isodose chart /ī′sədōs/ [Gk, isos + doss, giving, charta, paper] , a graphic representation of the distribution of radiation in a medium in which lines are drawn through points receiving equal doses. Isodose charts are determined for x-rays traversing the body, for radium applicators used in intracavitary or interstitial treatment, and for working areas where x-rays or radionuclides are used.
