441 / 1456
Case 2 - Bladder
•
Offline setup corrections:
•
Systematic setup becomes 3 times smaller
•
Random setup remains the same
•
Organ motion remains the same
•
Online setup corrections:
•
Systematic and random setup become zero
•
Organ motion remains the same
•
Margin when doing offline or online setup
corrections:
41 mm
•
Because organ motion is so much larger than setup,
almost no effect of setup correction protocols on the
margin