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.
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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