发明授权
US07711081B2 Method for compiling computer tomographic representations using a CT system with at least two angularly offset ray sources
有权
使用具有至少两个角偏移射线源的CT系统来编译计算机断层图像表示的方法
- 专利标题: Method for compiling computer tomographic representations using a CT system with at least two angularly offset ray sources
- 专利标题(中): 使用具有至少两个角偏移射线源的CT系统来编译计算机断层图像表示的方法
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申请号: US11491959申请日: 2006-07-25
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公开(公告)号: US07711081B2公开(公告)日: 2010-05-04
- 发明人: Herbert Bruder , Thomas Flohr , Karl Schwarz , Karl Stierstorfer
- 申请人: Herbert Bruder , Thomas Flohr , Karl Schwarz , Karl Stierstorfer
- 申请人地址: DE Munich
- 专利权人: Siemens Aktiengesellschaft
- 当前专利权人: Siemens Aktiengesellschaft
- 当前专利权人地址: DE Munich
- 代理机构: Harness, Dickey & Pierce, P.L.C.
- 优先权: DE102005034876 20050726
- 主分类号: A61B6/03
- IPC分类号: A61B6/03
摘要:
A method is disclosed for compiling computer tomographic representations using a CT system with at least two angularly offset ray sources. A first ray cone with a relatively larger fan angle and a second ray cone with a relatively smaller fan angle scan an object circularly or spirally. The first ray cone generates a first dataset A and the second ray cone generates a dataset B. The dataset B of the smaller ray cone is supplemented with other data at the edge to give an expanded dataset B+ for reconstruction of the CT representation. The expanded dataset B+ of the second, smaller ray cone and the dataset A of the first, larger ray cone is subjected to a convolution operation to give datasets B+′ and A′. Finally, a back projection to reconstruct sectional images or volume data is respectively carried out from the convoluted datasets B+′ and A′. The dataset B is supplemented with data of the dataset A and supplementary data are removed from the dataset B+′ after the convolution but before the back projection.