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通过对１１２例枕－寰枢椎区正常者的Ｘ线和ＭＲＩ矢状径线对照测量，提出国人枕－寰枢椎区ＭＲＩ矢状径线正常值，并认为两者在成像方面各有侧重。ＭＲＩ可提供更丰富的信息，对手术有较大的指导意义。枕－寰枢椎区脊髓代偿空间的较大差异来源于个体变异及动态改变，应引起临床的高度重视。
Based on the measurement of X-ray and MRI sagittal diameter of 112 patients with normal occipito-atlantoaxial region, the normal values of MRI sagittal diameter of the occipital-atlantoaxial region of the Chinese were proposed and both of them were considered in imaging . MRI can provide richer information and is of great guiding significance to the operation. Occipital - atlantoaxial spinal cord compensatory space greater differences from the individual variation and dynamic changes should be caused by clinical attention.