| 扇束滤波反投影重构算法中旋转中心误差校正 |
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| 引用本文： | 傅健,路宏年.扇束滤波反投影重构算法中旋转中心误差校正[J].兵工学报,2003,24(3):334-337. |
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| 作者姓名： | 傅健 路宏年 |
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| 作者单位： | 北京航空航天大学机械工程及自动化学院,北京,100083 |
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| 摘 要： | 扇束工业CT系统普遍采用滤波反投影(FBP)重构算法。该算法要求扫描检台旋转中心须与FBP算法重构中心一致。受扫描系统精度的限制，这一要求难以得到充分的满足，从而引起重构图像出现重影伪像。为此，推导了一种校正方法。计算机模拟和实验证明了该方法的有效性。这种方法对ICT扫描系统的调试具有参考价值。
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| 关 键 词： | 滤波反投影 重构算法 扇束工业CT系统 旋转中心 误差校正 图象处理 X射线成像 计算机层析成像 |
CORRECTION OF ERROR IN THE CENTER OF ROTATION OF FAN-BEAM FILTER BACK PROJECTION ALGORITHMS |
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| Fu Jian,Lu Hongnian.CORRECTION OF ERROR IN THE CENTER OF ROTATION OF FAN-BEAM FILTER BACK PROJECTION ALGORITHMS[J].Acta Armamentarii,2003,24(3):334-337. |
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| Authors: | Fu Jian Lu Hongnian |
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| Abstract: | Filter back projection (FBP) reconstruction algorithm is adopted by fan beam industrial CT systems. This algorithm requires the center of rotation of the scan inspection platform to be identical with the reconstruction center of the FBP algorithm. This requirement is hardly satisfied in full under the accuracy restriction of the scanning system. Consequently a kind of artifact called double shadow exhibits itself in reconstruction images. A method of correction is presented to reduce the artifacts. The validity of the method is verified by computer simulation results and experiments. This method is valuable to the debugging of industrial CT scanning systems. |
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| Keywords: | information processing technique X ray image computed tomography(CT) filter back projection algorithm artifact correction |
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