[1]刘鑫,郭金川.部分相干光源微分相衬双图像相位恢复[J].深圳大学学报理工版,2014,31(2):169-173.[doi:10.3724/SP.J.1249.2014.02169]
 Liu Xin and Guo Jinchuan.Dual-images phase retrieval in differential phase-contrast imaging with partial coherence source[J].Journal of Shenzhen University Science and Engineering,2014,31(2):169-173.[doi:10.3724/SP.J.1249.2014.02169]
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部分相干光源微分相衬双图像相位恢复()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第31卷
期数:
2014年第2期
页码:
169-173
栏目:
光电工程
出版日期:
2014-03-20

文章信息/Info

Title:
Dual-images phase retrieval in differential phase-contrast imaging with partial coherence source
文章编号:
20140210
作者:
刘鑫 郭金川
深圳大学光电工程学院,光电子器件与系统教育部重点实验室,深圳 518060
Author(s):
Liu Xin and Guo Jinchuan
College of Optoelectronic Engineering, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education, Shenzhen University, Shenzhen 518060, P.R.China
关键词:
干涉成像相位光栅吸收光栅X射线部分相干光源相位恢复微分相衬成像
Keywords:
interferometric imaging phase grating absorption grating X-ray partially coherent source phase retrieval differential phase contrast imaging
分类号:
O 434.19; O 438.2
DOI:
10.3724/SP.J.1249.2014.02169
文献标志码:
A
摘要:
基于部分相干光成像理论,结合X射线微分相衬成像特点,给出有限大小焦斑光源物体微分相衬成像干涉条纹强度分布.建立基于吸收光栅微分干涉条纹探测模型,该模型给出可见光探测器探测强度表达式.根据光强分布,提出一种新的相位恢复算法,该算法仅需两幅物体曝光图像,相对旧算法,减少了物体曝光次数,有利于减少物体X射线剂量的吸收.模拟实验验证了该算法的有效性
Abstract:
X-ray phase contrast imaging techniques can directly detect the structure of soft tissues in the medicine, biology and material sciences because those methods can provide higher sensitivity than the conventional X-ray radiography. Based on the partial coherence theory, the intensity distribution of X-ray interferogram with the source of finite focus is presented. The detecting model of visible light detector with absorption grating is built and relative intensity of signal is given also. A new phase retrieval algorithm, which needs only two X-ray images of sample, is proposed according to the detecting model. The new algorithm helps reduce the absorption of X-ray dose. The computer simulation has been performed to verify the feasibility of our proposed algorithm.

参考文献/References:

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备注/Memo

备注/Memo:
Received:2013-09-13;Revised:2013-11-27;Accepted:2013-12-01
Foundation:National Natural Science Foundation of China (61101175); Shenzhen Science and Technology Research Foundation (2008340)
Corresponding author:Professor Guo Jinchuan. E-mail: jcguo@szu.edu.cn
Citation:Liu Xin, Guo Jinchuan. Dual-images phase retrieval in differential phase-contrast imaging with partial coherence source[J]. Journal of Shenzhen University Science and Engineering, 2014, 31(2): 169-173.(in Chinese)
基金项目:国家自然科学基金资助项目(61101175);深圳市科技计划资助项目(2008340)
作者简介:刘鑫(1978-),男(汉族),湖北省广水市人,深圳大学讲师、博士. E-mail:liu5221@gmail.com
引文:刘鑫, 郭金川. 部分相干光源微分相衬双图像相位恢复[J]. 深圳大学学报理工版,2014,31(2):169-173.
更新日期/Last Update: 2014-03-20