中国物理B ›› 2005, Vol. 14 ›› Issue (4): 796-801.doi: 10.1088/1009-1963/14/4/027

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Near-field x-ray phase contrast imaging and phase retrieval algorithm

朱化凤, 谢红兰, 高鸿奕, 陈建文, 李儒新, 徐至展   

  1. Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai,201800, China
  • 收稿日期:2004-07-02 修回日期:2004-11-29 出版日期:2005-04-20 发布日期:2005-03-28
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 60278030)

Near-field x-ray phase contrast imaging and phase retrieval algorithm

Zhu Hua-Feng (朱化凤), Xie Hong-Lan (谢红兰), Gao Hong-Yi (高鸿奕), Chen Jian-Wen (陈建文), Li Ru-Xin (李儒新), Xu Zhi-Zhan (徐至展)   

  1. Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • Received:2004-07-02 Revised:2004-11-29 Online:2005-04-20 Published:2005-03-28
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 60278030)

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摘要： Theoretical analyses of x-ray diffraction phase contrast imaging and near field phase retrieval method are presented. A new variant of the near field intensity distribution is derived with the optimal phase imaging distance and spatial frequency of object taken into account. Numerical examples of phase retrieval using simulated data are also given. On the above basis, the influence of detecting distance and polychroism of radiation on the phase contrast image and the retrieved phase distribution are discussed. The present results should be useful in the practical application of in-line phase contrast imaging.

Abstract: Theoretical analyses of x-ray diffraction phase contrast imaging and near field phase retrieval method are presented. A new variant of the near field intensity distribution is derived with the optimal phase imaging distance and spatial frequency of object taken into account. Numerical examples of phase retrieval using simulated data are also given. On the above basis, the influence of detecting distance and polychroism of radiation on the phase contrast image and the retrieved phase distribution are discussed. The present results should be useful in the practical application of in-line phase contrast imaging.

Key words: x-ray, phase contrast imaging, phase retrieval, diffraction

中图分类号:  (X- and γ-ray instruments)

  • 07.85.-m