颞耳岩锥长轴方向的确定和应用

The confirmation and application of the long axis direction in temporo-auricular petrous pyramid

用头颅表面两个标志点确定岩锥长轴方向，指导梅氏（Ｍａｙｅｒ）位和斯氏（Ｓｔｅｎｖｅｒｓ）位摄影操作。对１２０例正常头颅ＣＴ图像进行测量，进行统计学处理，确定正常人岩锥长轴前延长线与头颅表面交点的大概位置。结果为：岩锥长轴前延长线交于对侧听眦线外眦后０．８２～２．９０ｃｍ区间，平均值左为１．６６ｃｍ，右为１．８２ｃｍ。结论，以平均值的邻值２ｃｍ为常数，即对侧听眦线外眦后２ｃｍ为岩锥长轴前延长线的前端体表定位标志，与其后端的乳突最突点共同确定岩锥长轴方向。

In order to guide the photograph performance, the petrous pyramid long axis direction was located by two mark points in the superficial skull. The CT images of skull from 120 normal individuals were mearsured and statistically processed to confirm the approximate cross position between the petrous pyramid frontal prolonged line and skull superficiality. Results showed that the petrous pyramid prolonged axis direction crossed in 0.82～2.90cm interval in the posterior canthus contralateral hearing, was left mean value 1.66cm and was right mean value 1.82cm. It could make a conclusion that the prtrous pyramid long axis direction was confirmed by the contralateral hearing canthus 2cm posterior as the frontal location marker together with its most process point of posterior.