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AAA
Analytical Anisotropic Algorithm
Expansion of the pencil beam to
reduce errors in heterogeneous media
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
6
1
1
,
Van Esch et al. Testing of the analytical anisotropic algorithm for photon
dose calculation. Med. Phys. 33:4130-4148 (2006)
Slide from Dr. James Bedford
ESTRO physics
course, June 2017