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Radiant energy transport along a transport line
l
Analytical raytrace of kernel exponential through a voxel
constitutes a transport step of the radiant energy:
out
( )
R
=
l
attenuation of
in
e
a
R
−
⋅
l
radiant energy contribution from the
(
)
1 e
a
k
a
−
+ −
l
out
R
in
R
20
• Performed separately for primary and scatter dose
incoming energy voxel considering intravoxel attenuation
Energy deposited inside the voxel (appr.
a
.
R
) becomes
the
deposited dose
• Parameter
a
from kernel parameterization and is scaled to
represent the voxel medium,
k
stems from incident beam
energy release (coll KERMA and SCERMA) and medium