Table 1.

LUS score, corresponding image, and description of image.

LUS Score	0	1	2	3
Corresponding image
Description of images	Physiological A-lines (upper image) One or two B-lines per intercostal space (marked with yellow arrows) with smooth pleural line (lower image)	More than two B-lines per intercostal space with irregular or thickened pleura	Coalescent/confluent B-lines (upper image)/‘white lung’ or small subpleural consolidations (<1 cm—lower image)	Large consolidations (>1 cm) ± air bronchogram—the image is from a newborn not include in the study with bacterial pneumonia