lift reentry

observation and measurement of the sphenoid emissary vein foramen ( canal) of the greater wing, foramen rotundum, foramen ovale and foramen spinosum

蝶骨大翼蝶导静脉孔（管）、圆孔、卵圆孔和棘孔的观测

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conclusion: safe scope could be acquired in endoscopic transnasal surgery in pterygopalatine fossa and foramen rotundum could be thought as an important landmark.

结论：经鼻内窥镜翼腭窝手术可以获得相对安全的范围，圆孔可以作为手术中重要的标志结构。

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the study of the symmetry of the foramen rotundum is of great significance for clinical diagnosis, the regression formulas of its area may be deduced from its length and width.

圆孔面积左右对称性比较，对临床诊断疾病有参考意义.其面积的回归方程可由其长、宽径乘积推算。

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the anterior, posterior, medial and lateral wall of pterygopalatine space and its communication paths, including the foramen rotundum, pterygoid canal, sphenopalatine foramen, pterygomaxillary fissure and inferior orbital fissure were clearly displayed on transverse section.

横断面可清晰显示翼腭间隙前、后、内侧和外侧壁上的结构及圆孔、翼管、蝶腭孔、翼上颌裂和眶下裂等自然通道；

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A study on shape of foramen rotundum on the internal basal surface of skull and its regression formula of area

颅底内面圆孔的形态研究及其面积的回归方程

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the length of maxillary nerve was about ( 62.90 ± 3.81) mm from foramen rotundum to anterior nasal spur;

上颌神经出圆孔处至前鼻棘的距离为（62.90±3.81）mm；

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visualization of foramen rotundum 、 ovale and spinosum in registration of ct and mr

CT、MRI配准对圆孔、卵圆孔、棘孔的显示

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the display rates of foramen rotundum, foramen ovale, foramen spinosum and foramen lacerum were 86%, 100%, 99% and 99% respectively.

各孔显示率圆孔为86%、卵圆孔为100%，棘孔为99%，破裂孔为99%。

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the computer three-dimensional reconstruction program software was applied to display the foramen rotundum, foramen ovale, foramen spinosum and foramen lacerum. the measurement function of computer was adopted to determine the average inside diameters of the foramina above, and their shapes and gender differences were observed.

使用电子计算机三维重建程序立体地显示颅底内面的圆孔、卵圆孔、棘孔和破裂孔，并运用计算机的测量功能测出重建图像的颅底各孔径的内径均值，观察其形态及分析男女性别差异。

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