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

HUANG Zhi-Feng; LI Zheng; KANG Ke-Jun; ZHU Pei-Ping; YUAN Qing-Xi; HUANG Wan-Xia; WANG Jun-Yue; LI Gang; ZHANG Di; YU Ai-Min

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

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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.

References

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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.

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Received: 2005-10-31
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

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.