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CONVOLUTION - SUPERPOSITION
D
(
r
)
Calc point
k
(
r
-
s
)
s s r s s
r
3
d
k
T
D
V
3D Terma distribution
calculated using equivalent
path length
s
Multiply by density
at interaction point
Use equivalent path length
for kernel lookup
Inhomogeneous media
Slide from Dr. James Bedford
ESTRO physics course, June 2017
(
(r-s)’