 ,  A61B5/055

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：US20210361973A1

公开(公告)日：2021-11-25

申请号：US17397214

申请日：2021-08-09

Applicant: ViewRay Technologies, Inc.

Inventor： James F. Dempsey ,  Shmaryu M. Shvartsman

IPC: A61N5/10 ,  G01R33/422 ,  G01R33/48 ,  G01R33/36 ,  G01R33/421

Abstract: Systems and methods for the delivery of linear accelerator radiotherapy in conjunction with magnetic resonance imaging in which components of a linear accelerator may be placed in shielding containers around a gantry, may be connected with RF waveguides, and may employ various systems and methods for magnetic and radio frequency shielding.

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.

公开(公告)号：US11083912B2

公开(公告)日：2021-08-10

申请号：US16598564

申请日：2019-10-10

Applicant: ViewRay Technologies, Inc.

Inventor： James F. Dempsey ,  Shmaryu M. Shvartsman

IPC: A61N5/10 ,  G01R33/422 ,  G01R33/48 ,  G01R33/36 ,  G01R33/421 ,  G01R33/38

Abstract: Systems and methods for the delivery of linear accelerator radiotherapy in conjunction with magnetic resonance imaging in which components of a linear accelerator may be placed in shielding containers around a gantry, may be connected with RF waveguides, and may employ various systems and methods for magnetic and radio frequency shielding.

公开(公告)号：US10918887B2

公开(公告)日：2021-02-16

申请号：US16362094

申请日：2019-03-22

Applicant: ViewRay Technologies, Inc.

Inventor： Shmaryu M. Shvartsman ,  Gordon D. DeMeester ,  James F. Dempsey ,  John Lester Patrick

IPC: A61N5/10 ,  G01R33/38 ,  G01R33/421 ,  G01R33/48 ,  A61B5/055 ,  G01R33/28 ,  G01R33/42

Abstract: A radiation therapy system comprises a magnetic resonance imaging (MRI) system combined with an irradiation system, which can include one or more linear accelerators (linacs) that can emit respective radiation beams suitable for radiation therapy. The MRI system includes a split magnet system, comprising first and second main magnets separated by gap. A gantry is positioned in the gap between the main MRI magnets and supports the linac(s) of the irradiation system. The gantry is rotatable independently of the MRI system and can angularly reposition the linac(s). Shielding can also be provided in the form of magnetic and/or RF shielding. Magnetic shielding can be provided for shielding the linac(s) from the magnetic field generated by the MRI magnets. RF shielding can be provided for shielding the MRI system from RF radiation from the linac.

公开(公告)号：US10821304B2

公开(公告)日：2020-11-03

申请号：US16252305

申请日：2019-01-18

Applicant: ViewRay Technologies, Inc.

Inventor： Iwan Kawrykow ,  Eyad Kishawi

IPC: H01J49/14 ,  A61N5/10 ,  G01T1/185 ,  G01T1/29 ,  A61B5/055 ,  G01R33/38 ,  G01R33/48

Abstract: An ion chamber has a chamber having an interior volume. There is a first electrode and a second electrode in the chamber and separated by a gap. A collector electrode is positioned between the first electrode and the second electrode. The collector electrode is shaped to occlude a portion of the first electrode from the second electrode.

公开(公告)号：US20200258238A1

公开(公告)日：2020-08-13

申请号：US16865145

申请日：2020-05-01

Applicant: ViewRay Technologies, Inc.

Inventor： Georgi Gerganov ,  Iwan Kawrykow

IPC: G06T7/20 ,  G06T7/32 ,  G06T7/30

Abstract: A phase correlation method (PCM) can be used for translational and/or rotational alignment of 3D medical images even in the presence of non-rigid deformations between first and second images of a registered volume of a patient.