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. 2011 Mar 1;14(1):22–27. doi: 10.1016/j.jus.2011.01.004

Fig. 1.

Fig. 1

Transthoracic ultrasound scan in healthy subjects (supine position). a) Subcostal scan shows “comet-tail” artifacts (arrows) beyond the diaphragmatic line. b) Parasternal scan in a different subject shows “ring-down” artifacts (arrows).