中国物理B ›› 2015, Vol. 24 ›› Issue (6): 68704-068704.doi: 10.1088/1674-1056/24/6/068704

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Cosine fitting radiography and computed tomography

李盼云a b, 张凯a, 黄万霞a, 袁清习a, 王研a b, 鞠在强a b, 吴自玉a, 朱佩平a c   

  1. 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
  • 收稿日期:2014-12-24 修回日期:2015-01-16 出版日期:2015-06-05 发布日期:2015-06-05
  • 基金资助:
    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).

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   

  1. 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
  • Received:2014-12-24 Revised:2015-01-16 Online:2015-06-05 Published:2015-06-05
  • Contact: Zhang Kai, Zhu Pei-Ping E-mail:zhangk@ihep.ac.cn;zhupp@ihep.ac.cn
  • About author:87.59.-e; 42.25.Fx; 87.64.mh; 42.30.Wb
  • Supported by:
    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).

摘要: 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.

关键词: x-ray imaging, diffraction-enhanced imaging, phase contrast, computed tomography

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.

Key words: x-ray imaging, diffraction-enhanced imaging, phase contrast, computed tomography

中图分类号:  (X-ray imaging)

  • 87.59.-e
42.25.Fx (Diffraction and scattering) 87.64.mh (Phase contrast and DIC) 42.30.Wb (Image reconstruction; tomography)