知搜-全球专利检索

  1. Login
  2. Sign Up

Search Results

16 records (took 0.031 seconds)

    Method of calibration of a stereoscopic camera system for use with a radio therapy treatment apparatus
    2.
    发明授权
    Method of calibration of a stereoscopic camera system for use with a radio therapy treatment apparatus 有权

    公开(公告)号：US11633629B2

    公开(公告)日：2023-04-25

    申请号：US17159845

    申请日：2021-01-27

    Applicant: Vision RT Limited

    Inventor： Ivan Meir ,  Martin Allen ,  Gideon Hale ,  Norman Smith ,  Robert Howe

    IPC: A61N5/10 ,  G06T7/00 ,  A61B6/00 ,  G06T7/80

    Abstract: The disclosed calibration method includes a calibration phantom positioned on an adjustable table on the surface of a mechanical couch, with the phantom's centre at an estimated location for the iso-centre of a radio therapy treatment apparatus. The calibration phantom is then irradiated using the apparatus, and the relative location of the center of the calibration phantom and the iso-centre of the apparatus is determined by analyzing images of the irradiation of the calibration phantom. The calibration phantom is then repositioned by the mechanical couch applying an offset corresponding to the determined relative location of the centre of the calibration phantom and the iso-centre of the apparatus to the calibration phantom. Images of the relocated calibration phantom are obtained, to which the offset has been applied, and the obtained images are processed to set the co-ordinate system of a stereoscopic camera system relative to the iso-centre of the apparatus.

    Method of calibrating a patient monitoring system for use with a radiotherapy treatment apparatus
    5.
    发明授权
    Method of calibrating a patient monitoring system for use with a radiotherapy treatment apparatus 有权

    公开(公告)号：US10861193B2

    公开(公告)日：2020-12-08

    申请号：US15516628

    申请日：2015-09-29

    Applicant: VISION RT LIMITED

    Inventor： Edward Mead ,  Ivan Meir

    IPC: G06T7/80 ,  A61N5/10 ,  G06T7/70 ,  G06K9/32 ,  G06T5/00 ,  G06T5/50 ,  G06T17/20 ,  H04N13/243

    Abstract: A calibration sheet is located at a first position where its surface substantially corresponds to the expected position of a patient surface lying on a mechanical couch during treatment. Images of the calibration sheet are obtained and processed to ascertain relative locations and orientations of the image detectors obtaining the images and optical distortion parameters indicative of optical distortions present in the obtained images of the calibration sheet. The calibration sheet is then re-located to a known position relative to the iso-centre of the treatment apparatus and images of the re-located calibration sheet are obtained and processed to determine a transform corresponding to the relocation of the calibration sheet from the first position to the iso-centre of the treatment apparatus. Data indicative of optical distortions present in the images and data indicative of the locations and orientations of the image detectors relative to the iso-centre of the treatment apparatus are stored.

    Patient monitor and method
    6.
    发明授权
    Patient monitor and method 有权
    患者监护仪和方法

    公开(公告)号：US09420254B2

    公开(公告)日：2016-08-16

    申请号：US14394704

    申请日：2013-04-17

    Applicant: VISION RT LIMITED

    Inventor： Ivan Meir

    IPC: H04N13/00 ,  G06T7/00

    CPC classification number: H04N13/111 ,  G06T7/75 ,  G06T2207/10028 ,  G06T2207/10072 ,  G06T2207/30196 ,  G06T2219/2004 ,  H04N2013/0085

    Abstract: A patient monitoring system can include stereoscopic cameras connected to a computer which includes a 3D position determination module operable to process stereoscopic images of a patient to identify 3D positions of a plurality of points on the surface of an imaged patient. A target model store can store a target model including data identifying 3D positions of a set of vertices of a triangulated 3D wire mesh model and connectivity indicative of connections between vertices. A matching module can identify the triangles in a target model surface stored in the target model store closest to points identified by the 3D position determination module and calculate a rigid transformation which minimizes point to plane distances between the identified points and the planes containing the triangles of the target model surface identified as being closest to those points.

    Abstract translation: 患者监视系统可以包括连接到计算机的立体摄像机，其包括3D位置确定模块，其可操作以处理患者的立体图像，以识别成像患者的表面上的多个点的3D位置。 目标模型存储可以存储目标模型，其包括识别三角形3D网格模型的一组顶点的3D位置的数据和指示顶点之间的连接的连接。 匹配模块可以识别存储在最靠近由3D位置确定模块识别的点的目标模型库中的目标模型表面中的三角形，并且计算使所识别的点与包含三角形的三角形的平面之间的点到平面距离最小化的刚性变换 目标模型表面被识别为最接近这些点。

    Method of calibration of a stereoscopic camera system for use with a radio therapy treatment apparatus
    8.
    发明授权
    Method of calibration of a stereoscopic camera system for use with a radio therapy treatment apparatus 有权

    公开(公告)号：US10456601B2

    公开(公告)日：2019-10-29

    申请号：US15946362

    申请日：2018-04-05

    Applicant: Vision RT Limited

    Inventor： Ivan Meir ,  Martin Allen ,  Gideon Hale ,  Norman Smith ,  Robert Howe

    IPC: G06T7/00 ,  A61N5/10 ,  A61B6/00 ,  G06T7/80

    Abstract: The disclosed calibration method includes a calibration phantom positioned on an adjustable table on the surface of a mechanical couch, with the phantom's center at an estimated location for the iso-center of a radio therapy treatment apparatus. The calibration phantom is then irradiated using the apparatus, and the relative location of the center of the calibration phantom and the iso-center of the apparatus is determined by analyzing images of the irradiation of the calibration phantom. The calibration phantom is then repositioned by the mechanical couch applying an offset corresponding to the determined relative location of the center of the calibration phantom and the iso-center of the apparatus to the calibration phantom. Images of the relocated calibration phantom are obtained, to which the offset has been applied, and the obtained images are processed to set the co-ordinate system of a stereoscopic camera system relative to the iso-center of the apparatus.

    PATIENT MONITOR AND METHOD
    9.
    发明申请
    PATIENT MONITOR AND METHOD 有权
    患者监护仪及方法

    公开(公告)号：US20150071527A1

    公开(公告)日：2015-03-12

    申请号：US14394704

    申请日：2013-04-17

    Applicant: VISION RT LIMITED

    Inventor： Ivan Meir

    IPC: H04N13/00

    CPC classification number: H04N13/111 ,  G06T7/75 ,  G06T2207/10028 ,  G06T2207/10072 ,  G06T2207/30196 ,  G06T2219/2004 ,  H04N2013/0085

    Abstract: A patient monitoring system can include stereoscopic cameras connected to a computer which includes a 3D position determination module operable to process stereoscopic images of a patient to identify 3D positions of a plurality of points on the surface of an imaged patient. A target model store can store a target model including data identifying 3D positions of a set of vertices of a triangulated 3D wire mesh model and connectivity indicative of connections between vertices. A matching module can identify the triangles in a target model surface stored in the target model store closest to points identified by the 3D position determination module and calculate a rigid transformation which minimizes point to plane distances between the identified points and the planes containing the triangles of the target model surface identified as being closest to those points.

    Abstract translation: 患者监视系统可以包括连接到计算机的立体摄像机，其包括3D位置确定模块，其可操作以处理患者的立体图像，以识别成像患者的表面上的多个点的3D位置。 目标模型存储可以存储目标模型，其包括识别三角形3D网格模型的一组顶点的3D位置的数据和指示顶点之间的连接的连接。 匹配模块可以识别存储在最靠近由3D位置确定模块识别的点的目标模型库中的目标模型表面中的三角形，并且计算使所识别的点与包含三角形的三角形的平面之间的点到平面距离最小化的刚性变换 目标模型表面被识别为最接近这些点。

Patent Agency Ranking