摘要
锥束工业CT常采用Feldkamp算法进行图像重建,其计算复杂度为O(N4),在普通微机上重建异常耗时。为提高其重建速度,提出了一种利用对称性并结合递归技术的方法来减少该算法的反投影运算量。在普通微机上检验了该方法的重建速度及重建质量。研究表明该方法可使重建速度提高约32倍,且不会引入新的重建误差,实现了在普通微机上的快速重建。
In cone-beam industrial CT, fieldkamp algorithm was often used to reconstruct image. Because its computational complexity is O（N^4）, the reconstruction process is very time-consuming on a general microcomputer. To improve its reconstruction speed, a method combining symmetry with recursion technique to reduce backprojection calculation is presented. The reconstruction speed and quality of this method are verified on a general microcomputer. Research result shows the speed is improved about 32 times via this method, and it can＇t bring reconstruction rcsult new error. Fast reconstruction on a general microcomputer is realized.
出处
《计算机工程与设计》
CSCD
北大核心
2006年第6期931-933,共3页
Computer Engineering and Design
基金
国家自然科学基金项目(60402042)
