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(a) Conventional hepatic CT image. (b–d) Corresponding images selectively display (b) fine, (c) medium and (d) coarse texture obtained by using values for image filtration [spatial scale filter value (or sigma)] of 0.5 [width, 2 pixels (1.68 mm)], 1.5 [width, 6 pixels (5.04 mm)] and 2.5 [width, 12 pixels (10.08 mm)], respectively. Images should be viewed in the online format. Reproduced from Miles et al18 with permission from the Radiological Society of North America.
