| 考虑实际投影成像平面位置的扇束滤波反投影(FFBP)算法 |
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| 引用本文： | 裴晓东,张全红.考虑实际投影成像平面位置的扇束滤波反投影(FFBP)算法[J].CT理论与应用研究,2005,14(3):18-23. |
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| 作者姓名： | 裴晓东 张全红 |
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| 作者单位： | 西安电子科技大学机电工程学院,7100071;北京航空航天大学机械工程及自动化学院,100083 |
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| 摘 要： | 扇束滤波反投影(Fan-beam Filtered Back Projection- FFBP)算法理论公式中,投影成像平面位于旋转中心;而实际CT扫描系统中,投影成像平面与旋转中心都存在一定距离.考虑到实际投影成像平面位置,本文推导了它的FFBP算法(即IFFBP-Improved Fan-beam Filtered Back Projection算法),比较了此两种情况下(即忽略成像平面与旋转中心距离)FFBP、IFFBP算法重建质量.计算机模拟和实验结果证明了IFFBP算法的正确性.
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| 关 键 词： | 计算机层析成像 滤波反投影 投影成像平面岸 重建质量 |
| 文章编号： | 1004-4040（2005）03-0018-06 |
| 收稿时间： | 2005-05-18 |
| 修稿时间： | 2005年5月18日 |
Fan-beam Filtered Back-projection (FFBP) Algorithm Considering Practical Place of Projection Imaging Plane |
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| PEI Xiao-dong,ZHANG Quan-hong.Fan-beam Filtered Back-projection (FFBP) Algorithm Considering Practical Place of Projection Imaging Plane[J].Computerized Tomography Theory and Applications,2005,14(3):18-23. |
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| Authors: | PEI Xiao-dong ZHANG Quan-hong |
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| Abstract: | In the theoretic formula of fan-beam filtered back projection (FFBP) algorithm, the projection imaging plane lies on the center of rotation, but in practical CT scan system, it keeps the center at a distance. With respect to this problem, this paper proposes an improved fan-beam filtered back projection (IFFBP) algorithm, and compares reconstruction quality of FFBP with IFFBP. The results of computer simulation and experiment validate IFFBP algorithm. |
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| Keywords: | computed tomography filtered back projection algorithm projection imaging plane Reconstruction quality |
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