Dose-Deescalated 3-Fraction Stereotactic Body Radiotherapy For Centrally Located Lung Cancer

This study is testing whether delivering radiation therapy in 3 larger doses (stereotactic body radiotherapy) instead of the standard number of sessions can safely and effectively treat centrally located lung tumors near major airways or blood vessels. **You may be eligible if...** - You have a lung tumor that is 5 cm or smaller - The tumor is centrally located (near major airways, blood vessels, the esophagus, or the heart) - You are scheduled for stereotactic body radiotherapy (SBRT) **You may NOT be eligible if...** - Your tumor is larger than 5 cm - Your tumor is not centrally located near critical structures - You cannot tolerate the required radiation dose constraints Talk to your doctor to see if this trial is right for you.