Fig. 2

The lung ultrasound score (LUS) can be applied to assess the loss of aeration by dividing the thorax into 12 specific regions, six on the right and six on the left in supine or prone position assign each region a score from 0 (normal lung) to 3 (lung consolidation). Anterior, lateral, and posterior fields are identified by sternum, anterior, and posterior axillary lines. The entire examination can be performed without any change in patient’s position. Score: 0 = normal aeration (A-lines and lung sliding or maximum 2 well-spaced B-lines); score 1 = moderate loss of aeration (> = 3 well-spaced B-lines with lung sliding, coalescent B-lines/subpleural consolidations occupying < 50% of the pleural line); score 2 = severe loss of aeration (> = 3 well-spaced B-lines with lung sliding, coalescent B-lines/subpleural consolidations occupying clearly > 50% of the pleural line); score 3 = complete loss of aeration: lobar/hemilobar consolidation with predominant tissue like pattern