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Accuracy of imaging
Accuracy of IGRT to detect set-up errors
Cone-beam CT
: Elekta Synergy S system
Meyer et IJROBP 2008
3D error always <0.5mm, “never observed a fusion error”
Orthogonal X-rays:
Novalis Exactrak system
Ramakrishna Radiother Oncol 2010
Fusion errors in 3 / 102 patients: difference between DRR and X-ray