| 基于乘型ART算法的快速图像重建技术研究 |
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| 引用本文： | 陈晔,马铁华. 基于乘型ART算法的快速图像重建技术研究[J]. 应用基础与工程科学学报, 2005, 0(Z1) |
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| 作者姓名： | 陈晔 马铁华 |
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| 作者单位： | 中北大学电子工程系 中北大学电子工程系 山西太原 山西太原 |
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| 摘 要： | 为了利用迭代算法快速实现不完全投影数据下的图像重建,介绍了乘型ART(A lgebraic Reconstruction Techniques)迭代算法的快速实现,利用投影矩阵是一个极大的超稀疏矩阵的性质,对迭代矩阵计算方法进行简化,并对其存储结构和检索方法进行优化设计,使迭速度得到了大大提高.在不完全投影的情况下,该迭代算法具有一定的优势.同时针对迭代模型不足导致的重建伪影提出了校正方法,取得了理想的效果.
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| 关 键 词： | 图像重建 ART 计算机断层扫描 滤波反投影 迭代矩阵 |
Fast Image Reconstruction Method Based on Multiplying-type ART Algorithm |
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| CHEN Ye,MA Tiehua. Fast Image Reconstruction Method Based on Multiplying-type ART Algorithm[J]. Journal of Basic Science and Engineering, 2005, 0(Z1) |
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| Authors: | CHEN Ye MA Tiehua |
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| Abstract: | In order to realize the fast image reconstruction with iterative algorithm on the base of(incomplete) projection data,the fast multiplying-type ART(Algebraic Reconstruction(Techniques)) algorithm is introduced.According to the fact that the projection matrix is a super sparse matrix,the calculating method of the iterative matrix is simplified,and it's structure and looking up way are optimized,which make iterative speed improved obviously.The result proves that the multiplying-type ART algorithm has an advantage over the result that is (generated) through filter back-projection algorithm when using incomplete projection data.In addition,the reconstructed artifact caused by the shortage of the projection matrix model is(corrected) and an ideal effect is finally got. |
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| Keywords: | image reconstruction ART computed tomography filter back-projection.(iterative) matrix |
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