Figure1: Lung ultrasound findings of normal lung and pneumonia in neonates: a. Normal lung b. Mild pulmonary consolidation (mild pneumonia): the consolidation extent was limited to the pleural line, involving only one intercostal space; c. Moderate pulmonary consolidation (mild pneumonia): the consolidation involved 2-3 intercostal spaces. d. Extensive lung consolidation (severe pneumonia): involving more than three intercostal spaces.