1. A method for processing radiography images comprising: determine from a three-dimensional modelling a three-dimensional model known as the masked model which features a calcified element and an implanted element, but not a vascular element; determine a three-dimensional model known as the subtracted model, which features the vascular elements alone; merging the two models, weighting their voxels so as to increase the contrast between the images of the masked model and the images of the subtracted model; and summing the voxels thus weighted.