The reduction in ID for PT may be significant for younger patients with a longer life expectancy, as there is evidence of a reduced risk of secondary cancer induction when using PT as compared to xRT [ 22 , 46 ].
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An In Silico Feasibility Study of Dose-Escalated Hypofractionated Proton Therapy for Rectal Cancer.
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Planning studies have identified reduced doses to the bladder, femoral heads, and bowel bag as possibly significant advantages of PT over xRT [ 23 , 24 , 25 ] for rectal cancer.