Abstract For weakly absorbing materials, image contrast can be enhanced by phase contrast in formation. The effectiveness of the in-line phase contrast technique relies on its ability to record intensity data which contain information on the x-ray's phase shift. Four kinds of approaches to the relationship between intensity distribution and phase shift are reviewed and discussed. A micro-focal x-ray source with high geometrical magnification is used to acquire phase contrast images. A great improvement on image quality is shown and geometrical parameters are modified for comparison between different imaging positions.
Received: 09 December 2005
Revised: 22 April 2006
Accepted manuscript online:
PACS:
07.85.Fv
(X- and γ-ray sources, mirrors, gratings, and detectors)
Fund: Project supported by the National Natural Science Foundation of China (Grant No 10475044).
Cite this article:
Zhang Di(章迪), Li Zheng(李政), Huang Zhi-Feng(黄志峰), Yu Ai-Min(禹爱民), and Sha Wei(沙薇) In-line phase contrast for weakly absorbing materials with a microfocus x-ray source 2006 Chinese Physics 15 1731
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