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[[File:Glossary Icon-2.png|100px|frameless|right|link=ICRP Glossary]]
The equivalent dose in an organ or tissue is given by:
<math>
H_T = \displaystyle \sum_{R} w_RD_{R,T}
</math>
where D<submath>D_{R,T}</submath> is the mean absorbed dose from radiation <math>R </math> in a tissue or organ <math>T</math>, and w<submath>Rw_R</submath> is the radiation weighting factor. The SI unit of equivalent dose is joule per kilogram (J/kg<sup>-1</sup>), and its special name is sievert (Sv). ([[ICRP Publication 123]], 2013)
'''Return to [[ICRP Glossary|Glossary]]'''
See also the ICRPaedia entry on [[Absorbed,_Equivalent,_and_Effective_Dose|absorbed, equivalent, and effective dose]].
== Previous glossary entries ==
=== from [[ICRP Publication 130]], 2015 ===
The equivalent dose to a tissue or organ is deο¬ned as:
<math>
H_T = \displaystyle \sum_{R} w_RD_{R,T}
</math>
where <math>w_R</math> is the radiation weighting factor for radiation type <math>R</math>, and <math>D_{R,T}</math> is the organ absorbed dose from radiation type <math>R</math> in a tissue or organ <math>r_T</math> of the Reference Adult Male or the Reference Adult Female. As <math>w_R</math> is dimensionless, the SI unit for the equivalent dose is the same as for absorbed dose, J kg<sup>-1</sup>, and its special name is sievert (Sv).
=== from [[ICRP Publication 133]], 2016 ===
The equivalent dose to a tissue or organ is deο¬ned as:
<math>
H_T = \displaystyle \sum_{R} w_RD_{R,T}
</math>