Patent ID: 8579821

Claim:
A method comprising: acquiring color Doppler data associated with a pulse repetition frequency (f PRF ); detecting a first area of the color Doppler data representing a zero color Doppler value; detecting a second area of the color Doppler data adjacent to the first area and representing non-zero color Doppler values in a first direction; detecting a first transition between the second area and a third area of the color Doppler data adjacent to the second area and representing non-zero color Doppler values in a second direction opposite the first direction; determining whether the absolute difference between color Doppler values of the second area and the third area at the first transition is more than a preset value; in response to a determination that the absolute difference between color Doppler values of the second area and the third area at the first transition is more than the preset value, subtracting a color Doppler value corresponding to a Doppler shift frequency of f PRF from each of the color Doppler values of the third area if the second direction is positive; and in response to the determination that the absolute difference between color Doppler values of the second area and the third area at the first transition is more than the preset value, adding the color Doppler values corresponding to a Doppler shift frequency of f PRF to each of the color Doppler values of the third area if the second direction is negative.