几种CT图像重建算法的研究和比较

Research and Comparison on Several CT Reconstruction Algorithms

本文研究了滤波反投影算法（ＦＢＰ）、局部重建算法（ＬｏｃａｌＲＡ）、修正的代数重建算法（ＭＡＲＴ）。用特别设计的仿真数据和实采数据，分别对这三种算法进行了成像数值试验。分析和比较了各算法的重建速度、空间分辨率、密度分辨率，及其优缺点和适用范围。

Filter back projection(FBP) algorithm, local reconstruction algorithm(Local RA) and modified algebraic reconstruction technique are researched. The experiments of imaging reconstruction are made to these algorithms by using designed simulation data and real XCT data respectively. Analysis and comparison of these algorithms on reconstruction speed, spatial resolution, density resolution, as well as the advantages and disadvantages are given.