Course book Advanced Treatment Planning 2018

Analytical proton dose calculation

depth d

, ,

=

× , ,

•

• 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

Li Med Phys 2012