My sister had a lung exray in the start of her diagnosis of cancer of tonsils in Feb 2002. It had metasticized to one lymph node on right side. She had radiation for 6 weeks twice daily(ended on Apr 27, 2002) and was checked just last week and was told that she was cancer free. Of course she has to be checked again in 3 months. I don't think they did an exray on her lungs last week. Should they? And is an exray and ct scan the same?