Advanced Physics for Brachytherapy 2018

TG-43 1D Formalism

2

0       r r

g r

( ) ( ) r 

( ) D r S

= 

K

P

an

dose rate to water at point P(r, q)

( ) D r

S

air kerma strength

K

dose rate constant



1/ r 2

geometry function ( point-source approximation )

g

( r )

radial dose function

P

( r )

1D anisotropy function

 an

Rivard, et al., Med. Phys. 31, 633-674 (2004)