IMRT Course 2016

Kernel-based methods: The TERMA concept

), (

sE

µ

( ) , r

prim

r

) , ( sE E

sET =

Φ⋅ ⋅

primary photon source

r

)(

s

ρ

raytracing through beam modulating elements, fluence scaled by 1/s 2

mass attenuation coefficient

primary fluence

TERMA: T otal E nergy R eleased per MA ss

all energy released at s through physical interactions of the primary photon with the medium: photons, electrons, (positrons)

s

r

Neglected in most commercial dose calc. algorithms

ESTRO IMRT course 2016 Dose Calculation in Static and Rotational IMRT London April 7th, 2016

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