IMRT 2018

Cost function vs. plan evaluation

The dose distribution resulting from (unconstrained) optimisation typically contains

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•Features you requested and you obtained •Features you requested and you did not obtain

•Features you did not request •Neutral features •Negative features (you left a ‘hole’ in the cost function, and the optimisation took advantage from it) •Positive features (you got them ‘for free’, as a byproduct of other features)

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