1245 / 1778
Mathematical Description / Repair Function
➢
External beam radiotherapy and HDR brachytherapy :
no repair during irradiation (min)
repair function
g = 1
➢
LDR, MDR brachytherapy :
repair during irradiation (hours - days) is significant
(
)
−
− =
−
t
e
t
MDR
LDR g
t
1
1
2
,
21
T
2
ln
=
… repair rate
T
1/2
… half time for repair
t … irradiation time
2
T
1/2
4 6 8 Time [h]
. . .
2
T
1/2
4 6 8 Time [h]