Radiation therapy for cervical cancer includes external and intracavitary irradiation. Radical external irradiation is usually performed for about 5 weeks, 5 times a week, once a day, with Saturday and Sunday off. Each radiation treatment may last a few minutes, less than 10 minutes in duration. Patients should hold their urine before external irradiation, empty their rectum as much as possible, lie prone on the treatment bed as much as possible, put on a body wrap and fix their position, and then irradiate. Intracorporeal irradiation is usually performed during external irradiation, approximately once a week, with approximately 4-5 intracorporeal irradiation sessions depending on the patient’s condition. Radiotherapy is administered using radioisotopes, and the approximate duration of intracavitary treatment is determined by the decay time of the radioisotopes. However, intracavitary irradiation takes about one morning for the patient, because the patient has to be vaginally filled and then irradiated.