Abstract
A method for eliminating abnormal blood flow velocities in an ultrasonic imaging system is provided in present invention. The method comprises: receiving signals of blood flow; pre-processing the received signals to generate velocity signs in real time; obtaining a plurality of the velocity signs in a predefined spatial and temporal order, and performing weighted smoothing on the plurality of the velocity signs; determining the direction of blood flow at the pixel to be confirmed according to result of the weighted smoothing. A module for performing above method and a color flow imaging system with such a module are also provided in present invention. The method and apparatus provided by present invention can judge the practical direction of blood flow intelligently by performing spatial-temporal smoothing only on the signs of blood flow velocities, so that the estimation error caused by the system noise, clutter residue, speckle effect and etc. can be corrected.
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