Figure 8.

Gas and tissue volume in 10 apex-base levels. Apex-base distribution of gas (white) or tissue (gray for the right lung, black for the left lung) volumes, normalized for the body surface area (BSA); each lung was divided into 10 apex-base segments of equal height along the sterno-vertebral axis. Apex-base levels with the same number were merged (that is, all of the segments level 1, level 2, level 3, etc.), in order to obtain 10 regions for each lung and then a quantitative analysis was performed).