4 Classical extension table, legs spread.
4 The C-arm is positioned between the legs, brought in from the direction of the feet. Only one C-arm is used.
4 The surgeon is seated, looking towards the head.
4 The camera, navigation system and fluoroscopy monitor are positioned at the head end on the operation side, at an angle of about 45° to the operating table.
4 After making the registration adjustments, the C-arm remains in the ante-roposterior position for further control scans during the operation.
4 Cover the operation site with foil, preferably without holding clips.
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