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2. inhomogeneities
Medium can be of varying density
What changes…?
Our basic equation already accounts for:
•
Density @ scatter release voxel
•
Density @ energy absorption voxel
The kernel also changes …!
V
dVjh
1sc,i
S
j
ρ
iρ
= 1scD
j
2
)
exp(
, 1
)
, 1
exp(
2
1
)
1(
)( 1
, 1
)
, 1
exp(
2
1
1
)( 1
1
) ,(
) ,( 1h
r
rb
B
sc en r
sc
dr en
sc dR
sc en r
sc
dr
R sc
sc dR
dV R sc
r
r sc
−
=
−
−
=
−
=
=
, 1
, 1
1
)
1(
)( 1
sc
b
sc en d en
sc dR
B
=
−
=