Basic Treatment Planning

Where to start?

• 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