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Axial comparison of an IMPT plan (left) vs. IMRT plan (right) of 50 Gy delivered in 20 daily fractions for a 71-year-old female with locally-advanced NSCLC. A gross tumor volume (GTV) is defined in red. Esophagus is defined in blue. Heart is defined in pink. IMPT, intensity-modulated proton therapy; IMRT, intensity-modulated radiation therapy; NSCLC, non-small cell lung cancer.
