Fig. 4.

Data from tomography scans at fixed Fresnel number of 2.0, at (I) $s=0.95\mu \mathrm{m}$ ($\zeta =0.501\mu \mathrm{m}$) and (II) $0.51\mu \mathrm{m}$ ($\zeta =0.934\mu \mathrm{m}$). (a) Respective flat-field-corrected projections and (c) BAC-reconstructed projections. Colored bars indicate the position of the profiles shown in (b). The same virtual slice (d) in the $xz$ plane with a zoom-in in (e) and (f) in the $xy$ plane. Red arrows mark PCs. Data from quantitative analysis are summarized in Table 1. Scale bars: $100\mu \mathrm{m}$.