Objective: to study the sectional anatomy of the bottom of the internal acoustic meatus and to provide anatomic data for imaging diagnosis and surgery.
目的：进一步明确内耳道底各结构的断面形态，为影像诊断和手术治疗提供解剖学资料。
SSD was the optimal imaging method for malformation in aortic arch area where the anatomic relationship was confusing.
对解剖关系复杂的主动脉弓分叉区域病变的显示及表面阴影显示（SSD）较理想。
Conclusion: the imaging anatomic classification of posterior ethmoid sinus has the instructive significance for basicranial surgery and the surgical approach via saddle area.
结论：后筛窦影像解部分型分度对前颅底外科及蝶鞍区手术具有实际的指导意义。
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