摘要
为提高扇束滤波反投影(FBP)算法重建CT图像的速度,本文提出了一种利用对称反投影并结合递归迭代的方法来减少反投影的运算量。研究表明该方法可使重建速度提高约23倍,且不会带来新的重建误差。
To improve CT image reconstruction speed of fan-beam filtered backprojection (FBP), thispaper proposes a method combining backprojection symmetry with iterative technique to reduce backprojection calculation. Research shows the speed can be improved about 23 times by this method, and it can’t bring reconstruction result new error.
出处
《CT理论与应用研究(中英文)》
2004年第4期16-19,共4页
Computerized Tomography Theory and Applications
关键词
计算机层析成像
扇束扫描
滤波反投影算法
快速重建
computed tomography
fan-beam scan
filtered backprojection algorithm
fastreconstruction