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Figure 4
Quantification of edge resolution in a 3 mm-thick aluminium rod submerged in water after phase retrieval was applied to material A, water. Panel (a) shows a phase contrast slice of the aluminium cylinder while panels (b) and (c) show the same slice after from phase retrievals performed through the single-material algorithm [equation (1)[link]] and 3DMPR, respectively. Panel (d) plots line profiles produced by azimuthally averaging around the entire aluminium–water interface to compare the raw phase contrast resolution with that of the conventional 2D phase retrieval and our 3D masking method. A solid vertical line is used to show the mask radius, notably not visible in (c), while a horizontal line shows the theoretical μ value of the low-Z material (water) used for replacing the masked aluminium in the 3D reconstruction. Images (b) and (c) share the same colour palette.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 32| Part 5| September 2025| Pages 1319-1327
https://doi.org/10.1107/S1600577525005843
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