Fig. 3

EIT data and LUS score at each points in time. H0: Transferred to ICU. H1: Prone position for 6 h. H2: iNO application for 6 h. H3: Transferred out of ICU. EIT, electrical impedance tomography; LUS, lung ultrasound score. CoV, center of ventilation; LHI, lung heterogeneity index; GI, global inhomogeneity index