Advanced Physics for Brachytherapy 2018

TLD: intrinsic energy dependence

D

Q TLD

)0( )0( QMQ TLDD QM ) ( ) (

k

QQ rel

)0 , ( =

bq

rel

k

is in the order of 0.90 ± 0.05 to 0.935 ± 0.03 for I-125 and Pd-103

•

bq

• This correction appears to be protocol and TLD make specific.

• A correction might be needed for HE sources as well (Joint AAPM-ESTRO report suggests k

1 = rel bq

) but for Ir-192 Carlsson et al. (Med. but with increased uncertainties

rel

Phys. 39(2), 1133. 2012) suggests

k

=

95.0

bq

(3.5%, k=1).