RT Book, Section A1 Rengan, Ramesh A1 Stripp, Diana C. A1 Glatstein, Eli A2 Boyiadzis, Michael M. A2 Frame, James N. A2 Kohler, David R. A2 Fojo, Tito SR Print(0) ID 1128367878 T1 Radiation Complications T2 Hematology-Oncology Therapy, 2e YR 2016 FD 2016 PB McGraw-Hill Education PP New York, NY SN 9780071637893 LK hemonc.mhmedical.com/content.aspx?aid=1128367878 RD 2024/04/24 AB The ultimate determinant of the efficacy of any anticancer therapy is the therapeutic ratio. The therapeutic ratio for a given dose of radiation therapy (RT) is defined as the ratio of the tumor control rate to the observed normal tissue toxicity. The larger this ratio is, the better tolerated the treatment is at any given dose. Indeed, the “definitive” therapeutic dose for most solid tumors has been determined by the clinically observed radiotolerance of the surrounding normal tissues, not the dose required for tumor sterilization. Therefore, with an understanding of acute and chronic toxicities of radiation, one can potentially improve the therapeutic ratio through effective intervention