Advanced Physics for Brachytherapy 2018

The method …is ready! (and it’s convolution/superposition)

• I can calculate D

@ any point from any

1sc

point, e.g.:

 

1

1

i

=

S jρ i R jρ

=

jh 1sc,i

1sc,i S

θ),ir-jrh( dV iρ =

1scD

i

→ j

jρ

θ r

 

ρ

-r

=

dVθ) ,ir-jrh(

1sc,i

j

i

j

and the total dose to j would be:

iρ

=

1sc,i S

dV

 V

1scD j

jh

jρ

BUT…: 1. I need to be efficient (reduce the # of the N 6 evaluations required) & work with finite voxels 2. I need to account for inhomogeneities 3. I need to account for higher order of scatter (D 2sc , D 3sc , …, D msc ) 4. I need to work with real sources 5. I need to account for finite patient dimensions