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. Author manuscript; available in PMC: 2015 Apr 1.
Published in final edited form as: IEEE J Biomed Health Inform. 2014 Jun 4;19(2):648–659. doi: 10.1109/JBHI.2014.2328870

Fig. 5.

Fig. 5

Histogram of lung voxel intensities from one chest CT scan of the LIDC datasets. Each bar corresponds to the frequency of observing voxels having intensity within a specific range. Statistically, the observed distribution can be decomposed into four normal-tailed Gaussian mixtures as represented by the four bell-shaped curves.