Simulation framework for X-ray grating interferometry optimization

作     者：Spindler, Simon Pereira, Alexandre Sommer, Pascal Rawlik, Michal Romano, Lucia Stampanoni, Marco 

作者机构：Swiss Fed Inst Technol Inst Biomed Engn CH-8092 Zurich Switzerland Paul Scherrer Inst Ctr Photon Sci Villigen Switzerland 

出 版 物：《OPTICS EXPRESS》 (Opt. Express)

年 卷 期：2025年第33卷第1期

页      面：1345-1358页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：Personalized Health and Related Technologies (PHRT) [2022-572 INTIMACY] Schweizerischer Nationalfonds zur Forderung der Wissenschaftlichen Forschung (SNF) SNF Sinergia Grant [CRSII5] Promedica Stiftung Swiss LOS lottery Kanton Aargau 2021-612 CLARINET 189662 

主　　题：Imaging systems Modulation transfer function Optical components Spatial resolution Wave propagation X-ray interferometry 

摘      要：Wave-front propagation simulations have been a tool to design and optimize X-ray interferometry devices. The often used plane wave approaches, however, lack the angular resolution to describe effects like system imperfections or inhomogeneous samples in conjunction with the X-ray source size. We developed a framework that allows to simulate optical components as well as samples with any source size in arbitrary configurations by inducing the mentioned effects within the wave propagation instead of adding intermediate models. The simulation results were able to predict and explain the impact of local grating defects for different focal spot sizes and provided a spectral sampling optimization for image acquisition. The simulation framework can run on GPU, do out-of-memory calculations, and is publicly available on Github. Published by Optica Publishing Group under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article s title, journal citation, and DOI.