Theory and method of dual-energy x-ray grating phase-contrast imaging

作     者：Feng Rong Yan Gao Cui-Juan Guo Wei Xu Wei Xu 荣锋;高艳;郭翠娟;徐微;徐伟

作者机构：College of Electronics and Information EngineeringTianjin Polytechnic UniversityTianjin 300387China Tianjin Key Laboratory of Optoelectronic Detection Technology and SystemTianjin Polytechnic UniversityTianjin 300387China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2019年第28卷第10期

页      面：597-602页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.61405144) the Natural Science Foundation of Tianjin,China(Grant No.15JCQNJC42100) the Technology Special Commissioner Project of Tianjin,China(Grant Nos.16JCTPJC47200 and 16JCTPJC48100) 

主　　题：x-ray imaging dual-energy analyzer grating phase retrieval 

摘      要：The principle of dual-energy x-ray grating phase-contrast imaging(DEPCI) is clarified by using the theory of x-ray interference and Fresnel diffraction. A new method of retrieving phase from the two interferograms is proposed for DEPCI,and its feasibility is verified via simulation. Finally, the proposed method applied to DEPCI experiment demonstrates the effectiveness of the method. This paper lays the theoretical foundation for performance optimization of DEPCI and the further integration of DEPCI and computed tomography.