Source of Support: None, Conflict of Interest: None
Different systems for intracavitary applications of radioactive sources have been initiated at the beginning century. Based on the clinical experience, rules have been proposed related to the geometry of the application, to the relative source activities and to the dose and volume specifications. It has been opportune to reconsider dose and volume specification because radium is progressively replaced by gamma-ray emitting substitutes for which the old systems are not always suitable. Furthermore SI units should be used and computers are routinely used for calculations. ICRU has published recommendations on Dose and Volume specification for reporting Intracavitary therapy in gynecology. ICRU recommendations are presented regarding the description of the technique used, the total reference air karma, the description of the reference volume, the absorbed dose at reference points and the time dose pattern.