922 / 1228
Radiochromic films: rel. E response
)0(
)0(
) (
) (
)0 , (
Q TLDDQwD
Q TLDDQwD
QQ rel f
)0( )0(
) ( ) (
)0 , (
QMQ TLDD
QMQ TLDD QQ rel
bqk
•
Arjomandy et al (2010) found the relative sensitivity of EBT2 relatively small
(within k=1 uncert. 4.5%) from MV to 75kV
p
•
Brown et al (2012) used synchrotron mono chromatic x rays and found up to
-
-
3% dose under-response (
) at low E (25-35 keV)
•
Bekerat et al (2014) indicate no relative energy dependence of EBT3 films
97.0
rel
bqk rel f
between Ir-192 and Co-60 (albeit for 3cm film-source distance in a parallel-
opposed Ir-192 HDR irradiation setup)
•
The same authors report an over response (
) of about 16%
±
4% and an
1
rel k rel f
under response (
) of about 27%
±
4% for EBT3 irradiated in x-ray
beams of average energies about 40 keV and 20 keV, respectively, relative to Co-
6
bq
1
rel
bqk rel f
0.
0 5% type A
.
positioning
Pictures from: Aldelaijan et al, Med. Phys. 38, 6074 (2011)