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T
0
T
0
Tt
0 t t
)t t(
0
e1 )t, ,r(D e1
1
)t, ,r(D dt
e)t, ,r(D ) ,r(D
0
0
Dose from Dose-Rate
TG-43 derives the Initial Dose Rate
t
0
:
is the time of the begin of the treatment
= T
1/2
/ ln2
, the mean lifetime of the Radionuclide,
= 1 /
T
1/2
:
is the half-life of the Radionuclide
T:
is the duration of the Treatment (placement of the source)