ISSN 1004-4140
CN 11-3017/P
高河伟, 张丽, 陈志强, 程建平. 有限角度CT图像重建算法综述[J]. CT理论与应用研究, 2006, 15(1): 46-50.
引用本文: 高河伟, 张丽, 陈志强, 程建平. 有限角度CT图像重建算法综述[J]. CT理论与应用研究, 2006, 15(1): 46-50.
GAO He-wei, ZHANG Li, CHEN Zhi-qiang, CHENG Jian-ping. Reviews of Image Reconstruction from Limited-angle[J]. CT Theory and Applications, 2006, 15(1): 46-50.
Citation: GAO He-wei, ZHANG Li, CHEN Zhi-qiang, CHENG Jian-ping. Reviews of Image Reconstruction from Limited-angle[J]. CT Theory and Applications, 2006, 15(1): 46-50.

有限角度CT图像重建算法综述

Reviews of Image Reconstruction from Limited-angle

  • 摘要: 本文主要介绍了处理有限角度CT图像重建的思路和方法。有限角度CT图像重建属于不完全数据重建范畴,由于不满足数据完备性条件,因此不能精确重建。其处理方法大致可以分为两类:基于变换的迭代-解析重建算法和基于级数展开的迭代-代数/统计重建算法。同时,有限角度重建等价于病态矩阵求逆问题,适当的约束条件、先验知识以及正则化因子对提高重建图像质量非常重要。

     

    Abstract: In this paper,the methods and algorithms for image reconstruction from limited-angle are discussed.It belongs to incomplete-data reconstruction,since the data sufficient condition is not satisfied and exact reconstruction is technically impossible.The methods and algorithms can be classified into two categories:transform-based iterative-analytic reconstructions and series expansion-based iterative-algebraic/statistical reconstructions.Meanwhile,image reconstruction from limited-angle is equivalent to inversion of ill-posed matrix so that proper limitation conditions,a prior knowledge and regularizations play vital roles.

     

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