Fig. 9
From: Introduction to neonatologist-performed echocardiography
Continuous-wave (CW) and pulsed-wave (PW) Doppler. Signal sampling and aliasing (see text for details). Adapted from Rovner A. The principle of ultrasound— ECHOpedia 2017. Available from: http://www.echopedia.org/wiki/The_principle_of_ultrasound
