Brachytherapy is also called internal radiotherapy, implant therapy or seed implantation. The type of brachytherapy that may be used to treat locally advanced prostate cancer is known as high-dose rate (HDR) brachytherapy. It’s usually given with a course of external-beam radiotherapy.
HDR brachytherapy involves placing thin, metal or plastic tubes into the prostate gland. A radioactive material is left in the tubes for a set period of time, and then withdrawn. After the treatment, the tubes are removed and no radioactive material is left in the prostate gland.