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    • 55. 发明申请
    • Computer Tomography Imaging Device and Method
    • 计算机断层扫描成像装置及方法
    • US20120140874A1
    • 2012-06-07
    • US13322696
    • 2009-12-30
    • Liang LiZhiqiang ChenLi ZhangKejun KangYuanjing LiYinong LiuYuxiang XingZiran Zhao
    • Liang LiZhiqiang ChenLi ZhangKejun KangYuanjing LiYinong LiuYuxiang XingZiran Zhao
    • A61B6/03A61B6/08
    • A61B6/032A61B6/06A61B6/4452A61B6/469G06T11/006G06T2211/416G06T2211/421G06T2211/424
    • The present invention discloses a method for performing CT imaging on a region of interest of an object under examination, comprising: acquiring the CT projection data of the region of interest; acquiring the CT projection data of region B; selecting a group of PI line segments covering the region of interest, and calculating the reconstruction image value for each PI line segment in the group; and combining the reconstruction image values in all the PI line segments to obtain the image of the region of interest. The present invention further discloses a CT imaging device using this method and a data processor therein. Since the 2D/3D slice image of the region of interest can be exactly reconstructed and obtained as long as the X-ray beam covers the region of interest and the region B, it is possible to use a small-sized detector to perform CT imaging on the region of interest at any position of a large-sized object, which reduces to a great extent the radiation dose of the X-ray during the CT scanning.
    • 本发明公开了一种对被检查物体的感兴趣区域进行CT成像的方法,包括:获取感兴趣区域的CT投影数据; 获取区域B的CT投影数据; 选择覆盖感兴趣区域的一组PI线段,并计算组中每个PI线段的重建图像值; 并且将所有PI线段中的重建图像值组合以获得感兴趣区域的图像。 本发明还公开了一种使用该方法的CT成像装置及其中的数据处理器。 由于只要X射线束覆盖感兴趣区域和区域B,就可以精确地重构和获得感兴趣区域的2D / 3D切片图像,因此可以使用小尺寸检测器来执行CT成像 在大尺寸物体的任何位置处的感兴趣区域,其在CT扫描期间在很大程度上降低X射线的辐射剂量。