Advanced Physics for Brachytherapy 2018
The method
➢ Up to now, our set of equations is EXACT but we need to separate r from E to solve it iteratively
P
gpq
,
ˆ
rg
rg gt
, )ˆ,(
) = + = + ( 1 4 , )ˆ,( pr r p g scat q −
)1(
l
G
=
m
scat q
rg
)( rg gls −
r gml
)( Y
)ˆ,( , =
) ,(
)2(
' ,,
' , ,
l
l
1 l m g = '
0
−=
gE −
gE −
1 1'
dE dE Er E Erl
,(,
→
' )' ,( )
s
' E rg gls = − )( g
gE
)3(
' ,,
gE −
1
dEEr
) ,(
gE
gE −
gE −
1
1
r gml
dEEr
' )ˆ( )ˆ, ,( l Y Er
dE d m
)(
=
) ,( =
)4(
ml
, ,
,
4
gE
gE
gE −
1
dE Er Ert
' ) ' ,( ) ,(
gE
rgt
)( , =
)5(
gE −
1
dEEr
) ,(
gE
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