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Figure 3
One reconstructed phase image [(a) and (c)] and the extracted δ spectra [(b) and (d)]. (b) δ spectrum of one pixel, indicated by the light blue dot in (a), with assumed thickness of Δs = 8.6 µm (blue) and Δs = 7.9 µm (orange), together with the δ spectrum calculated from the absorption with kkcalc (black line). The error bars correspond to the standard deviation of the region in air indicated by the rectangles in (a) where we know δ to be constant. (d) δ spectra averaged over two different ROIs, indicated by the rectangles in (c), with different assumed thicknesses. Here, the error bars correspond to the variation of calculated δ values in the ROIs, primarily due to varying thickness in the ROI itself.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 31| Part 4| July 2024| Pages 867-876
https://doi.org/10.1107/S1600577524003229
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