Abstract: The present invention relates to a method for automatic tracking of a body comprising the steps of defining (step 11) several sets of templates, each set comprising a plurality of templates consisting of areas selected from a 2D image of the body, relating (step 12) each template set to a body coordinate system (26), acquiring (step 14) at least two images (21-25) representing different views of the body at one given moment in time, and for each image associating (step 15) the image with at least one of said template sets, locating (step 16) each template in this template set in the image, and calculating a preliminary position of said body coordinate system (26) in space, and using a geometrical relationship between said views to combine said preliminary positions, thereby reducing uncertainties in the position of the body coordinate system in space. Thus, several “preliminary” BCS orientations are combined to generate a final BCS orientation.