方法正常颅骨25个，肉眼观察眶下裂和眶下沟解剖形态。
Methods25normal skull were used to investigate the configurations of IOF and IOG.
冠状断面利于观察翼腭间隙顶壁、圆孔、眶下裂、翼管及其与蝶窦的关系。
The hanging wall of the pterygopalatine space, fora- men rotundum, inferior orbital fissure, pterygoid canal and its relationship with the sphenoidal sinus were dis- played on coronal section.
目的研究正常人眶下裂和眶下沟横断面CT表现及其解剖基础，避免将其误认为眶壁骨折。
Objective To show imaging findings of inferior orbital fissure(IOF)and groove(IOG)on axial CT scans and to discover their anatomic variations, so as to avoid misdiagnosing them as orbital fracture.
目的研究正常人眶下裂和眶下沟横断面CT表现及其解剖基础，避免将其误认为眶壁骨折。
Objective To show imaging findings of inferior orbital fissure(IOF)and groove(IOG)on axial CT scans and to discover their anatomic variations, so as to avoid misdiagnosing them as orbital fracture.
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