“External radiation uses a machine that directs high-energy rays from outside the body into the tumor and some nearby normal tissue.” (American Cancer Society p. 5) After this treatment the patient will not be radioactive, but the treatment is given in small doses and can last several weeks. “Internal radiation therapy, or brachytherapy, uses a radioactive source, called an implant, that is inserted into the body in or near the tumor.” (American Cancer Society p. 9) It can be placed in an organ or in the cancerous tumor. The patient will be radioactive for a short time. Because the implant is close to the source of the cancer, a higher dose can be given to the patient. “Systemic radiation uses radioactive drugs to treat some types of cancer.” (American Cancer Society page 12) The drugs used are called radiopharmaceuticals and can be administered orally or intravenously. “They gather where the cancer is to emit their radiation and kill the cancer cells.” (American Cancer Society p. 12) After this treatment the patient will be radioactive and will take a few days to be removed from the patients