Wednesday, 15:45 - 16:10 h, Room: MA 376


Albin Fredriksson
A characterization of robust radiation therapy optimization methods


A key aspect of external beam radiation therapy is the collocation of the patient anatomy and the treatment beams. Unless accounted for, systematic and random errors risk degrading the delivered treatment severely compared to the planned. We consider a minimax stochastic optimization framework that generalizes many previous methods used to account for systematic and random errors. The methods within this framework range from expected value to worst case optimization. We characterize how methods of this framework yield robust plans by studying the results of applying them to a two-dimensional phantom, and discuss how they differ from a conventional method that uses margins to account for uncertainties. For random errors, the importance of taking into account uncertainty in the probability distribution of the errors is highlighted.


Talk 2 of the invited session Wed.3.MA 376
"Radiation therapy treatment planning" [...]
Cluster 12
"Life sciences & healthcare" [...]


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