[Concept of isoeffective doses in radiotherapy]

The authors proposed the use of absorbed doses in standard regimens of irradiation to illustrate end-effects of unconventional variations of radiation therapy. They proposed that such doses should be defined as "biological isoeffective doses under standard conditions of radiation therapy" or, in short, "standard isoeffective doses". Three standard regimens of irradiation were described: separately for beta-beam, for continuous interstitial and fractional intracavitary radiotherapy. It was proposed that a standard isoeffective dose value should be expressed in "isogray" abbreviated as (i) Gy.