Pulsed doppler flow mapping apparatus

摘要

A pulsed Doppler imaging system is shown in which velocity of a fluid is attained by multiplying the quadrature samples of the reflections of one burst with the conjugate of the quadrature samples of the reflections of a previous burst for a number of pairs of equally spaced bursts, deriving the angle represented by the real and imaginary components of each multiplication and averaging the angles to attain an angle that is used in determining the velocity of the fluid in the sample volume from which the reflections are sampled.