what is long term results on radiation seed implant
NCI Dictionary of Cancer Terms Internal radiation therapy (brachytherapy) is a type of radiation that. is given inside the body. Radioactive seed implant is a kind of internal. radiation that can be used to treat prostate cancer. This treatment uses. tiny âseedsâ that are made of titanium and contain a radioactive material. The seeds are about the size of a grain of rice and are placed directly. into the prostate. What to Expect.