Figure 3.

Distribution of differently aerated lung volumes. Individual curves for eight animals before (solid line) and after (dashed line) a recruitment maneuver. Multi-slice CT of the whole lung with characterization of lung parenchyma according to Hounsfield units at end-expiration. V_HYP, volume of hyperinflated lung parenchyma; V_NON, volume of nonaerated lung parenchyma; V_NORM, volume of normally aerated lung parenchyma; V_POOR, volume of poorly aerated lung parenchyma.