Radiation treatment for lung cancer is performed to patients in order to handle the growth of cancer cells as well as reduce the effects of lung cancer itself. Radiation treatment by using a high radiation level is purposed to destroy cancer cells and reduce the size of tumor. Almost half of the patients with cancer are suggested to undergo radiation treatment as the medication. Patients with a further stage of cancer are also suggested to do radiation treatment as well. Not to heal the disease but to reduce the symptoms. However, there are side effects of radiation treatment.