Radiation-Induced Cardiac Disease

The study will measure serum Pro-N-Cadherin and NT-proBNP (pro B-type natriuretic peptide) levels in adults with non-small cell lung cancer receiving hypofractionated radiation therapy and evaluate whether these biomarkers correlate with radiation dose to the heart, cardiac dysfunction, and adverse cardiac events. Participants will undergo blood collection and echocardiography over a two-year follow-up period.