公开(公告)号：US20080118024A1

公开(公告)日：2008-05-22

申请号：US11781141

申请日：2007-07-20

申请人： MIN-HYOUNG CHO ,  SOO-YEOL LEE ,  IN-KON CHUN ,  SANG-CHUL LEE

发明人： MIN-HYOUNG CHO ,  SOO-YEOL LEE ,  IN-KON CHUN ,  SANG-CHUL LEE

IPC分类号： A61B6/03

CPC分类号： A61B6/00 ,  A61B6/4035 ,  G06T11/005

摘要： Disclosed is a method for reconstructing an X-ray CT (computerized tomography) image. The method includes acquiring projection data by means of irradiation of X-rays on a target object at a position close to an X-ray generator such that a portion of the target object including a local region of interest exists within a range of irradiation angles of X-rays, calculating virtual projection data on the assumption that the X-rays are irradiated on the entire target object at the close position, based on projection data acquired through irradiation of the X-rays on the entire target object at a position where the entire target object exists within the range of irradiation angles of X-rays, combining the virtual projection data on the entire target object except data on the local region of interest with the projection data acquired at the position close to the X-ray generator, and reconstructing the combined projection data.

摘要翻译： 公开了一种重建X射线CT（计算机断层摄影）图像的方法。 该方法包括通过在靠近X射线发生器的位置处对目标物体照射X射线来获取投影数据，使得包括局部感兴趣区域的目标对象的一部分存在于照射角度 X射线，基于假设X射线被照射在关闭位置处的整个目标物体上的X射线，基于通过在整个目标物体上的X射线的照射获得的投影数据来计算虚拟投影数据， 整个目标物体存在于X射线的照射角度的范围内，将除了感兴趣的局部区域上的数据之外的整个目标物体上的虚拟投影数据与在靠近X射线发生器的位置获取的投影数据相组合，以及 重建组合投影数据。