[Mandatory calibration of dosimeters used in radiotherapy].

In the Federal Republic of Germany, therapy level dosimeters have been subjected to mandatory verification since January 1st, 1983. This paper informs of the legal foundations and the numerous regulations, which must be observed in particular by the manufacturers and users of these dosimeters. Moreover, the paper reports on the actual state of the pattern approvals of therapy level dosimeters, the experiences gained and the results of the verifications until November 1st, 1985. The appendix contains a survey of the patterns of therapy level dosimeters accepted up to now and their complementary devices.