Article Figures & Data
Figures
- Figure 1
(a) Identification of the medial wall slice. Sagittal computed tomography reconstruction cut showing the lateral-most aspect of the spinal canal. (b) The next cut is 2 mm lateral to the lateral aspect of the spinal canal and shows the medial wall slice with complete continuity of the pedicle from the vertebral body to the posterior elements.
- Figure 2
Identification of the vertebral artery foramen cut. The first cut that shows a complete semicircular opening is deemed the vertebral artery foramen cut. A complete semicircle is considered present when the height (H) is greater than the radius (R) of the foramen.
- Figure 3
(a) Identification of the vertebral artery foramen slice. A small portion of the superomedial aspect of the vertebral artery foramen can be seen in the C2 pedicle. (b) The next cut is 2 mm lateral and demonstrates a vertebral artery foramen with at least a full semicircular opening. This cut is deemed the vertebral artery foramen slice.
- Figure 4
Safe zone for C2 pedicle screw placement between slice 1 and the semicircle slice.
- Figure 5
Series of sagittal computed tomography cuts from the spinal canal through the pedicle. This patient has 4 slices of bony continuity that do not show the vertebral artery foramen. Thus, slices 1 through 4 represent the safe zone where a long pedicle screw can be placed.
Tables
In this issue
Jump to section
Related Articles
Cited By...
- No citing articles found.