425 / 1245
20
Radiant energy transport along a transport line
• Performed separately for primary and scatter dose
Analytical raytrace of kernel exponential through a voxel
constitutes a transport step of the radiant energy:
out
( )
R
attenuation of
incoming energy
in
e
a
R
radiant energy contribution from the
voxel considering intravoxel attenuation
2
1 e
a
k
a
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
out
R
in
R