Comparative analysis of despeckling filters for continuous wave Doppler images

Purpose The problems of speckle noise, low contrast, and other artifacts in continuous wave Doppler (CWD) based echocardiographic images are identical to the issues prevailing in the B-mode images. The median filter and Gaussian low pass filter are more commonly used for reduction of noise in CWD images. The applications of state-of-the-art despeckling filters and their impact on delineation are not extensively analyzed using CW Doppler images.