Fig. 2

Lung ultrasound scores determined by the number of B lines and subpleural consolidation. A Normal aeration with 0–2 B lines, score = 0, B a small loss of aeration with ≥ 3 B lines, score = 1, C a moderate loss of aeration with multiple coalescent B lines or small subpleural consolidation, score = 2, and D a severe loss of aeration with consolidation or large subpleural consolidation, score = 3. (The yellow letters in the picture are the markings made in the trial. R and L represent the right and left hemithorax, and the numbers represent the subdivisions.)