Engineering
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The sievert (symbol: Sv) is the SI derived unit of dose equivalent.

Details[]

It attempts to reflect the biological effects of radiation as opposed to the physical aspects, which are characterised by the absorbed dose, measured in gray.

How measured[]

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.

Measurement[]

In terms of SI base units:

1 Sv = 1 J/kg = 1

SI multiples and conversions[]

Frequently used SI multiples are the millisievert (1 mSv = 10−3 Sv) and microsievert (1 µSv = 10−6 Sv).

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