深圳大学学报（理工版）2017，Vol.34Issue(3)：284-289,6.DOI:10.3724/SP.J.1249.2017.03284
锥束X射线CT图像重建的新型滤波函数
A new filter function for the image reconstruction of cone beam X-ray CT
摘要
Abstract
The conventional filter function of the FDK algorithm in X-ray computed tomography (CT) can result in the obvious Gibbs phenomenon, which has great effect on the CT image.A NEW-MS-L filter function is deduced based on the rationale of mixed filter theory and weighted average theory.First, the S-L filter function is weighted and averaged to form M3S-L filter function.Then, as a superposition of the M3S-L filter function and the NEW filter function, the NEW-MS-L filter function is obtained.Compared with the other filter functions such as NEW, R-L-S-L, R-L-NEW, and R-L-MS-L, the NEW-MS-L can suppress the Gibbs phenomenon while maintaining high resolution.The results show that the NEW-MS-L filter function can provide X-ray CT with better reconstruction images.关键词
光学工程/计算机断层成像/FDK算法/滤波函数/Gibbs现象/混合滤波/加权平均Key words
optical engineering/computed tomography/FDK algorithm/filter function/Gibbs phenomenon/mixed filter theorem/weighted average theorem分类
信息技术与安全科学引用本文复制引用
洪振厚,周彬,郭金川..锥束X射线CT图像重建的新型滤波函数[J].深圳大学学报（理工版）,2017,34(3):284-289,6.基金项目
国家自然科学基金资助项目(11674232,11074172)National Natural Science Foundation of China(11674232, 11074172) （11674232,11074172）
