Advanced TP

Robust Control in Optimization

 A plan is robust , if treatment goals are met, despite uncertainties in the patient model.

Margins  A robust strategy for target coverage with a clear price (healthy tissue irradiated). Alternative  Abandon margins and model motion explicitly in optimization  Anticipate the variation to be encountered over the treatment course.  Statistical model with stable characteristics (probability distribution)  Focus on uncertainty from motion, rather than the details of the motion:  Achieve the correct mean target position, tailor beam intensity and margins

 Robust control anticipates variations without feedback