Fig. 1From: Focused cardiopulmonary ultrasound for assessment of dyspnea in a resource-limited settingExample of B-lines. The pleural line (horizontal arrow) is identified as an echogenic line noted about 0.5-cm deep and perpendicular to the rib shadowing (vertical arrows). The comet-tail or ring-down artifacts (arrow heads) begin at the pleural line and extend to the edge of the imageBack to article page