发明申请
US20110182400A1 METHOD AND APPARATUS TO IMPROVE CT IMAGE ACQUISITION USING A DISPLACED GEOMETRY
有权
使用位移几何来改进CT图像采集的方法和装置
- 专利标题： METHOD AND APPARATUS TO IMPROVE CT IMAGE ACQUISITION USING A DISPLACED GEOMETRY
- 专利标题（中）： 使用位移几何来改进CT图像采集的方法和装置
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申请号： US13120660申请日： 2009-10-05
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公开(公告)号： US20110182400A1公开(公告)日： 2011-07-28
- 发明人: Peter Forthmann , Thomas Koehler , Udo Van Stevendaal , Matthias Bertram , Steffen Wiesner , Colas Schretter
- 申请人： Peter Forthmann , Thomas Koehler , Udo Van Stevendaal , Matthias Bertram , Steffen Wiesner , Colas Schretter
- 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
- 国际申请： PCT/IB2009/054353 WO 20091005
- 主分类号： A61B6/03
- IPC分类号： A61B6/03 ; G01N23/04
摘要：
A method and apparatus are provided to improve CT image acquisition using a displaced acquisition geometry. A CT apparatus may be used having a source (102) and a detector (104) transversely displaced from a center (114) of a field of view (118) during acquisition of the projection data. The amount of transverse displacement may be determined based on the size of the object (108). The source and the detector may be adjusted to vary the size of the transverse field of view. The first data set acquired by the detector may be reconstructed and used to simulate missing projection data that could not be acquired by the detector at each projection angle. The measured projection data and the simulated projection data may be used to obtain a second data set. The second data set may be compared to the first data set to produce a corrected data set.