Figure 1

Scheme of the bronchus and the parameters measured in HRCT: D - external diameter, L - internal (luminal) diameter, WT - wall thickness, A O - total airway area, AL - luminal area, WA - wall area.
Scheme of the bronchus and the parameters measured in HRCT: D - external diameter, L - internal (luminal) diameter, WT - wall thickness, A O - total airway area, AL - luminal area, WA - wall area.