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Chinese Physics C> 2005, Vol. 29> Issue(S1) : 133-136 

Study on Extraction Method of Phase Information in X-Ray Diffraction Enhanced Imaging

  •  Department of Engineering Physics,Tsinghua University,Beijing 100084,China2 Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China

  • X-ray diffraction enhanced imaging (DEI) based on synchrotron radiation is effectively applied to the inspection of internal structures of weakly absorbing low-Z samples, such as soft issue. Its key problem is how to extract refractive angle images, which reflect phase gradients in samples, from DEI images. Geometric-optics approximation methods and statistical methods of multiple images are investigated in this paper. Then a new extraction method, named `statistical-geometric-optics approximation', is brought forward. It is validated by experiments at BSRF and proved that it can improve the exactness of geometric-optics approximation solutions and the Signal to Noise Ratio (SNR) of refractive angle images.
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    [1] . Atsushi Momuose et al. Analytical Sciences, 2001, 17:527—5302. Davis T J, GAO D et al. Nature, 1995, 373: 595—5983. Chapman D, Thomlinson W et al. Phys. Med. Biol., 1997,42: 2015—20254. Miles N Wernick et al. Phys. Med. Biol., 2003, 48: 3875—38955. ZHU P P, WANG J Y et al. Acta. Phys. Sin., 2005, 54(1):58—66(in Chinese)(朱佩平，王寯越等.物理学报，2005, 54(1): 58-666. JIANG X M, LI G at al. HEPNP, 2004, 28(12): 1282—1290(in Chinese)(姜晓明，黎刚等.高能物理与核物理, 2004, 28(12): 1282-1290)7. Oral Oltulu, Zhong Zhong, Moumen Hasnah et al. J. Phys.D: Appl. Phys., 2003, 36: 2152—21568. Pagot E, Cloetens P, Fiedler S et al. Applied Physics Let-ters, 2003, 82(20): 3421—3423

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HUANG Zhi-Feng, LI Zheng, KANG Ke-Jun, ZHU Pei-Ping, YUAN Qing-Xi, HUANG Wan-Xia, WANG Jun-Yue, LI Gang, ZHANG Di and YU Ai-Min. Study on Extraction Method of Phase Information in X-Ray Diffraction Enhanced Imaging[J]. Chinese Physics C, 2005, 29(S1): 133-136.
HUANG Zhi-Feng, LI Zheng, KANG Ke-Jun, ZHU Pei-Ping, YUAN Qing-Xi, HUANG Wan-Xia, WANG Jun-Yue, LI Gang, ZHANG Di and YU Ai-Min. Study on Extraction Method of Phase Information in X-Ray Diffraction Enhanced Imaging[J]. Chinese Physics C, 2005, 29(S1): 133-136. shu
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Received: 2005-10-31
Revised: 1900-01-01
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Study on Extraction Method of Phase Information in X-Ray Diffraction Enhanced Imaging

    Corresponding author: HUANG Zhi-Feng,
  • Department of Engineering Physics,Tsinghua University,Beijing 100084,China2 Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China
  • Received Date: 2005-10-31
  • Accepted Date: 1900-01-01
  • Available Online: 2005-01-02

Abstract: X-ray diffraction enhanced imaging (DEI) based on synchrotron radiation is effectively applied to the inspection of internal structures of weakly absorbing low-Z samples, such as soft issue. Its key problem is how to extract refractive angle images, which reflect phase gradients in samples, from DEI images. Geometric-optics approximation methods and statistical methods of multiple images are investigated in this paper. Then a new extraction method, named `statistical-geometric-optics approximation', is brought forward. It is validated by experiments at BSRF and proved that it can improve the exactness of geometric-optics approximation solutions and the Signal to Noise Ratio (SNR) of refractive angle images.

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