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1. I need to be efficient
Δr
1
1
2
D D
D
1sc2 1sc1 2 1sc2 2
S ρ
S
[1 exp(
)][1 exp(
2)]
{ Δr [1 exp(
Δr )}
1sc,1 1
1sc,2
1
2
2
ρ
Δr
2
2
2
B
b r
b r
b
b
B
b
b r
b
b
=
+
=
→ →
− − −
−
− − −
+
θ
Overall, exiting voxel 2:
Δr
2
Equations for the transport of scerma
generated at each point along a
transport line
Under the collapsed cone approximation:
•
Scerma does not vary with θ within ΔΩ
(Bθ, bθ constant along transport line)
and scerma generated, emitted and
absorbed along transport line
and assuming:
•
Scerma generated per unit r is constant
within the same voxel (scerma does not
vary considerably within voxels)
θ