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Encyclopedia > Equivalent dose

The equivalent dose is a measure of the radiation dose to tissue where an attempt has been made to allow for the different relative biological effect of different types of radiation. Equivalent dose is therefore a less fundamental quantity than radiation absorbed dose, but is more biologically significant. Equivalent dose has units of sieverts.

Equivalent dose (E) is calculated by treating the absobed dose (D) with a radiation type dependent quality factor (Q):

E = DQ

where Q is 1 for x-rays, gamma-rays and beta-particles, but higher for protons, neutrons, alpha particles etc. Results from FactBites:

 Sievert - Wikipedia, the free encyclopedia (540 words) The sievert (symbol: Sv) is the SI derived unit of dose equivalent. The equivalent dose to a tissue is found by multiplying the absorbed dose, in grays, by a dimensionless "quality factor" Q, dependent upon radiation type, and by another dimensionless factor N, dependent on all other pertinent factors. The collective dose that a population is exposed to is measured in "man-sieverts" (man.Sv).
 Equivalent dose - definition of Equivalent dose in Encyclopedia (121 words) The equivalent dose is a measure of the radiation dose to tissue where an attempt has been made to allow for the different relative biological effect of different types of radiation. Equivalent dose is therefore a less fundamental quantity than radiation absorbed dose, but is more biologically significant. Equivalent dose (E) is calculated by treating the absobed dose (D) with a radiation type dependent quality factor (Q):
More results at FactBites »

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