| 基于不完备投影数据重建的四种迭代算法比较研究 |
| |
| 引用本文： | 阙介民,王燕芳,孙翠丽,魏存峰,史戎坚,魏龙.基于不完备投影数据重建的四种迭代算法比较研究[J].CT理论与应用研究,2012,21(2):169-178. |
| |
| 作者姓名： | 阙介民 王燕芳 孙翠丽 魏存峰 史戎坚 魏龙 |
| |
| 作者单位： | 1. 北京市射线成像技术与装备工程技术研究中心,北京100049 中国科学院高能物理研究所核分析技术重点实验室,北京100049 中国科学院研究生院,北京100049
2. 北京市射线成像技术与装备工程技术研究中心,北京100049 中国科学院高能物理研究所核分析技术重点实验室,北京100049 |
| |
| 摘 要： | 在发射成像和穿透成像过程中,由于各种原因会造成投影数据不完备,若仍采用传统解析方法重建出的图像会产生伪影,而迭代算法则可以很好地改善图像质量。本文应用不同的迭代算法分别就真实标准线对测试卡的稀疏投影数据和有限角度投影数据进行重建,定量分析比较它们各自的优缺点,为几种迭代算法的工程或临床应用提供重要参考。
|
| 关 键 词： | 稀疏投影 有限角投影 迭代算法 图像总变差 MAP |
Comparison of Four Iterative Algorithm Based on Incomplete Projection Reconstruction |
| |
| QUE Jie-min,WANG Yan-fang,SUN Cui-li,WEI Cun-fen,SHI Rong-jian,WEI Long.Comparison of Four Iterative Algorithm Based on Incomplete Projection Reconstruction[J].Computerized Tomography Theory and Applications,2012,21(2):169-178. |
| |
| Authors: | QUE Jie-min WANG Yan-fang SUN Cui-li WEI Cun-fen SHI Rong-jian WEI Long |
| |
| Institution: | 1,2 1. Key Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, CAS, Beijing 100049, China 2. Beijing Engineering Research Center of Radiographic Techniques and Equipment, Beijing 100049, China 3. Graduate University of Chinese Academy of Sciences, CAS, Beijing 100049, China |
| |
| Abstract: | In emission computerized tomography and transmission computerized tomography, the analytic algorithm reconstruction used incomplete data will result in image artifacts in the result reconstructed. But the iterative algorithm would improve the quality of reconstruction images. In this paper, four type iterative reconstruction algorithm is applied to experimental sparse projections and limited-angle projections of the resolution test phantom. Their advantage and disadvantages are analyzed quantitatively. The study will provide the reference for the clinical or engineering application of the algorithm. |
| |
| Keywords: | sparse projection limited-angle projection iterative algorithm total variance (TV) MAP |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
