Dose Course 2018_Flipping book

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Electron beam calculations - Monaco

Beam characterization

• Measure fluence profiles in air with removed applicator, field settings varied with the photon collimators

Source phase space

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Optimize source phase space parameters to fit measured profiles

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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

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Parameterize the exit phase space

Run time calculations

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Generate exit phase space electrons, discard those who stem from areas blocked by the insert

Exit phase space

• Add collimator scatter electrons and treatment head photons

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Propagate the generated particles into the patient

Dublin 2018