Quantitative flow measurements with Doppler ultrasound: techniques, accuracy, and limitations.
Using Doppler ultrasound, blood-filled structures appearing on a real-time ultrasound image may be interrogated for flow information. Quantitation of the Doppler signal may yield estimates of instantaneous and time-averaged velocity, volume flow rate, and pressure difference. In this article, the techniques of signal analysis used are discussed, together with the sources of error that confront their clinical application.
D001783:Blood Flow Velocity; D001811:Blood Volume Determination / Q000379:methods*; D004301:Doppler Effect; D006439:Hemodynamics; D006801:Humans; D014463:Ultrasonography / Q000295:instrumentation / Q000379:methods