A method of tracking position and velocity of objects borders in two or three dimensional digital images, particularly in echographic images comprises the steps of: Acquiring a sequence of at least two consecutive ultrasound image frames of a moving tissue or a moving object which frames are timely separated by a certain time interval Automatically or manually defining a certain number of reference points of a border of a moving tissue or object at least on a first image frame of the sequence of image frames acquired Automatically tracking the border of the moving tissue or object in the at least one further following frame by determining the new position of the reference points of the border in at least one following image frame of the sequence of image frames by estimating the position of the said reference points in the said at least following image frame of the sequence of image frames on the basis of the ultrasound image data of the acquired sequence of image frames.In the present invention the sequence of image frames acquired is a sequence of consecutive B-mode, grey scale ultrasound images On a first frame a border line is drawn either manually or by means of an automatic border detection algorithm. The original trace of pixels of the manually or automatically drawn border line is followed in time, i.e. in at least one following image frame by searching the maximum likelihood of the trace of pixels in the following image frame with the trace of pixels in the first or timely previous image frame by analyzing the image pixels in the neighbourhood of the said trace of pixels.
