Influence of tube voltage and current on in-line phase contrast imaging using a microfocus x-ray source

Chen, L., Zheng, L., Yu, A-M and Li, C-Q (2007) Influence of tube voltage and current on in-line phase contrast imaging using a microfocus x-ray source. Chinese Physics, 16 (8). pp. 2319-2324.

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.