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On-line
protocol
- daily correction of full error (random + systematic components)
- maximal reduction of PTV margin
- if not automated: unacceptable increase of treatment time, large
workload
(dis)advantages of
on-line
and
NAL
NAL
protocol
- no image analysis at treatment unit, no increased fraction duration
- imaging only f
3, image analysis workload low
- significant (but partial) reduction of systematic errors and hence
PTV margin (
res
/
N)
- no reduction of random errors
Both protocols:
in first fraction, detection of gross errors/mistakes