Patent ID: 8545411

Claim:
An ultrasound system, comprising: an ultrasound data acquisition device configured to transmit and receive ultrasound signals to and from a target object to thereby output a plurality of ultrasound data for obtaining a color Doppler mode image, wherein the target object includes at least one of a tissue and a blood flow; and a processor placed in communication with the ultrasound data acquisition device and being configured to locate the plurality of ultrasound data on a complex plane, the processor being further configured to perform a circle fitting upon the plurality of ultrasound data located on the complex plane to thereby set circumferences corresponding to the plurality of ultrasound data, detect center points of the circumferences, analyze the detected center points and determine whether the detected center points are located on a same position as an origin of the complex plane to thereby form determination information and perform a downmixing and a clutter filtering upon the circle-fitted ultrasound data in consideration of speed of the tissue based on the determination information, wherein the ultrasound data comprise in-phase/quadrature data.