目的探讨椎动脉，特别是椎动脉颅内段的变异类型及其MRA表现，提高对真性球麻痹的认识与诊断水平。

Objective to investigate variant MRA features in vertebral artery so as to improve the ability of understanding and the diagnosis of the true bulbar paralysis.

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据此可反映出颈内动脉颅内段和椎动脉的血管流量以及静脉回流阻力等定量指标。

And then, it can reflect the blood vessel flux of internal carotid plexus, intracranial sector and vertebral, the quantification target of vein backflow drag.

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结论CT可以清晰显示颅内段椎管内段椎动脉钙化，可提高对该病变的认识，避免漏诊。

Conclusion CT can clearly demonstrate calcification in intracranial intra vertebral canal vertebral artery, thus improve its diagnosis.

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