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Dosimetry plans of various techniques. Radiation dosage across various tissues compared among (A) IMRT, (B) PBT, and (C) IMPT. IMPT, intensity-modulated proton beam therapy; IMRT, intensity-modulated radiation therapy; PBT, proton beam therapy. Reproduced with permission from Trofimov A et al, Int J Radiat Oncol Biol Phys. 2007;69:444–453.
