发明授权
- 专利标题: Computer tomography method for a periodically moving object
- 专利标题(中): 用于周期性移动物体的计算机断层摄影方法
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申请号: US10552399申请日: 2004-04-02
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公开(公告)号: US07426257B2公开(公告)日: 2008-09-16
- 发明人: Thomas Köhler , Michael Grass , Roland Proksa
- 申请人: Thomas Köhler , Michael Grass , Roland Proksa
- 申请人地址: NL Eindhoven
- 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
- 优先权: EP03100975 20030410
- 国际申请: PCT/IB2004/001061 WO 20040402
- 国际公布: WO2004/089217 WO 20041021
- 主分类号: A61B6/03
- IPC分类号: A61B6/03
摘要:
The invention relates to a computer tomography method in which a periodically moving object, in particular an organ of the body, is irradiated by a cone-shaped beam cluster (4) along a trajectory which runs on a cylindrical surface. The radiation transmitted through the object is measured by means of a detector unit (16), and at the same time the periodic movement of the object is recorded. In order to reconstruct the absorption distribution of the object, the measured values or the corresponding beams are rebinned to form a number of parallel projections, where for each of these projections a measured value is determined whose beam irradiates the object. The point in time at which this measured value was acquired is allocated to the respective projection. For the reconstruction, which may for example be carried out using a filtered back-projection, only projections whose allocated points in time lie within a predefined, specific time range (H1) within a period of the object movement are used.