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 RTT registers CT scans and determines movement:
- <1 cm no planselection
- Between 1 en 2 cm: 2 plans
- 2 cm < 4 plans
 Physician delineates target volumes on full bladder CT scan
 Physician delineates bladder and uterus on empty bladder CT scan
 Physician generates intermediate structures
 RTT creates PTV margins and delineates OAR.
CT scans full and empty bladder