Sonography of the normal lung: Comparison between young and elderly subjects

Abstract

The majority of the elderly subjects did not have A-lines, and B-lines were observed in a high percentage. The reduction of impedance between lung parenchyma and soft tissues of the chest wall and the increased thickness of interlobular septa might explain these results. © 2014 Wiley Periodicals, Inc. J Clin Ultrasound 43:230-234, 2015.