发明申请
US20070195923A1 Cone beam ct apparatus using truncated projections and a previously acquired 3d ct image
有权
锥形束ct装置使用截断的投影和以前获得的3d ct图像
- 专利标题: Cone beam ct apparatus using truncated projections and a previously acquired 3d ct image
- 专利标题(中): 锥形束ct装置使用截断的投影和以前获得的3d ct图像
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申请号: US11568115申请日: 2005-03-31
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公开(公告)号: US20070195923A1公开(公告)日: 2007-08-23
- 发明人: Thomas Netsch , Georg Rose , Hermann Schomberg
- 申请人: Thomas Netsch , Georg Rose , Hermann Schomberg
- 申请人地址: NL Eindhoven 5621 BA
- 专利权人: KONINKLIJKE PHILIPS ELECTRONICS N.V.
- 当前专利权人: KONINKLIJKE PHILIPS ELECTRONICS N.V.
- 当前专利权人地址: NL Eindhoven 5621 BA
- 优先权: EP04300216.1 20040421
- 国际申请: PCT/IB05/51087 WO 20050331
- 主分类号: H05G1/60
- IPC分类号: H05G1/60 ; A61B6/00 ; G01N23/00 ; G21K1/12
摘要:
A 3D image of a region of an object is computed from truncated cone beam projection data acquired with an x-ray device and a prior CT image representing a larger region of the object. The truncated projection data are extrapolated to derive pseudoprojection data associated with projection directions outside the detector, and an intermediate CT image is reconstructed based on the truncated projection data completed with the pseudoprojection data. The prior CT image is then registered with the intermediate CT image. Forward projection data associated with projection directions outside the detector are computed from the truncated projection data and the registered prior CT image. The 3D image is finally reconstructed based on the truncated projection data completed with the forward projection data.