1. A method of processing an image of an object, the method comprising: shifting an X-ray tube on a path relative to the object; emitting with the X-ray tube, for different places along the path of the tube, X-rays that cross the object in a multiplicity of directions of emission; detecting, using an X-ray detector situated opposite the X-ray tube relative to the object, pieces of X-ray image data for each of the directions of emission; producing at least one standard projection image of the object from the X-ray image data; locating, in the at least one standard projection image, presumed suspect zones which are represented by 2D markers; reconstructing the at least one standard projection image to create a digital volume; locating, in the digital volume, 3D markers to facilitate the detention of the presumed suspect zones; and re-projecting the 3D markers in the at least one standard projection image.