公开(公告)号：WO2016200462A1

公开(公告)日：2016-12-15

申请号：PCT/US2016/023450

申请日：2016-03-21

Applicant: ACCURAY INCORPORATED

Inventor： CHAPPELOW, Jonathan ,  JORDAN, Petr ,  GAO, Jian ,  SINGH, Sarbjit ,  LAING, Trevor ,  MAURER, Calvin

IPC: G21K1/04

CPC classification number: H04N9/646 ,  A61B6/022 ,  A61B6/032 ,  A61B6/50 ,  A61N5/1045 ,  G06T5/002 ,  G06T5/007 ,  G06T5/30 ,  G06T7/13 ,  G06T7/70 ,  G06T7/90 ,  G21K1/046 ,  H04N5/2254 ,  H04N9/735

Abstract: A method (400) of ambient light suppression in an imaging system, including illuminating leaves of a multi-leaf collimator (MLC) with a first light of a lighting system inside a housing of the MCL, receiving ambient light inside the housing of the MLC through an aperture of the MLC, and capturing (410), using an imaging system having optics situated inside the housing of the MLC, an image of the leaves of the MLC illuminated with the first light and the ambient light. The method may further include, suppressing the ambient light in the first image to generate a second image of the leaves of the MLC and detecting a feature of the leaves of the MLC in the second image.

Abstract translation: 一种在成像系统中的环境光抑制的方法（400），包括利用MCL的壳体内的照明系统的第一光照亮多叶准直器（MLC）的叶子，接收MLC的壳体内的环境光 通过MLC的孔径和使用位于MLC的壳体内部的具有光学器件的成像系统捕获（410），用第一光和环境光照亮的MLC的叶片的图像。 该方法还可以包括：抑制第一图像中的环境光以产生MLC的叶子的第二图像，并且检测第二图像中MLC的叶子的特征。

公开(公告)号：WO2016200464A1

公开(公告)日：2016-12-15

申请号：PCT/US2016/023463

申请日：2016-03-21

Applicant: ACCURAY INCORPORATED

Inventor： CHAPPELOW, Jonathan Cecil ,  JORDAN, Petr ,  MAURER, Calvin ,  SINGH, Sarbjit ,  FITTING, Andrew W. ,  MYRONENKO, Andriy ,  GAO, Jian

IPC: A61N5/10 ,  G21K1/04

CPC classification number: A61N5/1048 ,  A61N5/1045 ,  A61N5/1067 ,  G06K9/6211 ,  G06T5/006 ,  G06T7/74 ,  G06T2207/20048 ,  G06T2207/30164 ,  G21K1/046 ,  H04N5/2252 ,  H04N5/2257

Abstract: A radiation delivery system includes a multi-leaf collimator (MLC) that includes a housing, a plurality of leaves disposed within the housing, and an image sensor disposed within the housing at a position that is offset from a beam axis. The plurality of leaves are movable to define an aperture for the MLC, and the image sensor is directed toward the plurality of leaves. The image sensor is to generate an oblique-view image of the aperture. The radiation delivery system additionally includes a processing device to receive the oblique-view image, transform the oblique-view image into a top-view image having a reference coordinate space, and determine whether the aperture for the MLC corresponds to a specified aperture based on the top-view image.

Abstract translation: 辐射传送系统包括多叶准直器（MLC），其包括壳体，设置在壳体内的多个叶片，以及设置在壳体内的偏离光束轴线的位置处的图像传感器。 多个叶片可移动以限定MLC的孔，并且图像传感器指向多个叶片。 图像传感器用于产生光圈的斜视图像。 放射线传送系统还包括接收斜视图像的处理装置，将斜视图像变换为具有参考坐标空间的顶视图像，并且基于以下方式确定MLC的孔径是否对应于指定的孔径 顶视图。

公开(公告)号：WO2016200463A1

公开(公告)日：2016-12-15

申请号：PCT/US2016/023456

申请日：2016-03-21

Applicant: ACCURAY INCORPORATED

Inventor： CHAPPELOW, Jonathan Cecil ,  JORDAN, Petr ,  MAURER, Calvin ,  SINGH, Sarbjit ,  FITTING, Andrew W. ,  MYRONENKO, Andriy ,  GAO, Jian

IPC: A61N5/10 ,  G21K1/04

CPC classification number: A61N5/1049 ,  A61N5/1045 ,  A61N5/1048 ,  A61N2005/1054 ,  A61N2005/1074 ,  G06T7/0012 ,  G21K1/046

Abstract: A method includes determining a first estimate of leaf positions for a plurality of leaves of a multi-leaf collimator (MLC) in a reference coordinate space based on an image generated by an image-based aperture verification system, wherein the leaf positions for the plurality of leaves define an aperture for the MLC. The method further includes determining a second estimate of the leaf positions for the plurality of leaves in the reference coordinate space based on data from an additional source. The method further includes verifying the leaf positions for the plurality of leaves based on comparing the first estimate to the second estimate, wherein the leaf positions are verified if the first estimate deviates from the second estimate by less than a threshold value.

Abstract translation: 一种方法包括基于由基于图像的孔径验证系统生成的图像来确定参考坐标空间中的多叶准直器（MLC）的多个叶片的叶位置的第一估计，其中多个叶片位置 的叶片定义了MLC的孔。 该方法还包括基于来自附加源的数据确定参考坐标空间中的多个叶子的叶位置的第二估计。 该方法还包括基于将第一估计与第二估计进行比较来验证多个叶的叶位置，其中如果第一估计偏离第二估计小于阈值，则验证叶位置。

公开(公告)号：WO2012109158A3

公开(公告)日：2012-08-16

申请号：PCT/US2012/024016

申请日：2012-02-06

Applicant: ACCURAY INCORPORATED ,  SAYEH, Sohail ,  ASMEROM, George ,  RAMRAJ, Sankaralingam ,  GAO, Jian ,  KUDUVALLI, Gopinath

Inventor： SAYEH, Sohail ,  ASMEROM, George ,  RAMRAJ, Sankaralingam ,  GAO, Jian ,  KUDUVALLI, Gopinath

IPC: G21K1/04 ,  G01D5/244 ,  G05B19/401 ,  A61N5/10

Abstract: An apparatus includes a portion that moves along a guided path and a displacement gauge that outputs readings based on the portion's position on the guided path. The apparatus additionally includes an intermediate limit switch that is activated in response to the portion being moved to an intermediate position on the guided path. The apparatus also includes a processing device configured to calibrate the apparatus based on a first reading corresponding to a first position on the guided path and a second reading corresponding to a second position on the guided path. The processing device verifies the calibration based on a third reading corresponding to the intermediate position. The apparatus may be a variable aperture collimator.