Аннотация:Ultrasonic color Doppler flow image unwrapping algorithm that uses cross-frame connection is proposed and compared with other unwrapping methods. An original complex phase preliminary filtration is used to suppress a false-aliasing artifact and to improve the results. Flow variances are used as weight coefficients in the minimization energy function. For the comparison a test data series is constructed. It uses an anatomic 3D left ventricle region model for the simulation of the blood flow. Experiments show that cross-frame weights significantly improve the quality of unwrapping.