Performance evaluation of the backprojection filtered (BPF) algorithm in circular fan-beam and cone-beam CT

作     者：LI Liang CHEN Zhi-Qiang ZHANG Li KANG Ke-Jun 

作者机构：Department of Engineering Physics Tsinghua University Beijing 100084 China 

基　　金：Supported by a grant from the Ph.D. Programs Foundation of Ministry of Education of China (No. 20030003074) and the National Natural Science Founda-tion of China (No. 10575059) 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2006年第17卷第2期

页      码：113-117页

摘      要：In this article we introduce an exact backprojection filtered (BPF) type reconstruction algorithm for cone-beam scans based on Zou and Pan’s work. The algorithm can reconstruct images using only the projection data passing through the parallel PI-line segments in reduced scans. Computer simulations and practical experiments are carried out to evaluate this algorithm. The BPF algorithm has a higher computational efficiency than the famous FDK algorithm. The BPF algorithm is evaluated using the practical CT projection data on a 450 keV X-ray CT system with a flat-panel detector (FPD). From the practical experiments, we get the spatial resolution of this CT system. The algo- rithm could achieve the spatial resolution of 2.4 lp/mm and satisfies the practical applications in industrial CT inspec- tion.

主 题 词：反向发射滤波器算法 BPF Hilbert转换 算法理论 

学科分类：08[工学] 081202[081202] 0812[工学-测绘类] 

核心收录：

D　O　I：10.1016/S1001-8042(06)60022-5

馆 藏 号：203393626...