发明名称 Adaptive detector masking for speed-up of cone beam reconstruction
摘要 A scanning and data acquisition technique for three dimensional (3D) computerized tomographic (CT) imaging of an object, wherein scanning at a plurality of positions along a source scanning trajectory causes an area detector to acquire cone beam projection data corresponding to a shadow of said object at each of scanning positions and Radon derivative data is calculated by processing line integral values from cone beam projection data. In order to improve the calculation efficiency of the Radon derivative calculation, calculation of the Radon derivative data uses a determination of the left and right boundaries of the shadow for each of the scanning positions, and calculates the Radon derivative data only using projection data from within the determined boundaries.
申请公布号 US5878103(A) 申请公布日期 1999.03.02
申请号 US19970884248 申请日期 1997.06.30
申请人 SIEMENS CORPORATE RESEARCH, INC. 发明人 SAUER, FRANK;SAMARASEKERA, SUPUN
分类号 A61B6/03;G01N23/04;G06T1/00;(IPC1-7):A61B6/03 主分类号 A61B6/03
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