Source-based brachytherapy is a special treatment technique in radiotherapy that delivers a high dose of radiation to the target volume with encapsulated radioactive sources placed at a short distance from the target. The radioactive source is either implanted in the target tissue directly or placed at distances of the order of a few millimeters from the target tissue. Accurate knowledge of the source strength is one of the most important parameters in brachytherapy. The brachytherapy source strength is measured by using well-type ionization chamber.

Well-type ionization chambers are typically used for brachytherapy dosimetry. We provide calibrations for well-type ionization chambers and electrometers in terms of reference air kerma rate, for Low Dose Rate Brachytherapy (LDRBT) – 137Cs sources and for High Dose Rate Brachytherapy (HDRBT) – 60Co and 192Ir sources.