the radiation that irradiated the prostrate tissue over time.
The treatemnt advised is 'Brachytherapy', where tiny radioactive seeds will be placed / inserted within the prostate tissue by the specialist. So, this is a type of 'internal' radiation treatment. These seeds will deliver radiation to the cancer tissue whilst being placed within the prostate. The procedure can be temporary (giving higher dose of radiation over shorter duration) or permanent (giving low radiation doses over a longer period of time). This type of treatment is usually advised in cases of not very aggressively spreading cancers.