507 / 1359
( ) ( )
rad
water 0
1
d
z
z
z
z z
=
( )
( )
(
)
0
w
0
rad
d
0
rad
S
d
w
0
d e
CF =
e
d e
z
z
z
t t
z
t
z z
z z
z
z
z
−
−
−
−
=
calculation techniques:
Common approach for heterogeneity handling:
primary dose,
use PK primary dose data for the depth
z
rad
:
scatter dose,
apply a 1D convolution derived correction factor
:
A Ahnesjö et al (1992)
Med Phys
19, 263-273
This is the methods used for PK kernel in (at least) Oncentra