CT理论与应用研究2012，Vol.21Issue(1)：11-18,8.
一种基于FDK算法的扁平物体局部重建方法
A Method for the Local Reconstruction of Flat Object Based on FDK Algorithm
摘要
Abstract
The local reconstruction with truncated projection data is a difficult problem in CT reconstruction field.Conventional reconstruction algorithms will product severe truncated artifacts.The rising BPF algorithm and POCS iterative algorithm can solve the local reconstruction problem,but their reconstruction efficiency and paralleling performance are poor.In this paper,aiming at special structural flat object,it is found that if the thickness and the horizontal length of local area satisfy some conditions,accurate reconstruction can be carried out using efficient FDK algorithm.The results of numerical experiments show that when the horizontal length of local region is bigger than 1/8 horizontal length of object and the thickness is less than 1/13 horizontal length of object,the reconstruction results are comparable with the true values.The reconstruction results of real data also confirmed FDK algorithm could reconstruct the local area of flat object well under the condition.关键词
CT/FDK算法/扁平物体/局部重建Key words
CT/FDK algorithm/flat object/local reconstruction分类
信息技术与安全科学引用本文复制引用
汪先超,王林元,李磊,闫镔..一种基于FDK算法的扁平物体局部重建方法[J].CT理论与应用研究,2012,21(1):11-18,8.基金项目
国家高技术研究发展计划“863计划” （）
