1122-1123 / 3107
Consider systematic errors only
M
PTV,sys
= 2.5Σ
How to choose M
PTV
,sys
for planning
?
van Herk et al (2000):
allow a probability of 10% that CTV sticks (partially) outside the PTV
a probability of 10% that part of the CTV gets dose <
95%
possible systematic (mean)
set-up errors relative to planning
planning
isoc
x
y
CTV
PTV
M
PTV,sys