[1]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.[doi:10.3724/SP.J.1249.2017.03284]
　Hong Zhenhou,Zhou Bin,and Guo Jinchuan.A new filter function for the image reconstruction of cone beam X-ray CT[J].Journal of Shenzhen University Science and Engineering,2017,34(3):284-289.[doi:10.3724/SP.J.1249.2017.03284]
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锥束X射线CT图像重建的新型滤波函数()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第34卷
期数:
2017年第3期
页码:
284-289
栏目:
光电工程
出版日期:
2017-05-30

文章信息/Info

Title:
A new filter function for the image reconstruction of cone beam X-ray CT
文章编号:
201703010
作者:
洪振厚; 周彬; 郭金川
深圳大学光电工程学院，光电子器件与系统教育部／广东省重点实验室，广东深圳518060
Author(s):
Hong Zhenhou;  Zhou Bin;  and Guo Jinchuan
College of Optoelectronic Engineering, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, Guangdong Province, P.R.China
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
Keywords:
optical engineering;  computed tomography;  FDK algorithm;  filter function;  Gibbs phenomenon;  mixed filter theorem;  weighted average theorem
分类号:
TP 391.41
DOI:
10.3724/SP.J.1249.2017.03284
文献标志码:
A
摘要:
针对X射线计算机断层成像（computed tomography，CT）图像重建FDK算法中，采用通常的滤波函数会导致明显的Gibbs现象，影响重建图像的质量．基于混合滤波和加权平均理论，设计了一种新型的NEW-MS-L滤波函数．先将S-L滤波函数加权平均为M3S-L滤波函数，再与NEW滤波函数叠加,得到NEW-MS-L滤波函数．通过数值仿真，分别对比NEW、R-L-S-L、R-L-NEW、R-L-MS-L和NEW-MS-L滤波函数的重建图像效果，结果表明，NEW-MS-L滤波函数能够在保持较高图像分辨率的情况下，更有效地抑制Gibbs现象，使重建图像效果更佳．
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.

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备注/Memo

备注/Memo:
Received：2016-11-29；Accepted：2017-03-09
Foundation：National Natural Science Foundation of China（11674232, 11074172）
Corresponding author：Professor Guo Jinchuan. E-mail: jcguo@szu.edu.cn
Citation：Hong Zhenhou,Zhou Bin,Guo Jinchuan.A new filter function for the image reconstruction of cone beam X-ray CT ［J］. Journal of Shenzhen University Science and Engineering, 2017, 34(3): 284-289.（in Chinese）
基金项目：国家自然科学基金资助项目(11674232，11074172)
作者简介：洪振厚(1991—)，男，深圳大学硕士研究生．研究方向：X光成像．E-mail：paul_hongzh@163.com
引文：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.
更新日期/Last Update: 2017-04-20