693 / 1359
For each voxel
⋅
, ,
,
= −
, ,
,
( )
+
=0
−
+
′
′
→ , ,
′ ,
′
No. of discrete angles: 32 – 512
No. of energy intervals: 25 for photons, 49 for electrons
∆ =
ΔΩ
2
1 −
−
c.f. collapsed cone:
energy scattered
into the direction
fraction scattered
out of the direction