886 / 1224
•
Bekerat et al (2014) indicate different marketed versions of EBT3 and report:
•
no relative energy dependence of the latest EBT3 between Ir-192 and Co-60
(albeit for 3cm film-source distance in a parallel-opposed Ir-192 HDR irradiation
setup)
•
an under response (
) at all energies <100 keV, varying from 20%
±
4%
at 20 keV to
±
4% at 40 keV.
Radiochromic films: rel. E response
)0(
)0(
) (
) (
)0 , (
Q TLDDQwD
Q TLDDQwD
rel f
=
1
rel
bq
k
rel f
)0( )0(
) ( )
(
)0 , (
QMQ TLDD
QM
Q TLDD
QQ rel
bq
k
=
Figure from: Bekerat et al, Medical Physics 41(2) 022101 (2014)