Cosine fitting radiography and computed tomography

A new method in diffraction-enhanced imaging computed tomography （DEI-CT） that follows the idea developed by Chapman et al. [Chapman D, Thomlinson W, Johnston R E, Washburn D, Pisano E, Gmur N, Zhong Z, Menk R, Arfelli F and Sayers D 1997 Phys. Med. BioL 42 2015] in 1997 is proposed in this paper. M...

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Published inChinese physics B Vol. 24; no. 6; pp. 679 - 686
Main Author 李盼云 张凯 黄万霞 袁清习 王研 鞠在强 吴自玉 朱佩平
Format Journal Article
LanguageEnglish
Published 01.06.2015
Subjects
Algorithms
Analyzers
Computation
Crystal structure
Diffraction
Projection
Radiography
Tomography
余弦
图像质量
拟合
散射系数
数据采集程序
照相
线性吸收系数
计算机断层扫描
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ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/24/6/068704

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Summary:A new method in diffraction-enhanced imaging computed tomography （DEI-CT） that follows the idea developed by Chapman et al. [Chapman D, Thomlinson W, Johnston R E, Washburn D, Pisano E, Gmur N, Zhong Z, Menk R, Arfelli F and Sayers D 1997 Phys. Med. BioL 42 2015] in 1997 is proposed in this paper. Merged with a ＂reverse projections＂ algorithm, only two sets of projection datasets at two defined orientations of the analyzer crystal are needed to reconstruct the linear absorption coefficient, the decrement of the real part of the refractive index and the linear scattering coefficient of the sample. Not only does this method reduce the delivered dose to the sample without degrading the image quality, but, compared with the existing DEI-CT approaches, it simplifies data-acquisition procedures. Experimental results confirm the reliability of this new method for DEI-CT applications.
Bibliography:LiPan-Yun, ZhangKai, HuangWan_Xia, YuanQing_Xi, Wang Yan, Ju Zai-Qiang, Wu Zi-Yu, and Zhu Pei-Ping（ aLaboratory of x-ray Optics and Technologies, Beijing Synchrotron Radiation Facility （BSRF）, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China b） University of Chinese Academy of Sciences, Beijing 100049, China C）Beijing Center for Mathematics and Information Interdisciplinary Sciences, Beijing 100048, China
x-ray imaging, diffraction-enhanced imaging, phase contrast, computed tomography
A new method in diffraction-enhanced imaging computed tomography （DEI-CT） that follows the idea developed by Chapman et al. [Chapman D, Thomlinson W, Johnston R E, Washburn D, Pisano E, Gmur N, Zhong Z, Menk R, Arfelli F and Sayers D 1997 Phys. Med. BioL 42 2015] in 1997 is proposed in this paper. Merged with a ＂reverse projections＂ algorithm, only two sets of projection datasets at two defined orientations of the analyzer crystal are needed to reconstruct the linear absorption coefficient, the decrement of the real part of the refractive index and the linear scattering coefficient of the sample. Not only does this method reduce the delivered dose to the sample without degrading the image quality, but, compared with the existing DEI-CT approaches, it simplifies data-acquisition procedures. Experimental results confirm the reliability of this new method for DEI-CT applications.
11-5639/O4
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content type line 23
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/24/6/068704