Affiliation:
1. Ghent University Centre for X-Ray Tomography (UGCT)
2. Paul Scherrer Institute
3. University and ETH Zurich
4. Ghent University
Abstract
The dark-field signal provided by X-ray grating interferometry is an invaluable tool for providing structural information beyond the direct spatial resolution and their variations on a macroscopic scale. However, when using a polychromatic source, the beam-hardening effect in the dark-field signal makes the quantitative sub-resolution structural information inaccessible. Especially, the beam-hardening effect in dual-phase grating interferometry varies with spatial location, inter-grating distance, and diffraction order. In this work, we propose a beam-hardening correction algorithm, taking into account all these factors. The accuracy and robustness of the algorithm are then validated by experimental results. This work contributes a necessary step toward accessing small-angle scattering structural information in dual-phase grating interferometry.
Funder
Interreg Vlaanderen-Nederland
European Regional Development Fund
Provincie Oost-Vlaanderen
Fonds Wetenschappelijk Onderzoek
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Personalized Health and Related Technologies
Subject
Atomic and Molecular Physics, and Optics
Cited by
1 articles.
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