Advanced Physics for Brachytherapy 2018

The problem …

• Let us start from the simplest case (point isotopic monoenergetic photon source in infinite medium of given composition) • If I know everything there is to know about the source and the medium, can I calculate dose at a point i …?

i

prR or the rate energy radiant the calculate can i activity intial from r over t, energy radiant

prR

from

Ψ point, any at fluence energy calculate can i R

= pr

exp(

−



)ir

i

2 ir 4π

Ψ) ρ μ (=T

point, any at TERMA the calculate can i Ψ from

i

i

pr

i

particles charged of TERMA of fraction the calculate also can i energy kinetic to ed transferr is that

ρ enμ (= prK

μ enμ



point, any at KERMA

( prΨ) =

prΤ)

i

i

i