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In contrast to ERT, where the set-up of the real Beams (irradiation) is based on:
•
Immobilization of the patient as in planning process (CT)
•
(re)Positioning of the patient using the RP and the Machine
Coordinate System (Laser Projection of Isocentre)
➔
RP = Laser-Iso
The Reference Pont (RP)