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Scat ter component
Flatten ing filter sca tter
Collimator scatter
Backscatter to monito r
Model
Triangular source
distribution
Scat ter kernel integration
around the field edge
Moni tor's eye view factors
of i rradiated block areas
Model parameters
None
Backscatter coefficient
Head scatter model parameterization example
S
3
parameters
k
b
c
0
and
c
1
The parameters are determined by fitting measured
S
c
(OF
air
) to calculations!