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Summary

Multisource beam representations

– developed for several beam modalities

– allow modelling of individual machines by parameter settings

– actual implementations may vary with great impact on e.g.

narrow beam and IMRT performance

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– automated methods exist for parameter setting from measured

data

– parameters can also be readily derived from Monte Carlo phase

space data

Be critical to your data!

For new, well controlled and standardized machines one

may consider using a standard set of data!