COVID-19 pneumonia: A review of typical radiological characteristics

Table 3 Common ultrasound findings in coronavirus disease 2019

B pattern: Presence of multifocal and separated B-lines (“waterfall sign”) or confluent B-lines (“white lung”). The distribution is predominantly posteroinferior and bilateral, and varies depending on the severity of the disease

Patchy involvement: Pathological areas of lung parenchyma alternating with well-aerated and preserved areas

Thickening or interruption of pleural line, and reduced pleural sliding

Small subpleural consolidations in any region of the lung, more common at bases. Less frequently, larger consolidations may be found, with or without dynamic air bronchogram

Decrease in blood flow (within doppler mode) related to subpleural consolidations

Small or absent pleural effusion