Units of Radiation Exposure and Dose
|Exposure||Electric charge is a measure of the amount of ionisation caused by a beam of radiation passing through the air, and the total electric charge formed in a given mass of air is called exposure. Measured in coulombs per kilogram.|
|Absorbed dose||The amount of energy transferred to irradiated material (J/Kg). Measured in Grays (1 Gray = 1 J/Kg) [large amount, tend to use milligrays]|
|Dose Equivalent|| Absorbed dose weighted for the type of radiation used. Dose Equivalent (Sv) = Absorbed dose (Gy) x Quality Factor.|
Tells you how damaging the radiation is.
|Effective Dose|| A further adjustment based on the radiosensitivity of various tissues.|
Effective Dose (Sv) = Dose Equivalent x Weighting Factor
Doesn't take age into account - tissues are more sensitive when younger as they are still growing.