L0_2016_Athens_Physics_Programme_V6

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Modeling of Complex Physical Processes
 Kernel based models
(convolution/superposition)
 Physics models
 Monte Carlo
 Grid-based Boltzmann Solvers
 Model Parameters
 Finite source size
 Angular distribution of photons
 Primary transmission
 Extra focal radiation mainly from the
primary collimation and the field
flattening filter
 Differential hardening of the beam by
the field
 Flattening filter
 Curved leave ends
 Leaf configuration
 Tongue and groove effect
 Leaf transmission
 Electron contamination
 Tissue heterogeneities
 …
Adapted from AAPM presentation External Beam Photon Dose Calculations by T.R. Mackie