586 / 1245
Transport of primary photon fluence
•
Point source of primary photons at
•
No electron transport
•
Outscattering = attenuation
•
No inscattering
03/01/13
⋅
, ,
,
= −
, ,
,
( ) +
, ,
Ԧ ,
Ԧ, Ԧ
, ,
( Ԧ) =
, ,
Ԧ ,
Ԧ, Ԧ
4 Ԧ − Ԧ
2
− Ԧ− Ԧ
Ԧ
⋅
, ,
,
= −
, ,
,
( ) +
′
න
4
′
න
∞
′
′
, ,
′
,
′
′
→ , ,
′
,
′
; ,
+
, ,