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In-room image guidance
How to deal with these non-rigid changes of target
volumes and organs at risk?
1.Volume image required to visualization
2.Quantification would require deformable image registration
-> available but only offline
3. Online dosimetric evaluation would be required for a decision
making process
-> not available, yet
4.Compensation strategies:
Perform an average IGRT shift
Adapted PTV margins
Re-planning