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Analytical proton dose calculation
•
, ,
=
× , ,
•
I(d) is integral depth dose
•
LAT(x,y,d) is lateral dose profile
•
Lateral has two components
➢
Multiple Coulomb Scattering (1
st
and 2
nd
Gaussian)
➢
Nuclear Interaction (Halo) due to large angle inelastic nuclear fragments
(3
rd
Gaussian)
➢
Usually multiple sub-PB
depth d
Li Med Phys 2012