• W C Peh, P Cheng, and F L Chan.
• Department of Diagnostic Radiology, University of Hong Kong, Queen Mary Hospital.
• Spine. 1995 Apr 15; 20 (8): 972-4.

Study DesignThe technique of obtaining direct coronal computed tomography images of the upper cervical spine is described.ObjectivesTo show the usefulness of this technique in demonstrating upper cervical spine lesions and to show that orbital (lens) radiation dosage is minimal compared with conventional tomography.Summary Of Background DataConventional tomography is used routinely for assessment of the odontoid peg and upper cervical spine lesions. Direct coronal computed tomography for imaging the cervical spine has not been previously described.MethodsUsing a removable head support device, direct coronal images are obtained using a computed tomography scanner. The gantry tilt is adjusted from the scanogram. Direct comparison of orbital radiation dosages between computed tomography and conventional tomography is made from placement of thermoluminescent dosemeter chips onto a phantom.ResultsDirect coronal computed tomography provide superior demonstration of skeletal features in the upper cervical spine. Orbital radiation dose is negligible compared with conventional tomography.ConclusionThis technique may replace conventional tomography in assessing of stable upper cervical spine lesions.

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