中国物理B ›› 2006, Vol. 15 ›› Issue (8): 1731-1737.doi: 10.1088/1009-1963/15/8/017
章 迪, 李 政, 黄志峰, 禹爱民, 沙 薇
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)
摘要: 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.
中图分类号: (X- and γ-ray sources, mirrors, gratings, and detectors)