IMRT

Kernel-based methods: Energy deposition point kernel 6 MeV Photon

The point kernel - also called point spread function (PSF)- summarizes energy deposition of all physical interaction processes: • pre-calculation e.g. with Monte Carlo dose calculation in water • parameterization for efficient use

s

r



) s rE h srE h  

(

)

(

water

water

, ,

,

=

−

homogeneous medium (water) → symmetrical PSF!

ESTRO IMRT course 2015 Dose Calculation in Static and Rotational IMRT Brussels October 8th, 2015

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