Brachytherapy, also known as internal radiation therapy, is a technique where pellets of radioactive materials are placed directly into the prostate via a special needle. Low dose or high dose radioactive materials may be used depending on the patient’s conditions and the surgeon’s preference. Low dose materials are left in place where as high dose materials are removed after a few minutes of treatment. Brachytherapy is often combined with external beam radiation given at a lower dose. During brachytherapy as most of the radiation is concentrated at the prostate itself, it spares the adjacent tissues from damage.