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.

公开(公告)号：US20170176556A1

公开(公告)日：2017-06-22

申请号：US15449774

申请日：2017-03-03

Applicant: ViewRay Technologies, Inc.

Inventor： Shmaryu M. Shvartsman ,  James F. Dempsey

IPC: G01R33/3875 ,  G01R33/385 ,  G01R33/48 ,  G01R33/38

CPC classification number: G01R33/3875 ,  G01R33/3642 ,  G01R33/3806 ,  G01R33/385 ,  G01R33/4808 ,  G01R33/481 ,  G01R33/4812 ,  G01R33/4814

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.

公开(公告)号：US20230017149A1

公开(公告)日：2023-01-19

申请号：US17948428

申请日：2022-09-20

Applicant: ViewRay Technologies, Inc.

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

IPC: A61B5/055 ,  G01R33/38 ,  G01R33/421 ,  G01R33/48 ,  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 MM magnets. RF shielding can be provided for shielding the MRI system from RF radiation from the linac.

公开(公告)号：US20210162236A1

公开(公告)日：2021-06-03

申请号：US17174116

申请日：2021-02-11

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 ,  G01R33/28 ,  G01R33/42 ,  A61B5/055

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：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.

公开(公告)号：US20200038688A1

公开(公告)日：2020-02-06

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

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：US10463884B2

公开(公告)日：2019-11-05

申请号：US15268366

申请日：2016-09-16

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：US20170281043A1

公开(公告)日：2017-10-05

申请号：US15620800

申请日：2017-06-12

Applicant: ViewRay Technologies, Inc.

Inventor： Shmaryu M. Shvartsman ,  James F. Dempsey ,  David Nicolay

IPC: A61B5/055 ,  A61N5/10

CPC classification number: A61B5/055 ,  A61N5/1045 ,  A61N5/1049 ,  A61N2005/1055 ,  A61N2005/1094 ,  G01R33/3873 ,  G01R33/4808

Abstract: Systems and methods for delivery of radiotherapy in conjunction with magnetic resonance imaging in which various conductors, shields and shims may be used to solve issues occurring when radiation therapy equipment is placed in the vicinity of an magnetic resonance imaging system.

公开(公告)号：US20170032544A1

公开(公告)日：2017-02-02

申请号：US15294533

申请日：2016-10-14

Applicant: ViewRay Technologies, Inc.

Inventor： James F. Dempsey ,  Qingguo Zeng ,  Roger Nana ,  John Lester Patrick ,  Timothy P. Eagan ,  Shmaryu M. Shvartsman

IPC: G06T11/00 ,  G01R33/561 ,  G01R33/56 ,  G06T7/00 ,  G01R33/48

CPC classification number: G06T11/006 ,  G01R33/4826 ,  G01R33/5608 ,  G01R33/5611 ,  G06T7/0012 ,  G06T2211/424

Abstract: Systems and methods for tomographic reconstruction of an image include systems and methods for producing images from k-space data. A k-space data set of an imaged object is acquired using know k-space data acquisition systems and methods. A portion of the k-space data set is sampled so as to collect some portion of the k-space data. An image is then reconstructed from the collected portion of the k-space data set according to a convex optimization model.

Abstract translation: 用于图像的层析重建的系统和方法包括用于从k空间数据产生图像的系统和方法。 使用已知的k空间数据采集系统和方法获取成像对象的k空间数据集。 对k空间数据集的一部分进行采样，以收集k空间数据的一部分。 然后根据凸优化模型从k空间数据集的收集部分重建图像。

公开(公告)号：US20160356869A1

公开(公告)日：2016-12-08

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

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.

Abstract translation: 磁共振成像（MRI）系统包括具有由间隙隔开的一对MRI磁体壳体的分裂磁体系统。 一对主磁共振磁铁磁铁设置在相应的磁共振磁体外壳内。 多个支撑组件附接到MRI磁体壳体。 部分或全部支撑组件设置有与磁共振磁体外壳的可拆卸连接。 这允许MRI系统的部分拆卸以改善用于重新定位MRI系统的运输和机动性。 MRI系统可以包括用于支撑放射治疗系统的间隙中的台架。 此外，可移除的支撑组件可以用于在一对MRI磁体壳体之间的壳体导管，例如电气和流体导管。