Fig. 1

Typical lung ultrasound patterns. Normal pleural line (yellow arrowheads) and A-lines (red arrows) (Panel A); two separate B-lines (red arrows) and fragmented pleural line (yellow arrowheads) (Panel B); confluent B-lines (red asterisks) and blurred and irregular pleural line (yellow arrowheads) (Panel C); sonographic white lung (delineated with red dotted line) (Panel D)