A method determining the Doppler angle in pulsed Doppler flowmeters

At present, the most important problem of the ultrasonic Doppler blood flow measurement is Doppler angle, i.e., the angle between the flow vector and the sound beam direction. A method is proposed which uses identification of two successive echos in the analysis. It is found that the method provides a secure basis for the measurement of the Doppler angle, since the accuracy of the measurement is high.