[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(No.3(221-330)):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(No.3(221-330)):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No.3(221-330)
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