Recently, there are difficulties in operating brachtherapy machine in the radiotherapy department because of increasing the source price with decreasing nuclear reactor in the world. The development and technical features of the Ir-192 HDR sources (4.5 mm, 1.1 mm in diameter) in Korea were described in this report. We expect that this report will be helpful for hospitals to make the long-term plan for operating and managing HDR brachytherapy machine.

KeywordsIr-192 source, Brachytherapy, Radioisotope