Advanced Physics for Brachytherapy 2018

TLD: intrinsic energy dependence

D

Q TLD

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

k

QQ rel

)0 , ( =

bq

rel

1

k

Davis et al.

down to 0.9 (0.6 % Type A uncertainty,

•

bq

k =1, x-ray beams, LiF:Mg,Ti).

rel

k

bq

rel

k

Nunn et al.

down to 0.885 (3.5% combined standard

•

bq

uncertainty, k =1, x-ray beams, LiF:Mg,Ti).

• down to 0.935 (1.9% combined standard uncertaintiy, k =1, x-ray beams, LiF:Mg,Ti). They also discussed potential differences due to TLD handling and formulation, and expressed concern regarding the applicability of determinations obtained using x-ray beams to other photon fields. • Reed et al. = 0.883 ± 0.011 (I-125), 0.870 ± 0.012 (I-125 w. Ag), 0.871 ± 0.013 (Pd-103) (combined standard uncertainties, k =1 LiF:Mg,Ti). • Rodriquez and Rogers minimized the difference between Λ measurements in the literature and MC calculations and arrived at = 0.931 ± 0.013 (I-125) and 0.922 ± 0.022 (Pd-103). rel bq k rel bq k Carlsson Tedgren et al. k bq

Figure from: Nunn et al, Med. Phys. 38(8) 1859 (2008)

1

rel

k

bq

Figure from: Carlsson Tedgren et al, Med. Phys. 38(10) 3839 (2011)