In this type of radiation therapy the radiation source is applied by means of a liquid (as a drink), a capsule (capsules that are swallowed) or intravenously (injected into the vein). Therefore as opposed to external and internal radiation therapy, in a systemic radiation therapy the radiation source travels throughout the body of the patient. After the radioactive material has been administered you will have to stay in hospital in a special room for several days until the high-levels of radiation diminish. Radioactive material may leave the body through body fluids such as saliva, sweat and urine and so these fluids may be radioactive. Therefore certain precautions and procedures are usually taken for individuals (such as nurses, physicians and visitors) who can come in contact with the patient. This type of treatment can sometimes be given on an outpatient basis.