Fig. 4From: Influence of lung aeration on diaphragmatic contractility during a spontaneous breathing trial: an ultrasound studyComparison of the DTF between patients with LUS < 14 and those with LUSs ≥ 14. Measurements were performed after 30 min of a SBT. DTF, diaphragmatic thickening fraction; LUS, lung ultrasound aeration score; a right DTF; b left DTF. The left DTF was not visualized in 2 patientsBack to article page