Patent ID: 8147412

Claim:
A method for generating dealiased Doppler signals in a medical ultrasound spectral Doppler system, comprising the steps of: directly filtering each of two separated baseband quadrature components of obtained quadrature Doppler signals without zero insertion by using at least four filters in at least four parallel branches respectively so as to output eight signals, wherein the at least four filters for each separated baseband quadrature component are equally divided into two groups, and outputs of each group of the filters are to be used for Doppler signals processing in one of forward and reverse directions, and coefficients of the different filters in each group can be interleaved with each other to form coefficients of a desired filter; interleaving and accumulating the output eight signals, according to direction and quadrature component of the output Doppler signals, to obtain forward and reverse dealiased Doppler signals F(t) and R(t).