Dorn Spinal Therapy

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Match 3D 3D Oft Density: 1187

Fig. 12. Workstation screen demonstrating navigational information for the placement of a screw into the pedicle of C7.

spine, cervical corpectomy and the placement of pedicle screws into C7 (fig. 12) [3, 13-16]. While anterior cervical applications of image guidance present unique registration difficulties because of the relative lack of discreet registration points on the anterior surface of the cervical spine, sufficient navigational information can be obtained in order to improve the precision of these procedures.

Pitfalls of Image-Guided Spinal Navigation

Like any other computer-based technology, image-guided navigation is highly dependent on the quality of the information imported into the system. While obtaining the properly formatted CT images and having them correctly transferred to the navigational workstation is important, the critical step of image guidance is the registration process. If the surgeon takes too casual an approach to registration, inaccurate information will be displayed during intraoperative navigation.

Another important principle of image guidance is the need to correlate the navigational information with the surgeon's own knowledge of the surgical

Spine Navigation Registration



Action v Verify ♦ Trajectory

Screw Length (mm) 30

Screw Width (mm)

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