Airway Analysis
To create an airway segment:
Click Diagnose on the menu bar.
Click Airway 
.
Indicate two landmarks to create a box surrounding the region of interest.
To adjust the box, click and drag one of the corner control points.
To start over, click Reindicate landmarks 
.
Click Done. The airway is visualized.
The airway volume and the most narrowing area are visualized in the 3D patient workspace. In the reslice viewers the airway model is visualized as a yellow outline. In the 3D viewer, you will see a colored volume. The color of the 3D object is dependent on the segmented volume for each plane perpendicular to the airway curvature.
Notes
On the SmartPanel Annotation tab, you can hide or show the visualization. To change the color, click 
and select Edit color.
When clipping the 3D model, all the objects except the airway model are clipped.