In an ultrasound imaging system, the mean velocity of a fluid flow, variance of velocity of the fluid flow and energy value of Doppler ultrasound signals from the flow in response to transmitted ultrasound are first estimated from autocorrelation values of the signals to form a set of parameters for...http://www.google.com/patents/US5609155?utm_source=gb-gplus-sharePatent US5609155 - Energy weighted parameter spatial/temporal filter
