Radiation therapy makes use of targeted energy, this energy is similar to X-rays, and they kill cancer cells, shrink tumors, while providing relief from specific cancer-related symptoms. Radiation can be used as an alternative treatment in men who are suffering from early stages of prostate cancer; especially if cancer has not spread to other parts of the body. It can also be used in a combination with surgery to ensure that all the infected tissues are eliminated. Radiation oncologists will make use of a variety of tools and therapies to deliver radiation doses to tumors and ensure minimum damage to healthy tissues and organs. When radiation is focused directly on tumors then they can reduce the risk of side effects as well. There is a range of radiation therapy that includes external beam radiation, stereotactic body radiation, and so on.