IMRT Course 2016

2636-2637 / 2953

Kernel-based methods:
The TERMA concept
primary photon source ( ) ) , (
)(
), (
, sE E
s
sE
sET prim r
r
r Φ⋅ ⋅ =
ρ
µ
mass attenuation
coefficient
primary fluence
raytracing through beam
modulating elements,
fluence scaled by 1/s2
TERMA:
Total Energy Released per MAss
ESTRO IMRT course 2016
Dose Calculation in Static and Rotational IMRT
London April 7th, 2016 -26-
s
r
all energy released at s through
physical interactions of the
primary photon with the medium:
photons, electrons, (positrons)
Neglected in most commercial
dose calc. algorithms