Figure 2.

A schematic of the extracted lung and diaphragm measures at both full lung capacity (A) and at reduced lung capacity (B). At full lung capacity (i.e., end inspiration) the diaphragm length (DIA) is the length across the diaphragmatic dome from the anterior to the posterior chest wall margin, while at sub-maximal lung capacity (i.e., part inspiration) the full DIA is computed as the length over the diaphragmatic dome plus the lengths along the zones of apposition, without changing the points of attachment of the diaphragm at the anterior and posterior chest wall margins. The total distance of motion (TDM) of the diaphragm is computed as the sum of the ANT, CNT, and PST lengths. The cross-sectional area (CSA) is the area inside the lung contour (coloured yellow).