IMRT Course 2016

Kernel-based methods: Energy deposition point kernel

Photon

6 MeV

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

s

r

• parameterization for efficient use

(

)

(

) s rE h srE h r r

water

water

rr

=

−

, ,

,

homogeneous medium (water)

symmetrical PSF!

→

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

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