%0 Journal Article
%T Near-field x-ray phase contrast imaging and phase retrieval algorithm<br>近场X射线位相衬度成像及位相恢复算法
%A Zhu Hua-Feng
%A Xie Hong-Lan
%A Gao Hong-Yi
%A Chen Jian-Wen
%A Li Ru-Xin
%A Xu Zhi-Zhan
%A <br>朱化凤
%A 谢红兰
%A 高鸿奕
%A 陈建文
%A 李儒新
%A 徐至展
%J 中国物理 B
%D 2005
%I 
%X 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.
%K x-ray
%K phase contrast imaging
%K phase retrieval
%K diffraction<br>X射线
%K 相衬成像
%K 位相复原
%K 衍射
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=CD8D6A6897B9334F09D8D1648C376FB4&aid=39FF89DE6EFF57C534BC91AE4E214814&yid=2DD7160C83D0ACED&vid=F3583C8E78166B9E&iid=E158A972A605785F&sid=6920A1020E13BE87&eid=0018E43E61963A72&journal_id=1009-1963&journal_name=中国物理&referenced_num=0&reference_num=24