[Contributions of radiology to surgery. A history older than a century]

The discovery of X rays was immediately highly valued by all the surgeons. At its beginnings, radiology only allowed to objectivize the lesions of the bones and to localize the radio-opaque foreign bodies. WWI materialized this synergy and after the conflict every hospital had to have a radiological department. By slow and progressive technological advances, radiology managed to visualize other organs. The two world wars generated new methods permitting the diagnosis of otherwise unsuspected lesions. Finally, after the demonstration of the anatomy, radiological research started to investigate the function of the organs. A brief look of the major steps of this collaboration shall be topic of this talk.