Figure 5
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 IPF 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 = 0.298, P = 0.036). (B) FEV1 (% of predicted) is positively correlated with apico-basal displacement of the diaphragm (r = 0.284, P = 0.046). (C,D) Correlation between forced vital capacity after the administration of bronchodilator (Post-bronchodilator FVC) and displacement of the diaphragm. (C) Post-bronchodilator FVC (% of predicted) is positively correlated with 3D displacement of the diaphragm (r = 0.347, P = 0.028). (D) Post-bronchodilator FVC (% of predicted) is positively correlated with apico-basal displacement of the diaphragm (r = 0.337, P = 0.033).
