184-185 / 3581
Re-scanning vs replanning
•
New scan, same fixation
•
To check that the dose
distribution is still
acceptable
•
Can be planned (e.g. half
way through treatment) or
ad hoc
•
Replace by CBCT
recalculation ?
•
New fixation?
•
New contouring?
•
New plan ?
•
Hot topic, but limited data
on the actual clinical
benefits
•
New uncertainties can be
introduced