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. Author manuscript; available in PMC: 2010 Dec 1.
Published in final edited form as: Ultrasound Med Biol. 2009 Oct 24;35(12):2042–2054. doi: 10.1016/j.ultrasmedbio.2009.06.1096

Fig. 2.

Fig. 2

Principle of operation of a three-gate 20 MHz pulsed Doppler for sensing blood velocity and wall motion.