102 / 1542
cran
caud
left
right
1
6
2 8
7
4
3
9
5
11
10
patient 1
mean
set-up errors
- for each patient:
systematic
error is
a fixed error, occuring every day
- random
errors are day-to-day variations
around the
systematic
error
Systematic and random errors
patient set-up errors 2D:
each fraction:
- patient’s
systematic
error
mean error
- in each fraction:
total set-up error =
systematic
error +
random
error