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Cosine fitting radiography and computed tomography |
Li Pan-Yun (李盼云)a b, Zhang Kai (张凯)a, Huang Wan-Xia (黄万霞)a, Yuan Qing-Xi (袁清习)a, Wang Yan (王研)a b, Ju Zai-Qiang (鞠在强)a b, Wu Zi-Yu (吴自玉)a, Zhu Pei-Ping (朱佩平)a c |
a Laboratory 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 |
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Abstract 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.
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Received: 24 December 2014
Revised: 16 January 2015
Accepted manuscript online:
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PACS:
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87.59.-e
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(X-ray imaging)
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42.25.Fx
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(Diffraction and scattering)
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87.64.mh
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(Phase contrast and DIC)
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42.30.Wb
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(Image reconstruction; tomography)
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Fund: Project supported by the National Basic Research Program of China (Grant No. 2012CB825800), the National Natural Science Foundation of China (Grant Nos. 11205189, 11375225, and U1332109), the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant Nos. KJCX2-YW-N42, Y4545320Y2, and 542014IHEPZZBS50659). |
Corresponding Authors:
Zhang Kai, Zhu Pei-Ping
E-mail: zhangk@ihep.ac.cn;zhupp@ihep.ac.cn
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About author: 87.59.-e; 42.25.Fx; 87.64.mh; 42.30.Wb |
Cite this article:
Li Pan-Yun (李盼云), Zhang Kai (张凯), Huang Wan-Xia (黄万霞), Yuan Qing-Xi (袁清习), Wang Yan (王研), Ju Zai-Qiang (鞠在强), Wu Zi-Yu (吴自玉), Zhu Pei-Ping (朱佩平) Cosine fitting radiography and computed tomography 2015 Chin. Phys. B 24 068704
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