640 / 1609
Dose from Dose-Rate
TG-43 derives the Initial Dose Rate: T <<
τ
This is e.g. the case for HDR or PDR treatments with
192
Ir
or HDR treatments with
60
Co
T = dwell time
!
k
u
:
is a units conversion factor to convert the dose rate expressed
in cGy h
-1
and considering the time unit of the value T to the
desired dose unit, Gy or cGy.
T
0
e1 )t, ,r(D) ,r(D