This trial is testing a new treatment planning method for patients with lung cancer who will be treated with radiation therapy. This new method is called Computed Tomography (CT) ventilation imaging. It aims to help protect the healthiest parts of patient's lungs from being injured by the radiation therapy. The investigators will determine whether healthy lung sparing can improve the quality of life in these patients.

For more information about VITaL visit: https://image-x.sydney.edu.au/the-vital-clinical-trial/