MRI findings in the upper cervical spine in RA.

概要

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MRI findings in the upper cervical spine of 9 patients with RA were reviewed to correlate them with those using plain radiography and CT. In myelopathy, the measurements of the space available for the spinal cord (SAC), Ranawat's method and the atlanto-axial angle in plain lateral radiograms were shown to be very useful, while the atlant-dental interval (ADI) was not. But there was no correlation between the classification of the odontoid process and spinal cord shapes shown in CT and myelopathy. High-signal intensity of pre-and post-odontoid space on Ti-weighted images was observed in 6 cases. MRI was also useful for evaluation of the spinal cord shape and deviation, and of abnormality of the lower cervical spine and vertebral body. In the future, MRI will be considered superior to CT for observing the upper cervical spine in RA.
日本関節病学会の論文