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Calculation object approximations
Pencil beam kernel
Calculation
point
•
ρ
0
Primary
deposition
volume
•
z
The depth (
z
) is generally assumed
to be constant within the lateral
integration plane during calculation
of the scatter dose to a point.
Calculation
point
•
ρ
0
Primary
deposition
volume
•
z
Scatter overestimated
Calculation
point
•
ρ
0
Primary
deposition
volume
•
z
Scatter underestimated
Errors cancel (roughly)
Calculation
point
•
ρ
0
Primary
deposition
volume
•
z