公开(公告)号：US09599687B2

公开(公告)日：2017-03-21

申请号：US14658079

申请日：2015-03-13

Applicant: ViewRay Incorporated

Inventor： Shmaryu M. Shvartsman ,  James F. Dempsey

IPC: G01V3/00 ,  G01R33/36 ,  G01R33/3875 ,  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：US09423477B2

公开(公告)日：2016-08-23

申请号：US14452416

申请日：2014-08-05

Applicant: ViewRay Incorporated

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

IPC: G01R33/38 ,  G01R33/385 ,  A61B5/055 ,  G01R33/48 ,  A61N5/10

CPC classification number: G01R33/3806 ,  A61B5/055 ,  A61N2005/1055 ,  G01R33/3802 ,  G01R33/3856 ,  G01R33/4808

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。

公开(公告)号：US20140347053A1

公开(公告)日：2014-11-27

申请号：US14452416

申请日：2014-08-05

Applicant: ViewRay Incorporated

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

IPC: G01R33/38 ,  G01R33/385 ,  A61B5/055 ,  G01R33/48

CPC classification number: G01R33/3806 ,  A61B5/055 ,  A61N2005/1055 ,  G01R33/3802 ,  G01R33/3856 ,  G01R33/4808

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。

公开(公告)号：US20140275696A1

公开(公告)日：2014-09-18

申请号：US13830794

申请日：2013-03-14

Applicant: VIEWRAY, INCORPORATED

Inventor： James F. Dempsey ,  Iwan Kawrykow

IPC: A61N5/10

CPC classification number: A61N5/1031 ,  A61N5/1036 ,  A61N5/1045 ,  A61N5/1071 ,  A61N5/1077

Abstract: The subject matter described herein provides methods for developing an IMRT treatment plan for a radiotherapy system. In one aspect, the method can include providing initial treatment parameters. These parameters can include a number of isotopic beams, a transmission angle for each beam, a prescribed dose for a target, and dose volume histogram constraints. The method can further include determining an initial fluence map including one or more beamlets. The initial fluence map can specify a fluence value for each beamlet. The method can further include determining a delivery sequence for the fluence values in the initial fluence map. The delivery sequence can include one or more apertures formed by the leaves of a collimator. These apertures can have a specified size constrained to substantially less than a maximum size associated with the collimator, when the isotopic beam is near a critical structure. Related apparatus and systems are also described.

Abstract translation: 本文所述的主题提供了用于开发用于放射治疗系统的IMRT治疗计划的方法。 在一个方面，该方法可以包括提供初始治疗参数。 这些参数可以包括多个同位素束，每个束的传播角，目标的规定剂量以及剂量体积直方图约束。 该方法还可以包括确定包括一个或多个子束的初始注量图。 初始注量图可以为每个子束指定注量值。 该方法还可以包括确定初始注量图中的能量密度值的递送序列。 递送顺序可以包括由准直器的叶形成的一个或多个孔。 当同位素束接近临界结构时，这些孔可以具有被限制为基本上小于与准直器相关联的最大尺寸的规定尺寸。 还描述了相关装置和系统。