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•
Introduction
•
Random and systematic set-up errors
•
Set-up correction protocols:
- general aspects
-
on-line
protocol
IGRT – tumor set-up correction strategies
-
off-line
protocols
• a too simple off-line protocol
• No Action Level (NAL) protocol
• eNAL (extended NAL)
2
protocol
2
de Boer, Heijmen, IJROBP, 2007