192 / 1542
M
PTV,sys
= 2.5Σ
Consider systematic errors only
M
PTV,sys
= 2.5Σ
planning
isoc
x
y
CTV
PTV
M
PTV,sys
% of cases with CTV partially outside PTV
M
PTV,sys
/ ∑
Van Herk, 2000
formula B9
20% 2.16Σ
10% 2.50Σ
5% 2.79Σ
1% 3.36Σ
0%
TBI