Fig. 10From: Settings and artefacts relevant for Doppler ultrasound in large vessel vasculitisMirror artefact. The pleura is a smooth surface with air behind that may act as an acoustic mirror. Left: The subclavian artery (SA) is seen with the pleura as a white line (p) below. Right: The SA is mirrored below the pleura. The clavicle (c) is seen casting an acoustic shadowBack to article page