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Figure 1
Experimental setups for the subset of dark-field X-ray imaging techniques explored in this study. (a) Propagation-based imaging, (b) single-grid imaging, which employs one 2D periodic grid, and (c) speckle-based imaging, which uses a piece of sandpaper or random membrane. (d) The two samples imaged using the setups shown in panels (a)–(c), with the red boxes indicating the regions imaged. The carbon-sphere sample comprised (i) carbon fibres, (ii) 1.5 mm diameter polymethyl meth­acrylate (PMMA) spheres and (iii) 6 µm diameter PMMA microspheres in a plastic tube. The four-rod sample consisted of (i) a reed diffuser stick, (ii) a solid PMMA rod, (iii) a toothpick and (iv) a tree twig.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 33| Part 2| March 2026| Pages 437-447
https://doi.org/10.1107/S1600577525011403
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