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3. Higher order of scatter
Instead of using h
1sc
with S
1sc
obtained from
D
prim
, to obtain D
1sc
couldn’t I distribute S
1sc
due to ALL orders of scattering
in a single step
i diff
k l i h ?
us ng a erent erne , .e.
msc
…
I could, but it is NOT a good idea due to:
•
h
msc
reducing less than h
1sc
with r
ray artefacts
•
accuracy close to boundaries of finite
geometries (discussed in the following)
Figures from: Carlsson & Ahnesjö Phys. Med. Biol. 45 357 (2000)