Abstract: A computer-implemented denoising method for removing artefacts from a doppler-type ultrasound video includes: acquiring a plurality (n) of frames composing an ultrasound video; identifying pixels containing doppler activation; generating for each frame, a first set of image data to associate to each pixel position of the corresponding frame at least a first or a second category to categorize the pixels of the corresponding frame and identifying for each frame the pixels containing doppler activation; generating at least a persistence sequence associated to a frame portion containing identification data ordered according to the frame sequence such that adjacent identification data in the sequence refers to consecutive frames; in the persistence sequence, calculating the length of each persistence sub-sequence comprising consecutive identification data having the first value; automatically calculating a reference threshold; eliminating the doppler pixels if the latter belong to a persistence sequence below the

Abstract: A computer based method for classifying a mass of an organ such as a cyst is provided. The computer based method provides a class indicating a presence of a serum and a solid in the cyst and a subclass indicating a presence of one or more serous loculi or one or more solid. loculi in the cyst. The computer based method is advantageous applications for a diagnosis of ovarian cysts.