Prospective Study of Intensity-Modulated Proton Therapy (IMPT) for Small Cell Lung Cancer

This study is examining a specialized radiation therapy technique called intensity-modulated proton therapy (IMPT) in patients with small cell lung cancer. Proton therapy is a type of radiation that delivers energy more precisely to tumors and may cause fewer side effects than standard X-ray radiation. Researchers want to understand how well it works and what side effects it causes. **You may be eligible if:** - You have been diagnosed with small cell lung cancer (either limited or extensive stage) - Your doctor is recommending chest radiation using proton therapy - You are 18 years or older **You may NOT be eligible if:** - You have had prior radiation therapy that would overlap significantly with the new treatment area - You are pregnant Talk to your doctor to see if this trial is right for you.