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Fig. 2A —Distribution of voxel attenuations within representative
renal volume. Histograms of renal volume attenuations without lower threshold
(A) or with lower threshold (B). Both sets of data were
analyzed, even though differences are relatively small. Smoothing is ±
10. For A and B, respectively, mean total volume for entire
object without cut planes was 162.10 and 156.46 cm3; mean
attenuation ± SD, 116.0 ± 67.5 and 122.0 ± 61.0 HU;
minimum, –144.0 and –20.0 HU; maximum, 308.0 and 308.0 HU.
