CPB Ljubljana 2018 course book

Dose calculation – AAPM-TG43: S K

and 

The product of the actual source strength S K and the dose rate constant Λ of the source and radionuclide considered is the actual dose rate at 1 cm radial distance at θ = θ 0 = 90 0 .

0 )= (1cm, 90 0 )

(r

, θ

0

r

= 1cm

0

Λ is expressed in units of cGy.h -1 .U -1 and 1U = 1 µGy.m².h -1 = 1 cGy.cm².h -1 Dose rate is in cGy.h -1