[Direct radiographic magnification: a contribution to the study of bone pathology].

Direct magnification radiography was evaluated on 46 patients with skeletal disorders. The equipment employed was based on a microfocus tube and it gave a magnification factor of 3 X. This technique was judged to be more useful than standard X-ray films in 35/46 cases (76%). The size of the part examined played an important role in the effectiveness of this technique, since the most useful and impressive results were obtained in thin anatomic sites, like the extremities. The highest value of direct magnification radiography was found to be in uraemic osteodistrophy, in particular for the study of the hands. This technique appeared to be very useful also in bone tumours, since it allowed a detailed evaluation of the trabecular structure and of the cortical outline.