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CT Scanning Guidelines


The patient must remain completely still during the scan. If the patient moves during the scan, it must be repeated. Use fine overlapping slices with sub-millimeter spacing and Helical CT. The following table outlines appropriate slice thickness and spacing combinations in millimeters:

Anatomy Slice Thickness Spacing Example
Face 0.5 mm (or nearest to) 0.4 mm Orbits, mandible, CTA
Spine 0.75 - 1.25 mm 0.75 - 1.25 mm C. Spine, L. Spine
Skull 0.75 - 1.25 mm 0.75 - 1.25 mm Cranial Implants
Large Structures 0.75 - 1.25 mm 0.75 - 1.25 mm Pelvis, Femur, Forearm
Vessels 0.5 (or nearest to) 0.4 mm Aneurism


Algorithm: Please provide at least a 'Standard' 2nd or 3rd Recon.
Gantry Tilt: Zero.
Dose: Follow protocol.
Field of View (FOV): To include only the structures of interest to surgeon.
For cranial implants, include the entire skull.
Vascular Structures: If vascular anatomy is required, perform a CT Angiogram (CTA) with IV contrast administered by pressure injector.


Cone Beam CT
Cone Beam CT images must be sent in DICOM format – NOT as proprietary files combined with the viewer software.
  • Cone Beam CT images do NOT give the same clean models as standard CT. DO NOT expect them to. We will try our best.