发明授权
US08260017B2 Rotation center identifying method and apparatus, ring artifact correction method, and X-ray diagnostic apparatus employing the same
有权
旋转中心识别方法和装置，环形伪迹校正方法，以及采用该方法和装置的X射线诊断装置
- 专利标题： Rotation center identifying method and apparatus, ring artifact correction method, and X-ray diagnostic apparatus employing the same
- 专利标题（中）： 旋转中心识别方法和装置，环形伪迹校正方法，以及采用该方法和装置的X射线诊断装置
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申请号： US12388788申请日： 2009-02-19
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公开(公告)号： US08260017B2公开(公告)日： 2012-09-04
- 发明人: Satoru Ohishi , Clay Christopher Smith
- 申请人： Satoru Ohishi , Clay Christopher Smith
- 申请人地址： JP Tokyo JP Otawara-shi
- 专利权人： Kabushiki Kaisha Toshiba,Toshiba Medical Systems Corporation
- 当前专利权人： Kabushiki Kaisha Toshiba,Toshiba Medical Systems Corporation
- 当前专利权人地址： JP Tokyo JP Otawara-shi
- 代理机构： Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- 主分类号： G06K9/00
- IPC分类号： G06K9/00
摘要：
The influences of the vibrations and the like of a rotational radiography system are corrected with respect to a projection image for each projection direction which contains an artificial artifact, and volume data containing only a ring artifact is generated by image reconstruction using the projection images. A ring center is determined by using this volume data, and polar coordinate conversion of an actual radiographed image is executed by using the ring center as an origin, thereby extracting a signal (ring artifact) parallel to an angular axis.
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