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    • 9. 发明授权
    • Systems and methods for imaging large field-of-view objects
    • 用于对大型视野对象进行成像的系统和方法
    • US07661881B2
    • 2010-02-16
    • US11522794
    • 2006-09-18
    • Eugene A. GregersonRichard K. GrantNorbert Johnson
    • Eugene A. GregersonRichard K. GrantNorbert Johnson
    • H05G1/04
    • A61B6/4452A61B6/032A61B6/06A61B6/4021A61B6/4085A61B6/4233A61B6/4405G01N23/043G01N23/046G01N2223/419
    • An imaging apparatus and related method comprising a source that projects a beam of radiation in a first trajectory; a detector located a distance from the source and positioned to receive the beam of radiation in the first trajectory; an imaging area between the source and the detector, the radiation beam from the source passing through a portion of the imaging area before it is received at the detector; a detector positioner that translates the detector to a second position in a first direction that is substantially normal to the first trajectory; and a beam positioner that alters the trajectory of the radiation beam to direct the beam onto the detector located at the second position. The radiation source can be an x-ray cone-beam source, and the detector can be a two-dimensional flat-panel detector array. The invention can be used to image objects larger than the field-of-view of the detector by translating the detector array to multiple positions, and obtaining images at each position, resulting in an effectively large field-of-view using only a single detector array having a relatively small size. A beam positioner permits the trajectory of the beam to follow the path of the translating detector, which permits safer and more efficient dose utilization, as generally only the region of the target object that is within the field-of-view of the detector at any given time will be exposed to potentially harmful radiation.
    • 一种成像装置和相关方法,包括:在第一轨迹中投影辐射束的源; 位于距离源一定距离并被定位成接收第一轨迹中的辐射束的检测器; 在源和检测器之间的成像区域,来自源的辐射束在被检测器接收之前通过成像区域的一部分; 检测器定位器,其将检测器平移到基本上垂直于第一轨迹的第一方向上的第二位置; 以及光束定位器,其改变辐射束的轨迹以将光束引导到位于第二位置的检测器上。 辐射源可以是X射线锥束源,并且检测器可以是二维平板检测器阵列。 本发明可以用于通过将检测器阵列转换为多个位置来对检测器的视野进行成像,并且在每个位置获得图像,从而产生仅使用单个检测器的有效的大的视场 阵列具有相对较小的尺寸。 光束定位器允许光束的轨迹遵循平移检测器的路径,其允许更安全和更有效的剂量利用,因为通常仅在目标物体的位于检测器的视野内的区域处于任何 给定的时间会暴露在潜在的有害辐射之下。