Intraoperative 3-dimensional imaging (O-arm) for assessment of pedicle screw position: Does it prevent unacceptable screw placement?

Left, New-generation intraoperative CT imaging system (O-arm) designed to provide 3D imaging information in a timely fashion. (Used with permission from Medtronic Navigation.) Right, Snapshot of imaging system workstation screen showing ability to assess spinal elements and pedicle screws in all 3 planes (axial, coronal, and sagittal).