A new method of detecting interferogram in differential phase-contrast imaging system based on special structured x-ray scintillator screen |
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Authors: | Liu Xin Guo Jin-Chuan Niu Han-Ben |
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Affiliation: | College of Optoelectronic Engineering, Shenzhen University, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education, Shenzhen 518060, China |
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Abstract: | An x-ray scintillator screen with a special structure, functioning as detector and analyser grating, was proposed for collecting the interferogram of differential phase contrast imaging without absorption grating and difficulty of fabrication by a state of the art technique. On the basis of phase grating diffraction, a detecting model of the scintillator screen was built for analysing the phase and absorption information of objects. According to the analysis, a new method of phase retrievals based on two-images and the optimal structure of screen were presented. |
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Keywords: | differential phase contrast x-ray scintillator screen phase retrieval |
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