Carbon Ion Therapy for Peripheral Non-small Cell Lung Cancer

This study is testing carbon ion therapy — a precise type of radiation — for people with early-stage non-small cell lung cancer located away from major airways and blood vessels, who are unable or unwilling to have surgery. **You may be eligible if...** - You are between 18 and 80 years old - You have confirmed early-stage non-small cell lung cancer (stage Ia–IIa) that has not spread to lymph nodes or other organs - Your tumor is far enough from the esophagus, main airway, spinal cord, heart, and large blood vessels - You are medically unable to have surgery, or you have chosen not to have surgery - Your blood counts, lung, liver, and kidney function meet the required levels **You may NOT be eligible if...** - You have more than one primary tumor - Your cancer has spread to other parts of the body - Your general health is too poor to tolerate radiation treatment Talk to your doctor to see if this trial is right for you.