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Committed dose

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The irradiation of tissue or organs with incorporated radionuclides is distributed over the incorporation period. This period depends on the physical half-life and the biokinetic behaviour of the radionuclide. The committed dose is equal to the time integral of the dose rate in a tissue or organ over the time. The integration period for calculation of the committed dose amounts to 50 years for adults and to 70 years for children.

The organ committed dose HT() for an incorporation at the time t0 is the time integral of the organ dose rate in the tissue or organ T:

where HT(t) is the average organ dose rate in the tissue or organ T at the time t period in years over which the integration is effected. If no value is indicated for t, a period of 50 years for adults and the period from the respective age to the age of 70 years for children are taken as a basis.

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