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    • 96. 发明公开
    • Radiosurgery x-ray system with collision avoidance subsystem
    • 带避免碰撞子系统的放射外科X射线系统
    • EP1872829A3
    • 2009-01-21
    • EP07114471.1
    • 2005-03-15
    • Accuray, Inc.
    • Wong, PhillipSayeh, SohailWang, James
    • A61N5/10
    • G05B19/4061A61B6/4464A61N5/10A61N5/1081G05B2219/49137
    • The present invention provides a radiosurgery and/or radiotherapy x-ray system including a collision avoidance subsystem for detecting and avoiding obstacles during treatment. The system includes an x-ray source having an emission head at a distal end of an articulated arm assembly extending from a base unit, with the head being adapted for selectively emitting an x-ray beam along a beam axis, and including an associated controller for selectively orienting the head whereby the beam extends along a succession of treatment axes. The system further includes a collision avoidance subsystem including means for preventing the head and arm assembly from effecting a collision with an object in one or more pre-computed exclusion zones.
    • 本发明提供了一种放射外科和/或放疗X射线系统,其包括用于在治疗期间检测和避开障碍物的防撞子系统。 该系统包括X射线源,该X射线源具有位于从基座单元延伸的铰接臂组件的远端处的发射头,该头适于沿着射束轴选择性地发射x射线束并且包括相关联的控制器 用于选择性地定向头部,由此该束沿着一系列治疗轴线延伸。 该系统还包括防碰撞子系统,其包括用于防止头部和臂组件在一个或多个预先计算的排除区中与物体发生碰撞的装置。
    • 97. 发明公开
    • APPARATUS AND METHOD FOR RADIOSURGERY
    • DEVICE AND METHOD FOR定向放射外科
    • EP1635688A4
    • 2008-01-23
    • EP04755109
    • 2004-06-10
    • ACCURAY INC
    • THOMSON EUAN
    • A61B5/05A61N5/10
    • A61N5/1049A61N5/1067A61N5/107
    • A method and system is presented for treating moving target regions in a patient's anatomy by creating radiosurgical lesions. CT scan data representative of a pre-operational iagnostic image of a target region are generated. The plurality of x-rays are generated with an x-ray source. Based on the CT scan data, a treatment plan is generated that defines the requisite beam intensities and paths. The position of the target region is determined in near real time. The composite motion of the target region, due to respiration and heartbeat, is tracked. Signals representative of the change (caused by the composite motion) in the position of the target region at a current time, compared to the position of the target region in the CT scan, are generated. In response, the relative position of the x-ray source and the target is adjusted, so as to account for the composite motion of the target. This process is repeated throughout the treatment. As a result, the x-rays are continually focused onto the target region in accordance with the treatment plan, while the x-ray source tracks the motion of the target region.
    • 100. 发明公开
    • MOTION FIELD GENERATION FOR NON-RIGID IMAGE REGISTRATION
    • BEWEGUNGSFELDERZEUGUNGFÜRNICHTSTARRE BILDREGISTRATION
    • EP1779287A2
    • 2007-05-02
    • EP05725652.1
    • 2005-03-14
    • Accuray, Inc.
    • FU, DongshanKUDUVALLI, Gopinath
    • G06K9/00G06K9/36G06K9/38
    • G06T7/344G06K9/6206G06T2207/10081G06T2207/10121G06T2207/10124G06T2207/30012
    • A method and system is presented for generating a full motion field of an object, when performing non-rigid image registration between a first and a second image of the object. A mesh grid generator (310) generates in the first image a mesh grid having a plurality of mesh nodes, for each of a hierarchy of mesh resolution levels. A nodal motion estimator (320) estimates, for each me node, at least one nodal motion vector that describes a matching of the mesh node with a corresponding mesh node in the second image. At each mesh node, multi-level block matching is performed, using a similarity measure based on pattern intensity. A smoothness constraint is imposed, in order to reconstruct the nodal motion vector for those mesh nodes at which mismatching occurs. A motion field interpolator determines a local motion vector for any desired point of interest within the first image, by interpolating from the nodal motion vectors of the surronding mesh nodes.
    • 当在对象的第一和第二图像之间执行非刚性图像配准时,呈现用于产生对象的全运动场的方法和系统。 网格网格生成器针对网格分辨率级别的层级中的每一者,在第一图像中生成具有多个网格节点的网格网格。 节点运动估计器针对每个网格节点估计描述网格节点与第二图像中的对应网格节点的匹配的至少一个节点运动矢量。 在每个网格节点,使用基于模式强度的相似性度量来执行多级块匹配。 施加平滑度约束,以便为发生不匹配的那些网格节点重建节点运动矢量。 运动场插值器通过从周围网状节点的节点运动向量内插来确定第一图像内任何期望的兴趣点的局部运动矢量。