用对称反投影及递归迭代实现扇束CT快速重建

详细信息

Fast Reconstruction of Fan-beam CT Using Symmetry Backprojection and Iterative Technique

School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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。
- 计算机层析成像 /
- 扇束扫描 /
- 滤波反投影算法 /
- 快速重建
Abstract: 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.
- computed tomography /
- fan-beam scan /
- filtered backprojection algorithm /
- fastreconstruction