Fig. 4
From: Lung ultrasound—a primary survey of the acutely dyspneic patient
Vertical artifacts in LUS. a Lung comet (thin arrows) or I-lines arising from the pleural line (thick arrows) as seen with a high-frequency transducer at 8.5 MHz. b Static reverberation artifacts or Z-lines (dotted arrows) within the SLF are weak images with no relationship with the pleural line (thick arrow) and fades with depth. c A strong ring-down artifact or B-line (asterisk) starts from the pleural line (thick arrow) and reaches the depths without fading. It also swings side to side with lung sliding