Physics Bucharest 2017

Why Monte Carlo Treatment Planning?

Accuracy  Dose calculation should be accurate within 2% to 3%  MC dose calculation engines can be even more exact than 3%  Regardless of the treatment setup

Uncertainties and Causes  Imperfect matching of the MC beam to the Linac within 1%  Uncertainties in the cross section libraries negligible  Limited number of simulated ‘events’  ~number of histories  Uncertainties in the conversion of CT data to the material composition and density difficult to quantify

Measurement Monte Carlo EPL

100 120

0 20 40 60 80

Dose (%)

Hol (2008)

0

100

200

Depth (mm)

34