Methods: The first part of the study is a register-based study of lung cancer patients' road to diagnosis, based on a database of newly diagnosed cancer patients in a year. Second part of the study is a clinical, randomized study of the effect of referral directly to fast chest CT scan. Primary endpoint is delay, secondary endpoints are referral pattern (use of fast-track packet), primary use of CT and 1-year mortality. Furthermore side effects, including patient groups with increased delay.