[On the meaningful filing period for x-ray films (author's transl)]

A total of 19,577 x-ray films made from 5,092 patients was examined, subdivided into 94 different kinds of examination. The following observations were made: The time since the last x-ray examination of the patient up to Jan. 6 1973 was less than 2 years in 30.1% and less than 5 years in 63.8% of the patients. These figures are due to the fact that the hospital is still very young. The period between two successive x-ray examinations was less than 2 years in 88.2% and less than 5 years in 95.8% of the patients. It is obviously not necessary to file roentgenographs for more than 5 years, since after that time only 4.2% of the patients return for a follow-up examination, and only a fraction of these can probably be regarded as really remarkable (Brolin).