Figure 4

Horizontal slices obtained from the six samples (extracted from 3D images): (a) 3D-MCT for sample S1 at 2 µm resolution, (b) 3D-MCT for samples S2 at 1 µm resolution, (c–f) 3D-MCT for samples S3 to S6 at 0.5 µm resolution, and (g,h) 3D-NCT for samples S5 and S6 at 60 ηm resolution.