COVID-19 pneumonia: A review of typical radiological characteristics

Table 4 Adapted from Vetrugno et al[39] proposal of lung ultrasonography score system in coronavirus disease 2019

Class	Score	Definition
A	0 point	Normal aeration pattern. Presence of A lines, pleural sliding, and ≤ 3 well-spaced B lines
B1	1 point	More than 3 B lines per intercostal space
B2	2 points	Confluent B lines (with or without small consolidations). This pattern corresponds to the presence of GGO on chest CT scan
C	3 points	Large consolidations, parenchymal hepatization (with or without air bronchogram)

CT: Computed tomography; GGO: Ground-glass opacity.