摘要
提出了一种快速投影系数计算方法。该方法只需通过简单的增量运算,即可确定射线穿过的网格编号并计算相交长度。实验结果表明该方法非常有效,与Siddon算法相比,重建速度提高了六倍多。
A fast approach for projection coefficient computation was presented, which could determine the grid index and calculate the length of the grid intercepted by the ray only requiring a simple incremental algorithml Experiment result showed the approach was very effective and the reconstruction speed was improved over 6 times compared with the Siddon algorithm.
出处
《计算机应用研究》
CSCD
北大核心
2007年第5期38-40,共3页
Application Research of Computers
基金
国家自然科学基金资助项目(50375126)
咸阳师范学院专项科研基金资助项目(04XSYK210)
关键词
代数重建法
图像重建
投影系数
Siddon算法
algebraic reconstruction technique(ART)
image reconstruction
projection coefficient
Siddon algorithm