World Federation of Neurology

In the report (1962) of the study meeting on projections and nomenclature of the Problem Commission on Neuroradiology of the World Federation of Neurology (Milan, June, 1961) you describe the postero-anterior (inclined) projection of the skull as follows: “The forehead and nose touch the film, the median sagittal plane being perpendicular to the films. The orbito-meatal plane is also perpendicular to the film. The central ray is directed cranio-caudally to form an angle of 15 deg. with this plane (or about 25 deg. to the anthropological plane).”