ISSN 1004-4140
CN 11-3017/P
熊亮, 张丽, 陈志强, 邢宇翔. 切向CT重建算法的研究[J]. CT理论与应用研究, 2007, 16(1): 10-18.
引用本文: 熊亮, 张丽, 陈志强, 邢宇翔. 切向CT重建算法的研究[J]. CT理论与应用研究, 2007, 16(1): 10-18.
shu
XIONG Liang, ZHANG Li, CHEN Zhi-qiang, XING Yu-xiang. Investigation into Tangential-CT Reconstruction Algorithm[J]. CT Theory and Applications, 2007, 16(1): 10-18.
Citation: XIONG Liang, ZHANG Li, CHEN Zhi-qiang, XING Yu-xiang. Investigation into Tangential-CT Reconstruction Algorithm[J]. CT Theory and Applications, 2007, 16(1): 10-18.
shu

切向CT重建算法的研究

Investigation into Tangential-CT Reconstruction Algorithm

    摘要
  • 摘要: 在工业CT的检测过程中,由于各种原因可能造成投影数据的不完备。在这种情况下,直接利用传统的解析重建方法(FBP)或者统计重建方法(EM)都不能给出理想的重建结果,从切向CT扫描方式获得的就是典型的不完备投影数据。本文利用迭代算法来改善重建图像的质量,首先通过已有的投影数据合理估计缺失的投影数据,并通过不断的迭代来改善这种估计,从而使得重建图像不断逼近真实物体。

     

    Abstract: In the detection process of industrial CT,there exist many factors which can cause incomplete projection data.In such cases,using traditional reconstruction methods(like FBP or EM) directly will not lead to satisfying results.Tangential-CT geometry is one kind of typical situation of incomplete projection data.In this issue,we use iterative method to improve the quality of reconstruction image.We estimate the missing projection data through acquired projection data and make the estimation more and more correct through iteration.Finally we can get an improved reconstruction image.

     

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