This session will focus on treatment of early stage non-small cell lung cancer. In particular, surgical data will be discussed and compared to emerging data on SBRT. Technical aspect of SBRT delivery including immobilization, image-guidance and motion control will also be discussed. At the conclusion of this activity, the learner will be able to do the following: 1. Discuss treatment options for early stage non-small cell lung cancer including surgery versus SBRT. 2. Summarize data supporting SBRT for early stage non-small cell lung cancer. 3. Explain the technical aspect of SBRT delivery.