2602-2603 / 3107
AAA
Analytical Anisotropic Algorithm
( )
( ) ( )
rdkdk rdk
r
d
,
,
⋅
=
1. Obtain
depth
component
k
d
(
d
) by lateral
integration at
each depth
2. Apply lateral
component
using sum of
exponentials
( )
r
i
i
i
r
i
e c
rdk
µ
µ
−
=
∑
=
6
1
1
,
A. Van Esch et al. Testing of the analytical anisotropic algorithm for photon
dose calculation. Med. Phys. 33:4130-4148 (2006)
Improvement of the pencil beam concept to reduce errors in
heterogeneous media