Fig. 3From: A demonstration of high field-of-view stability in hands-free echocardiographyDetection of A-lines for frame exclusion. a A representative image of a parasternal long axis image (AO=aorta, L=left, R=right, A=atrium, V=ventricle and IVS=interventricular septum), and b the absence of A-lines in its reconstruction. c A frame in which the lung is blocking the ultrasound waves, and d portraying the detected A-linesBack to article page