High-resolution imaging of depth filter structures using X-ray computed tomography Supplementary Tables and Figures
Pixel size (µm)
Thickness imaged (mm)
Porosity (%)
Tortuosity factor
Average pore size (µm)
3 3+ 53.8 ± 13.3 3.27 ± 0.73 13.3 ± 1.3
2 3+ 72.1 ± 2.1 1.62 ± 0.09 12.8 ± 0.4
1 1.5 75.5 ± 1.1 1.72 ± 0.08 13.0 ± 0.9
Table 3SupA Pixel size improvement measurements: medium grade. Results reported to three significant figures in each case and one standard deviation.
Pixel size (µm)
Thickness imaged (mm)
Porosity (%)
Tortuosity factor
Average pore size (µm)
3 3+ 69.0 ± 2.8 1.59 ± 0.09 21.2 ± 1.8
2 3+ 75.4 ± 3.3 1.45 ± 0.10 21.3 ± 3.2
1 1.5 79.1 ± 1.1 1.64 ± 0.07 15.1 ± 0.9
Table 3SupB Pixel size improvement measurements: coarse grade. Results reported to three significant figures in each case and one standard deviation.
a b c
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Supplementary material for Figure 3 Additional 2D images from X-ray CT acquisition.
Supa Horizontal slice through a coarse depth filter. Supb Horizontal slice through a medium depth filter. Supc Horizontal slice through a fine depth filter.
a b
c d
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e f
Supplementary material for Figure 5 2D images of each grade using different pixel sizes
in identical locations. Supa Full depth imaging of a fine grade. Supb Internal imaging of a fine grade. Supc Full depth imaging of a medium grade. Supd Internal imaging of a medium grade. Supe Full depth imaging of a coarse grade. Supf Internal imaging of a coarse grade.
a b
c D
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Supplementary material for Figure 6 Additional triple phase tomography images for
other grades. Supa Medium depth filter grade before segmentation. Supb Medium depth filter grade following segmentation. Supc Fine depth filter grade before segmentation.
Supd Fine depth filter grade following segmentation.
Supplementary material for figure 7 3D render of a thin slice through Figure 7B.
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