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Comparison of IMPT and VMAT dose distributions. IMPT (left) and VMAT (right) plans with isodose line plans (right). Isodose lines: green: 5640 cGy; orange: 4320 cGy. Abbreviations: cGy, centigray; IMPT, intensity-modulated proton therapy; VMAT, volumetric-modulated arc therapy. Reproduced with permission from Chen et al [13].
