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基于微元法的高精度系统响应矩阵建模
引用本文:邓贞宙,段志文,谢庆国.基于微元法的高精度系统响应矩阵建模[J].核电子学与探测技术,2011,31(10):1125-1130.
作者姓名:邓贞宙  段志文  谢庆国
作者单位:1. 武汉光电国家实验室(筹),湖北武汉430074;华中科技大学生命科学与技术学院,湖北武汉430074
2. 武汉光电国家实验室(筹),湖北武汉430074;华中科技大学数学与统计学院,湖北武汉430074
基金项目:国家自然科学基金(60972099); 科技部国际合作重点项目(2009DFR30580)
摘    要:系统响应矩阵是以矩阵形式表征的从激励到响应的数值化关系.由于绝大多数正电子发射成像的重建算法都包含正投影和反投影的计算步骤,系统响应矩阵精度是研究者普遍关心的重要因素之一.通过对系统响应矩阵进行微元法建模,提高了系统响应矩阵的精度.数值结果显示,随着微元的尺寸变小,64点微元正投影的信噪比提高了100倍以上,16线微元...

关 键 词:微元法  系统响应矩阵建模  PET图像重建

System Response Matrix Modeling with High Accuracy Via Infinitesimalanalysis
DENG Zhen-zhou,DUAN Zhi-wen,XIE Qing-guo.System Response Matrix Modeling with High Accuracy Via Infinitesimalanalysis[J].Nuclear Electronics & Detection Technology,2011,31(10):1125-1130.
Authors:DENG Zhen-zhou  DUAN Zhi-wen  XIE Qing-guo
Affiliation:DENG Zhen-zhou1,2,DUAN Zhi-wen1,3,XIE Qing-guo1,2(1.National Laboratory for Optoelectronics,Wuhan of Hubei Prov.430074,China,2.School of Life of Science and Technology,Huazhong University of Science and Technology,3.School of Mathematics and Statistics,China)
Abstract:System response matrix is the numerical relation from excitation to response.Cause most medical image reconstruction employ forward projection and backward projection,system response matrix is one of the essential issues attracted many researchers' attention.It proposes a infinitesimalanalysis method for modeling the system response matrix.Accuracy of system response matrix is improved.Numerical experiment show that SNR(Signal Noise Ratio) of forward projection is increased to more than 1 000 times via 64 p...
Keywords:Infinitesimalanalysis method  System response matrix  PET image reconstruction  
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