Fig. 1

The top images correspond to patient 1, a 17 months-old girl. The lower images correspond to patient 2, a seven months-old boy. A1 and A2 shows thoracic computed tomography (TCT) images. The EIT images B1 and B2 are divided into four ROIs based on the electrodes placed on the monitoring belt. The color scale of the EIT corresponds to the tidal volume variation present at the different ROIs; dark blue corresponds to a lower ventilation variation, and white corresponds to high tidal volumes. TCT of patient 1 had minimal ground-glass opacities close to the right pleural effusion, probably related to a restrictive atelectatic component. Absence of other focal pulmonary opacities suggestive of a parenchymal infectious process. The EIT demonstrated the usual ventilatory distribution profile. TCT of patient 2 had ground-glass pulmonary opacities in the left lung, mainly in the lingula and lower lobe, which may represent a viral inflammatory/infectious process in the clinical context presented, although there is a possibly contributing hypoexpansion component for the frosted glass appearance. There are no alveolar consolidations. There was also a slight accumulation of secretion inside some bronchi in the left lung base. The EIT of this patient, who showed decreased ventilation in the left lung, was consistent with the TCT findings