(1) A person's biological status in relation to his radiation exposure within the limits of maximum permissible doses is assumed to be determined by the Dose Equivalent (DE), formerly known as RBE Dose, and by the particular tissues irradiated.
(2) The Dose Equivalent is the product of absorbed dose and any necessary modifying factors, amongst which is the Quality Factor (QF), values of which are
... [Show full abstract] given by ICRP for radiation of a given LET.
(3) QF is a special case of RBE appropriate to permissible doses and is assumed to depend solely on LET. The conventional value at a given LET is assumed to apply to all tissues with the single exception of the lens of the eye.
(4) The rem is the unit of dose equivalent; it is not a unit of biological effect.
(5) The state of an individual following exposure corresponding to a given Dose Equivalent is deemed to be the same as if the same tissues had been irradiated with a numerically equal absorbed dose of hard X or gamma radiation.
(6) Doses greater than the maximum permissible can not be converted into rems.