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Chinese Physics C> 2007, Vol. 31> Issue(10) : 982-989 

Refraction Angle and Edge Visibility in X-Ray Diffraction Enhanced Imaging

  •  Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China2 China-Japan Friendship Hospital, China-Japan Friendship Institute of Clinical Medical Science,Department of Biochemistry and Molecular Biology, Beijing 100029, China

  • Diffraction-enhanced X-ray imaging could extract accurately the refraction angles of the sample, which is very important to increase the image contrast of low Z samples. In this paper, the DEI experiments with X-rays of different energies were performed both on wedge-shaped and rounded model samples. Refraction angles of the two samples were all obtained accurately, and the results agreed well with the calculations. Quantitative analyses based on Edge Visibility were performed for the wedge-shaped model sample. The results revealed that the calculated positions for the Best Edge Visibility of the slope with fixed refraction angle were calculable in good agreement with the experimental results. A quantitative research on the Edge Visibility of real tissues sample was carried out and the optimal condition for best contrast of DEI images were discussed.
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    [1] . Fitzgerald R. Physics Today Online, 2000 July2. Bravin A. J. Phys. D: Appl. Phys., 2003, 36: A24-A293. JIANG Xiao-Ming et al. HEP NP, 2004, 28: 1282(inChinese) (姜晓明等.高能物理与核物理，2004, 28: 1282)4. David C et al. Appl. Phys. Lett., 2002, 81: 32875. Momose A et al. J. Synchrotron. Rad., 2002, 9: 1366. Snigirev A et al. Rev. Sci. Instrum., 1995, 66: 54867. Chapman D et al. Phys. Med. Biol., 1997, 42: 20158. ZHONG Z et al. Nucl. Instrum. Methods, 2000, A450: 5569. Wernick M N et al. Phys. Med. Biol., 2003, 48: 387510. Wagner A et al. Phys. Med. Biol., 2006, 51: 131311. Connor D M et al. Phys. Med. Biol., 2006, 51: 3283-330012. HUANG Zhi-Feng et al. Phys. Med. Biol., 2006, 51: 303113. Keyrilainen J et al. Nucl. Instrum. Methods, 2002, A488:41914. Wernick M N et al. Phys. Med. Biol., 2003, 48: 3875-389515. HUANG Zhi-Feng. Research on Extraction Methods ofPhase Information and CT Reconstruction Algorithms inDi raction Enhanced Imaging. Tsinghua University, 2006(inChinese) (黄志峰.衍射增强成像的相位信息提取方法和CTS建算法训究.清华大学博士论文，2006)16. Born M, Wolf E. Principles of Optics. 6th edn. Cambridge:Cambridge University Press, 198017. Pagot E et al. Phys. Med. Biol., 2005, 50: 709-72418. Kiss M Z et al. Phys. Med. Biol., 2003, 48: 32519. YUAN Qing-Xi et al. HEP NP, 2005, 29: 1023(inChinese) (袁清习等.高能物理与核物理,2005, 29: 1023) 20. Bravin A et al. Proc. SPIE, 2002, 4682: 167-173

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CHEN Yu, JIA Quan-Jie, LI Gang, WANG Yu-Zhu, XUE Xian-Ying, JIANG Xiao-Ming, CHEN Zhi-Hua, PAN Lin and LI Hong-Yan. Refraction Angle and Edge Visibility in X-Ray Diffraction Enhanced Imaging[J]. Chinese Physics C, 2007, 31(10): 982-989.
CHEN Yu, JIA Quan-Jie, LI Gang, WANG Yu-Zhu, XUE Xian-Ying, JIANG Xiao-Ming, CHEN Zhi-Hua, PAN Lin and LI Hong-Yan. Refraction Angle and Edge Visibility in X-Ray Diffraction Enhanced Imaging[J]. Chinese Physics C, 2007, 31(10): 982-989. shu
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Received: 2007-01-04
Revised: 2007-03-26
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Refraction Angle and Edge Visibility in X-Ray Diffraction Enhanced Imaging

    Corresponding author: JIANG Xiao-Ming,
  • Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China2 China-Japan Friendship Hospital, China-Japan Friendship Institute of Clinical Medical Science,Department of Biochemistry and Molecular Biology, Beijing 100029, China
  • Received Date: 2007-01-04
  • Accepted Date: 2007-03-26
  • Available Online: 2007-10-05

Abstract: Diffraction-enhanced X-ray imaging could extract accurately the refraction angles of the sample, which is very important to increase the image contrast of low Z samples. In this paper, the DEI experiments with X-rays of different energies were performed both on wedge-shaped and rounded model samples. Refraction angles of the two samples were all obtained accurately, and the results agreed well with the calculations. Quantitative analyses based on Edge Visibility were performed for the wedge-shaped model sample. The results revealed that the calculated positions for the Best Edge Visibility of the slope with fixed refraction angle were calculable in good agreement with the experimental results. A quantitative research on the Edge Visibility of real tissues sample was carried out and the optimal condition for best contrast of DEI images were discussed.

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