Accurate reconstruction algorithm for bilateral differential phase signals
作者机构：Platform of Advanced Photon Source Technology R&DLaboratory of X-Ray Optics and TechnologyBeijing Synchrotron Radiation FacilityInstitute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Science(UCAS)Beijing 100049China
出 版 物：《Radiation Detection Technology and Methods》 (辐射探测技术与方法（英文）)
年 卷 期：2021年第5卷第3期
页 面：474-479页
核心收录：
学科分类：0810[工学-信息与通信工程] 08[工学] 0807[工学-动力工程及工程热物理] 0827[工学-核科学与技术] 0703[理学-化学] 081001[工学-通信与信息系统] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）]
基 金：National Natural Science Foundation of China, NNSFC, NNSF, NSF, NSFC, (11535015, 11804356, 12027812, 61671311, JSZL2018208C003) Key Laboratory of Particle Astrophysics, Institute of High Energy Physics Institute of High Energy Physics, IHEP, (Y454532)
主 题：X-ray phase Streaking artifacts Bilateral
摘 要：Background The differential phase computed tomography(DP-CT)imaging is a kind of X-ray-phase-based CT methods,which is widely used in various X-ray imaging *** present,a collection of projections with the horizontal direc-tion(perpendicular to the sample rotation axis)DP information is often acquired in *** an ideal experiment,if the background is zero,then we can accurately reconstruct the information of each direction of the sample with horizontal data ***,background information will produce streaking artifacts to affect the resolution in directions other than the horizontal *** To mitigate the streaking artifacts in the conventionally reconstructed DP-CT *** This study develops a novel analytical DP-CT reconstruction framework by jointly using the bilateral DP information obtained along two perpendicular *** addition,a new data acquisition scheme is also proposed to quickly acquire the bilateral DP signal without the need of changing the direction of refraction signal *** Experimental results demonstrate that this new algorithm is able to greatly reduce the streaking artifacts on DP-CT images.
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