Figure 4
From: CT-derived 3D-diaphragm motion in emphysema and IPF compared to normal subjects
Correlation between pulmonary function test variables and magnitude of displacement vectors in emphysema patients. (A,B) Correlation between forced expiratory volume in 1 s (FEV1 [% of predicted]) and displacement of the diaphragm. (A) FEV1 (% of predicted) is positively correlated with 3D displacement of the diaphragm (r = 0.398, P = 0.005). (B) FEV1 (% of predicted) is positively correlated with apico-basal displacement of the diaphragm (r = 0.44, P = 0.002). (C,D) Correlation between FEV1 / forced vital capacity (FVC) (%) and displacement of the diaphragm. (C) FEV1/FVC (%) is positively correlated with 3D displacement of the diaphragm (r = 0.462, P = 0.001). (D) FEV1/FVC (%) is positively correlated with apico-basal displacement of the diaphragm (r = 0.499, P = 0.0003).
