发明申请
US20060233294A1 Computerized tomography method with helical relative movement and conical beam
失效
具有螺旋相对运动和锥形束的计算机断层扫描方法
- 专利标题: Computerized tomography method with helical relative movement and conical beam
- 专利标题(中): 具有螺旋相对运动和锥形束的计算机断层扫描方法
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申请号: US10546231申请日: 2004-02-11
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公开(公告)号: US20060233294A1公开(公告)日: 2006-10-19
- 发明人: Claas Bontus , Thomas Koehler
- 申请人: Claas Bontus , Thomas Koehler
- 申请人地址: NL BA Eindhoven NL-5621
- 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 BA Eindhoven NL-5621
- 优先权: EP03100384.1 20030219
- 国际申请: PCT/IB04/00346 WO 20040211
- 主分类号: H05G1/60
- IPC分类号: H05G1/60 ; A61B6/00 ; G01N23/00 ; G21K1/12
摘要:
The invention relates to a computerized tomography method, in which an examination area is scanned radiographically along a helical trajectory by a conical beam. The radiation transmitted through the examination area is measured by means of a detector unit, wherein the absorption distribution in the examination area is reconstructed exactly or at least quasi-exactly from these measured values. Reconstruction uses redundant measured values and comprises derivation of the measured values from parallel rays of different projections, integration of these values along κ-lines, weighting of these values and back-projection.