Device for checking the irradiation dose measuring circuits used to measure the irradiation doses delivered by a radiotherapy apparatus

摘要

Device making it possible to check, prior to or after each irradiation treatment session, the proper operation of the dose-measuring systems associated with a radiotherapy apparatus and comprising at least one dose- measuring circuit equipped with a counter system of preselect design. This device comprises a pulse generator G, means for applying said pulses to the counter system of at least one of the measuring circuits and means making it possible to halt the generator G and reset the counter system to zero when coincidence occurs between the preselected number of pulses corresponding to a preselected dose level D and the displayed number of pulses corresponding to the dose level effectively delivered by an irradiation source S.