Fig. 2From: High-dose Intensity-modulated proton therapy versus Standard-dose Intensity-modulated RadIation therapy for esophageal squamous cell carcinoma (HI-SIRI): study protocol for a randomized controlled clinical trialExample of IMRT versus IMPT plan of the mid thoracic esophageal cancer T3N2M0. (A) IMRT plan 50 Gy in 25 fractions (blue isodose line) and (B) IMPT plan 60 Gy in 30 fractions (green isodose line) Back to article page