ESTRO course Dose Modelling and Verification 2017

Head scatter model parameterization example

Scat ter component

Model

Model parameters

Flatten ing filter sca tter

Triangular source distribution

c

and c

0

1

Collimator scatter

Scat ter kernel integration around the field edge

None

k

Backscatter to monito r

Moni tor's eye view factors of i rradiated block areas

Backscatter coefficient

b

S 3 parameters

The parameters are determined by fitting measured S c (OF air

) to calculations!

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