Figure 1.

A-C, Example of commercial software for airway tree segmentation. A, CT scan airway tree segmentation generated using VIDA Vision Software (VIDA Diagnostics, Inc.) showing the segmented and labeled airway tree. A path to the subsegment of interest (RB1_b) is highlighted in blue. B, Curved planar reconstructions of the airway path to the subsegment of interest. C, Orthogonal segmentation of the airway lumen and airway outer wall. Segmentation of the lumen and outer wall can produce numerous quantitative measurements, such as the lumen and outer wall area or diameter, as well as the airway wall area or thickness.