Figure 1.

Comparison of lung segmentation methods applied to a CT scan of a lung with IPF. (a) Coronal slice of the CT scan. (b) Region growing segmentation result. (c) Model-based segmentation result. (d) Difference volume between the segmentations in (b) and (c); arrows indicate components corresponding to (A) leak into colon and (B) lung tissue affected by IPF. (e) Result of the fusion approach in which component (A) is rejected and component (B) is accepted.