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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