Radiation therapy uses high energy rays to kill cancer cells, this has several side effects such as hair loss in the treated area, irritated skin, tiredness/weakness and more. Advances in all types of treatment will improve doctors' ability to combine chemotherapy, radiation therapy and surgery to treat all stages of lung cancer. All forms of cancer are treated most successfully in the early stages, which has increased interest in screening patients. for lung cancer before it causes symptoms. Advances in imaging techniques, such as low-dose helical CT, are currently being researched and could help find better ways to diagnose lung cancer early. Genetic testing is also underway to find out which people have a higher risk of lung cancer