Advanced Physics for Brachytherapy 2018

The method …

• It is more efficient to use MC to calculate and fit an analytical expression

) , ( 1h  r

sc

i



1 )( 1

r





) ,(

sc dR

r



) ,( 1h =

=

exp(

−



) , 1 



=

sc

sc

, sc en r 

1

2

dV R sc

1 R sc

dr 

1



1 )( 1

sc dR

=

exp(

−



) , 1 



=

sc

, 1 sc en r 



2

i

dr en 

1(

−

)



θ

B

) rb

exp(

−





=

2

r

r

where:



1 )( 1

sc dR

B

=



 , 1 sc en d en







1(

−

)



b

=



sc



 , 1

• What material should I choose for the calculation of h…?