2208-2209 / 2239
“considering CTV preparation
uncertainties so that for 90% of
the patients the entire CTV is
inside the ITV”
True, unknown
CTV
inside the true, unknown
ITV
“considering CTV preparation
uncertainties so that for 10% of
the patients some CTV is outside
the ITV”
How much is some?
8
10
probability for a patient to have some CTV outside of ITV
%
Captured
CTV
inside the captured
ITV
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
2
4
6
8
10
0
2
4
6
CTV volume outside of ITV
probability
Σ
=0.05
R
Σ
=0.1
R
Σ
=0.2
R
%