Permanent radioactive seed implants are a form of radiation therapy for prostate cancer. The implants remain in place permanently, and become biologically inert (inactive) after about 10 months. This technique allows a high dose of radiation to be delivered to the prostate with limited damage to surrounding tissues.Click to see full answer. Moreover, what is a radioactive implant used for?Radioactive implants (metal wires, seeds or tubes) may be used to treat cancer in areas of the body where they can be placed inside the body without surgery (such as the vagina). Sometimes surgery is used to place an implant near the cancer. In some cases, tiny implants may be left inside the body permanently.Also, is it safe to be around someone who has had radiation? Some cancer patients who receive radiation therapy worry that their bodies will become “radioactive” after they receive radiation treatment. Their concern is that close physical contact with others could expose them to radiation. The general answer to this concern is that physical contact is fine. Additionally, how long are you radioactive after brachytherapy? No radiation remains in your body after temporary brachytherapy, so there is no risk to others. Some LDR, PDR and HDR treatments require one or more days in the hospital and may cause discomfort. This may be due to the catheters or applicators and having to stay relatively still for a prolonged period.What are the side effects of seed implants for prostate cancer? Peeing more often. Strong urges to pee. Burning when you pee. Not able to completely empty your bladder. Impotence.