Dose Course 2018_Flipping book
Model based dose calculations Energy fluence engine, multisource models
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Finite photon source size
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Open fluence distribution
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Fluence modulation – Step&shot
– Dynamic – Wedges
Treatment head processes to model
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Head scatter sources – flattening filter – collimators – wedges
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Back scatter from collimators to monitor
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Collimator leakage , including – MLC interleaf leakage – shape of MLC leaf ends
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Beam spectra
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Spectral changes
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Electron contamination
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