Selective three-dimensional X-ray method using two-dimensional X-ray images taken at two different energies to represent the bone structure of a patient

In order to represent the bone structure of the body of a patient, tomodensitometry data is acquired along the same orientations, but with different irradiation energgy levels. Within each view the irradiations at these two energy levels are compared in order to deduce a set of images in two-dimensional projection representing the bone structure alone. With this aim, within the images in projection, to each image element is attributed a value corresponding to the thickness of bone traversed by an x-ray which has terminated at this image element. Next the bone structures and the vascular structures are represented in a combined way. The bone structures are shown with a lesser contrast, in such a way as to permit, by transparency, a vascular network to be seen. This lets the practitioner who is looking at the reconstructed angiography images to orient himself in space, taking account of the skeleton of the patient.