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Electron beam calculations

(e.g. Oncentra Monte Carlo electrons)

24

Measure fluence profiles in air with removed applicator, field

settings varied with the photon collimators

Optimize source phase space parameters to fit measured

profiles

Generate source phase space electrons and propagate

them with the photon collimators at preset values and the

applicator mounted (no insert) to the exit phase space

Source

phase

space

Beam characterization

Utrecht 2016

Parameterize the exit phase space

Exit

phase

space

Generate exit phase space electrons, discard those who

stem from areas blocked by the insert

Add collimator scatter electrons and treatment head photons

Propagate the generated particles into the patient

Run time calculations