Finally, a comparison can be performed between mammograms of the same breast but taken at different time intervals. Thus, with such technique, radiologists can evaluate how a suspicious region has evolved. Sanjay-Gopal et al. [] first identify regions of interest on the most recent mammogram. Subsequently, the nipple location is used to align mammograms and locate the segmented region in the previous mammogram. Vujovic and Brzakovic [] proposed an algorithm for identifying the potential control points (for instance, crossing points) and establishing the correspondence between them. Using a similar methodology, Martí et al. [,] extracted salient control points from internal linear structures in order to establish the correspondence. The latter provides a more robust approach to the extraction of control points using features such as orientation and width of the structures, instead of just their positions.