| 转台一次偏置扫描的ICT重建算法 |
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| 引用本文： | 陈云斌,李寿涛,王远,胡栋材,陈浩,黎明,许州.转台一次偏置扫描的ICT重建算法[J].中国体视学与图像分析,2011(3):248-253. |
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| 作者姓名： | 陈云斌 李寿涛 王远 胡栋材 陈浩 黎明 许州 |
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| 作者单位： | 中国工程物理研究院应用电子学研究所; |
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| 摘 要： | 目的工业CT的检测对象大小不一,在探测器尺寸一定的情况下,工程上往往通过设计不同的扫描方式以及所对应的重建算法来获得更大的成像范围,比如转台偏置、探测器偏置等扫描模式。本文提出一种用于转台一次偏置扫描模式下的重建算法。该算法首先用Parker类型函数对重复采样的投影数据进行加权,然后用扇束重建算法得到断层图像。实验结果证明了这种方法的有效性和优越性。
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| 关 键 词： | 工业CT 转台偏置扫描 探测器偏置扫描 空间分辨率 扫描视野 |
An ICT reconstruction algorithm for rotation off-centered scan |
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| CHEN Yunbin,LI Shoutao,WANG Yuan,HU Dongcai,CHEN Hao,LI Ming,XU Zhou.An ICT reconstruction algorithm for rotation off-centered scan[J].Chinese Journal of Stereology and Image Analysis,2011(3):248-253. |
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| Authors: | CHEN Yunbin LI Shoutao WANG Yuan HU Dongcai CHEN Hao LI Ming XU Zhou |
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| Institution: | CHEN Yunbin,LI Shoutao,WANG Yuan,HU Dongcai,CHEN Hao,LI Ming,XU Zhou(Institute of Applied Electronics of Chinese Academy of Engineering Physics,Mianyang 621900,China) |
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| Abstract: | The samples to be detected by industrial CT have varying sizes.Different scanning models and corresponding reconstruction algorithms are designed to enlarge the field of view under the condition of a detector of fixed size,such as rotation off-centered,detector displaced.This paper proposes a reconstruction algorithm applied to rotation off-centered scanning.This method weights the redundant projection data sampled twice with a Parker type function first.Then standard fan beam reconstruction algorithm is ap... |
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| Keywords: | industrial computed tomography rotation off-centered scan detector displaced scan spatial resolution field of view |
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