Dose 2016

“considering CTV preparation uncertainties so that for 90% of the patients the entire CTV is inside the ITV”

“considering CTV preparation uncertainties so that for 10% of the patients some CTV is outside the ITV”

True, unknown CTV inside the true, unknown ITV

How much is some?

probability for a patient to have some CTV outside of ITV

10

8

Σ =0.2 R

%

6

Captured CTV inside the captured ITV

Σ =0.1 R

4

Σ =0.05 R

probability

2

Due to symmetry, the probability of the true, but unknown CTV being inside the captured ITV is equal to the probability of the captured CTV being inside the true, unknown ITV

0

0

2

4

6

8

10

%

CTV volume outside of ITV