Figure 7. Lobar and gravitational dependency of regional volume change (V/V₀) .

A, lobar dependency. Each lobe expanded differently with lung inflation (P < 0.0001). The right lower lobe inflated the most, while the right middle lobe inflated the least. RLL, right lower lobe; RUL, right upper lobe; RML, right middle lobe. B, gravitational dependency. The three gravitational regions (non‐dependent, middle and dependent) expanded differently with lung inflation (P < 0.0001). The non‐dependent part inflated the least, while the dependent part inflated the most. The error bars correspond to the standard deviation over seven subjects.