Goals of Radiation Therapy Cure To eradicate the disease ■Control Control the growth and the spread of the cancer ■Prophylaxis(预防) To control microscopic disease Palliation To reduce complications or symptoms of the cancer.May be used to control pain.Goals of Radiation Therapy ◼ Cure ◼ To eradicate the disease ◼ Control ◼ Control the growth and the spread of the cancer ◼ Prophylaxis（预防） ◼ To control microscopic disease ◼ Palliation ◼ To reduce complications or symptoms of the cancer. May be used to control pain