Abstract In-line x-ray phase contrast imaging has attracted much attention due to two major advantages: its effectiveness in imaging weakly absorbing materials, and the simplicity of its facilities. In this paper a comprehensive theory based on Wigner distribution developed by Wu and Liu [Med. Phys. 31 2378-2384 (2004)] is reviewed. The influence of x-ray source and detector on the image is discussed. Experiments using a microfocus x-ray source and a CCD detector are conducted, which show the role of two key factors on imaging: the tube voltage and tube current. High tube current and moderate tube voltage are suggested for imaging.
Received: 17 October 2006
Revised: 21 December 2006
Accepted manuscript online:
(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:
Li Chen(李晨), Li Zheng(李政), Yu Ai-Min(禹爱民), and Li Cheng-Quan(黎成权) Influence of tube voltage and current on in-line phase contrast imaging using a microfocus x-ray source 2007 Chinese Physics 16 2319
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