689 / 815
Where to start?
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Margins are calculated with recipes:
E.g: M=2.5*Σ+0.7*σ
Σ= sum of systematic errors
σ= sum of random errors
Systematic errors: errors occuring in the
treatment preparation phase:
E.g. delineation, breathing error on CT
Random errors: errors occuring in the execution
phase:
E.g. interfraction motion