公开(公告)号：US20190012814A1

公开(公告)日：2019-01-10

申请号：US16105848

申请日：2018-08-20

Applicant: ViewRay Technologies, Inc.

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

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

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.

公开(公告)号：US20170265290A1

公开(公告)日：2017-09-14

申请号：US15450666

申请日：2017-03-06

Applicant: ViewRay Technologies, Inc.

Inventor： SHMARYU M. SHVARTSMAN ,  James F. Dempsey

IPC: H05H7/04 ,  H05H7/14 ,  H05H9/00

CPC classification number: H05H7/04 ,  H01J41/12 ,  H05H7/14 ,  H05H9/00

Abstract: A system has a linear accelerator, ion pump and a compensating magnet. The ion pump includes an ion pump magnet position, an ion pump magnet shape, an ion pump magnet orientation, and an ion pump magnet magnetic field profile. The compensating magnet has a position, a shape, an orientation, and a magnetic field profile, where at least one of the position, shape, orientation, and magnetic field profile of the compensating magnet reduce at least one component of a magnetic field in the linear accelerator resulting from the ion pump magnet.

公开(公告)号：US20170052236A1

公开(公告)日：2017-02-23

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.

Abstract translation: 公开了适用于磁共振成像装置的射频线圈。 射频线圈包括通过多个导电梯级彼此电连接的第一和第二导电回路。 导电梯级各自包括相对较薄的部分，这将导致对辐射束的衰减比梯级的其它较厚部分更小的衰减。 绝缘区域也设置在由相邻梯级和导电环路束缚的射频线圈的区域中。 绝缘区域的一部分可以被配置为提供与导电梯级的相对薄的部分相当的辐射束的衰减量。

公开(公告)号：US20170014644A1

公开(公告)日：2017-01-19

申请号：US15242449

申请日：2016-08-19

Applicant: ViewRay Technologies, Inc.

Inventor： SHMARYU M. SHVARTSMAN ,  Gordon D. Demeester ,  James F. Dempsey ,  John Lester Patrick

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

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.

Abstract translation: 放射治疗系统包括与照射系统组合的磁共振成像（MRI）系统，其可以包括可以发射适合于放射治疗的各个辐射束的一个或多个线性加速器（直线加速器）。 MRI系统包括分裂磁体系统，包括由间隙分开的第一和第二主磁体。 龙门架位于主MRI磁体之间的间隙中，并支撑照射系统的直线加速器。 台架可以独立于MRI系统旋转，并且可以有角度地重新定位直线加速器。 屏蔽也可以以磁性和/或RF屏蔽的形式提供。 可以提供磁屏蔽来屏蔽直线加速器与MRI磁铁产生的磁场。 可以提供射频屏蔽来屏蔽MRI系统免受来自直线加速器的射频辐射。

公开(公告)号：US12000914B2

公开(公告)日：2024-06-04

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 ,  G01R33/34 ,  G01R33/38

CPC classification number: G01R33/381 ,  A61B5/055 ,  G01R33/34053 ,  G01R33/3802 ,  G01R33/3804 ,  G01R33/3806

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：US20230125842A1

公开(公告)日：2023-04-27

申请号：US17969544

申请日：2022-10-19

Applicant: ViewRay Technologies, Inc.

Inventor： James F. Dempsey ,  Iwan Kawrykow

IPC: A61N5/10 ,  A61B5/055 ,  G01R33/385 ,  G01R33/50

Abstract: Systems, methods, and computer software relating to gating using non-parallel imaging planes, determining accumulated dose to tissues during radiotherapy with actual beam delivery information, stopping/adjusting/reoptimizing therapy based on such accumulated doses and the generation and use of prognostic motion models and prognostic-motion adapted radiation treatment plans are disclosed.

公开(公告)号：US11612764B2

公开(公告)日：2023-03-28

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 ,  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：US20220305289A1

公开(公告)日：2022-09-29

申请号：US17832417

申请日：2022-06-03

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：US11452463B2

公开(公告)日：2022-09-27

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

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：US20220218223A1

公开(公告)日：2022-07-14

申请号：US17706458

申请日：2022-03-28

Applicant: ViewRay Technologies, Inc.

Inventor： Iwan Kawrykow ,  Georgi Gerganov ,  James F. Dempsey

IPC: A61B5/055 ,  G01R33/563 ,  G06T7/73 ,  A61B5/00 ,  G01R33/28

Abstract: Reference data relating to a portion of a patient anatomy during patient motion can be acquired from a magnetic resonance imaging system (MRI) to develop a patient motion library. During a time of interest, tracking data is acquired that can be related to the reference data. Partial volumetric data is acquired during the time of interest and at approximately the same time as the acquisition of the tracking data. A volumetric image of patient anatomy that represents a particular motion state can be constructed from the acquired partial volumetric data and acquired tracking data.