Abstract: The disclosure relates to a brachytherapy system. The brachytherapy system comprises a radiation generation apparatus for generating x-ray radiation, a controller for controlling the radiation generation apparatus, an applicator, which is embodied in such a way that it can be placed on the radiation generation apparatus, and an information transmission system, which is configured to capture an information item embodied in or at the applicator if the applicator has been placed on the radiation generation apparatus and to transmit the captured information item to the controller. The controller is configured to control the generation of x-ray radiation and the output of warnings on the basis of the received information item.