摘要
本文基于锥束CT滤波反投影重建的FDK算法,通过两种算法改进并结合基于共享内存的OpenMP并行技术和代码优化,实现了锥束CT图像的快速重建。基于锥束CT实际投影数据的重建结果表明,图像重建速度得到了较大的提高,断层图像重建质量与FDK原型算法相当。
Based on the analysis of traditional FDK filtered-backprojection algorithm for Cone-beam CT reconstruction,two kinds of improvements are presented to accelerate the reconstruction.Together with algorithm improvements,the parallel programming technology Open MP and the SSE,MMX instructions are adopted to optimize the code.The reconstruction from actual cone-beam CT projections shows that these improvements can make the reconstruction much fast while keeping the image quality as good as the traditional FDK algorithm.
出处
《CT理论与应用研究（中英文）》
2007年第4期31-37,共7页
Computerized Tomography Theory and Applications
基金
陕西省科技攻关项目(2005K04-G1)
西安交通大学科学研究基金
关键词
锥束CT
图像重建
FDK滤波反投影法
OpenMP并行技术
Cone-beam CT
image reconstruction
FDK filtered-back projection algorithm
Open MP parallel programming
