Advanced Physics for Brachytherapy 2018

) ( QD

Phantom correction

ww

,

p

=

phant

) ( Q D

, phant w

• increases with distance due to increased density and increased attenuation from %Ca content • There might also be a minor θ dependence p phant

I-125 / SW

Table from: Luxton, Med. Phys. 21(5), 631 (1994) Figure from: Moutsatsos et al. Brachytherapy, 13(6), 618 (2014)