| 一类广义的乘积型迭代算法 |
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| 引用本文： | 于志伟. 一类广义的乘积型迭代算法[J]. 计算机研究与发展, 1998, 35(11): 1008-1013 |
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| 作者姓名： | 于志伟 |
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| 作者单位： | 杭州电子工业学院CAD研究所 |
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| 摘 要： | 文中利用Ｂｒｅｇｍａｎ函数构造的Ｄ偏差函数定义放射ＣＴ图像重建的投影数据与图象经数值投影得到的数据之间的偏差，由此构造了广义乘积型迭代式，发现ＥＣＴ中的ＭＬ－ＥＭ，ＩＳＲＡ等算法都是本迭代式的特例，最后，将其中几种典型情况用于单光子放射ＣＴ（ＳＰＥＣＴ）图象重建。得到了优于ＭＬ－ＥＭ，ＩＳＲＡ算法的结果。
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| 关 键 词： | 乘积型迭代算法 ECT 图像重建 CT |
A GENERALIZED MULTIPLICATIVE ITERATIVE ALGORITHM FOR ECT |
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| Yu Zhiwei. A GENERALIZED MULTIPLICATIVE ITERATIVE ALGORITHM FOR ECT[J]. Journal of Computer Research and Development, 1998, 35(11): 1008-1013 |
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| Authors: | Yu Zhiwei |
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| Abstract: | A distortion ( D distortion) between the actual projection data of emission CT and the numerical projection data of image is defined using Bregman function.A generalized multiplicative iterative algorithm is constructed on the basis of such D distortion.It's found that ML EM and ISRA algorithms of ECT are special instances of this algorithm.Some typical cases of the algorithm are utilized in SPECT image reconstruction from projection and many interesting results are obtained. |
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| Keywords: | D distortion multiplicative iterative algorithm ML EM algorithm ECT image reconstructionClass number TP391 |
| 本文献已被 CNKI 维普 等数据库收录！ |
