[National survey on radiodiagnosis. Comparative analysis of the activity of different sectors (3)].

The survey has estimated the global annual production of radiological procedures in France (1982) at 45,4 millions. The large public hospitals (including University hospitals) produce up to 42% of the total; the mean number of annual procedures by X-Ray unit being 4 000, in this sector. The private sector (including clinics and offices) has a production ratio between 2 350 and 2 800 annual procedures by X-Ray Unit; some type of examinations are over represented as compared with the public sector for example lumbar and dorsal spine and digestive. Specialized procedures such as vascular and neuro-radiological represent a quasi monopoly of the public sector. In term of economic behavior, some differences appear between the public and private sectors in the way to account for the procedures to the Social Security System. These are partly due to differences in the complexity of the procedures (for example in the case of abdomen, stomach and upper G.I., the latter being more often performed in hospitals) and to different medical practices (number of films; utilisation of divided films, etc.). The share of procedures executed under the responsibility of a radiologist yields 88% of the total.