发明授权
US07856078B2 Method and X-ray CT system for generating computed tomography displays
有权
用于生成计算机断层显像的方法和X射线CT系统
- 专利标题: Method and X-ray CT system for generating computed tomography displays
- 专利标题(中): 用于生成计算机断层显像的方法和X射线CT系统
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申请号: US12153416申请日: 2008-05-19
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公开(公告)号: US07856078B2公开(公告)日: 2010-12-21
- 发明人: Herbert Bruder , Rainer Raupach , Bernhard Schmidt
- 申请人: Herbert Bruder , Rainer Raupach , Bernhard Schmidt
- 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: DE102007024409 20070525
- 主分类号: A61B6/00
- IPC分类号: A61B6/00
摘要:
A method is disclosed for generating computed tomography displays, in which with the aid of at least one X-ray source, an examination object is scanned in a rotationally circulating fashion with a measured dose rate dependent on the circulation angle, projection data are collected from a multiplicity of viewing angles, and at least similarly redundant projection data from angularly identical or angularly complementary projection angles with a different measured dose are interpolated with distance weighted relative to a projection value and are used for reconstruction. According to at least one embodiment of the invention, during the distance weighted interpolation of the at least similarly redundant projection data an additional noise optimizing weighting is carried out as a function of the noise present per projection value. Furthermore, an X-ray computed tomography system is disclosed for generating tomographic displays of an examination object with the aid of an arithmetic logic unit, including computer program code for evaluating detector data and carrying out a reconstruction, the arithmetic logic unit including program code that during operation executes at least one embodiment of the method.
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