公开(公告)号：US06577701B2

公开(公告)日：2003-06-10

申请号：US10199067

申请日：2002-07-22

申请人： Masaaki Ukita ,  Taketo Kishi ,  Shuhei Onishi ,  Eiichi Shintani

发明人： Masaaki Ukita ,  Taketo Kishi ,  Shuhei Onishi ,  Eiichi Shintani

IPC分类号： A61B603

CPC分类号： G06T3/4007 ,  A61B6/032 ,  Y10S378/901

摘要： An X-ray tube (X-ray focus) and an X-ray detector opposed to each other across an object synchronously scan the object to acquire radiographic data in each scan position. A section reconstruction method is provided in which the radiographic data or data resulting from a filtering process of the radiographic data is projected as back projection data back to a two-dimensional or three-dimensional reconstruction area virtually set to a region of interest of the object. Enlarged interpolation data is generated by interpolating the back projection data and then the enlarged interpolation data is projected back to the reconstruction area without interpolation. The number of interpolation computations is reduced to an amount corresponding to the enlargement by interpolation of the back projection data, to shorten the reconstruction computation time.

摘要翻译： 在物体上彼此相对的X射线管（X射线焦点）和X射线检测器同步扫描物体以获取每个扫描位置的射线照相数据。 提供了一种部分重建方法，其中将来自放射线照相数据的滤波处理的射线照相数据或数据作为背投影数据投影回二维或三维重建区域，该二维或三维重建区域实际上设置为对象的感兴趣区域 。 通过内插反投影数据生成放大的内插数据，然后将放大的插补数据投影回重建区域而不进行插值。 内插计算的数量通过反投影数据的内插减少到与放大相对应的量，以缩短重建计算时间。