Fig 1. Representative lung ultrasound images used for scoring.

0 Normal pattern with horizontal reverberation of the pleural line (also known as A lines). 1 Vertical hyperechoic artifacts (also known as B lines) more than 3 per field, well spaced. Thin, regular pleural image. 2 Coalescent B lines, thick pleural image with or without small subpleural consolidations. 3 Thick and irregular pleural image with evident subpleural consolidations1.