Multiplanar evaluation of the optic canal from axial transverse CT sections.

High resolution multiplanar images of the optic canal can be obtained using computer transformations of 1.5 mm axial transverse sections through the orbit. Parasagittal sections through the optic canal along the course of the optic nerve or sections perpendicular to the canal are easily and reproducibly obtained. This approach is a much more efficacious means of examining the optic canal both in terms of information yield and reduction in radiation dose.