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Fig. 1G —74-year-old woman with multifocal air trapping. Attenuation
difference histogram of entire right lung shows peak pixel frequency of 5.0%,
mean attenuation difference of 151.4 H, and SD of 141.0 H. Color scale ranges
from 0 H (dark blue to black) to 366 H (bright
orange to yellow), with black for all values less than 0 H and
white for all values greater than 366 H, both of which are thought to be due
to misregistration, incomplete segmentation, or both.
