Physics Bucharest 2017

choose M PTV

such that

in 10% of cases the CTV sticks (partially) outside the real (= blurred) 95% isodose

Why this choice, what about the other 10%?

- real dose distributions are not maximally conformal - Also for maximally conformal dose distributions, dose is not zero outside the 95% isodose small pieces may get dose lower than 95% but still high