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目的：借助ＣＴ 的薄层骨窗扫描技术和三维重建技术，寻找一种新的颅中窝径路内听道（ｉｎｔｅｒｎａｌａｕｄｉｔｏｒｙ ｃａｎａｌ，ＩＡＣ） 的定位方法。方法：首先对２０ 例成人干颅标本进行薄层骨窗ＣＴ扫描、测量并进行三维ＣＴ（３ＤＣＴ） 重建；然后进行显微颞骨解剖、测量；最后进行模拟手术。结果：显微测量与ＣＴ 测量密切相关。结论：在确定的平面上，过颧弓根做与冠状轴成α角的连线，在此线上向内移行距离ｄ 即定位出ＩＡＣ。本研究通过ＣＴ 扫描测量与三维ＣＴ重建技术，术前就可以了解每位病人的具体颞骨解剖特点，根据测量的准确数据，就能够精确定位ＩＡＣ，从而达到“一人一定位”的目标，弥补了传统定位方法的不足。
OBJECTIVE: To search for a new method of localization of internalactory canal (IAC) by means of CT scan and 3D reconstruction. Methods: Twenty cases of adult craniocerebral were examined by thin-slice computed tomography (CT). Three-dimensional computed tomography (3DCT) reconstruction was performed. Microsurgical and temporal bone anatomy and measurement were performed. Finally, the simulated operation was performed. Results: Microscopic measurements are closely related to CT measurements. CONCLUSIONS: In a defined plane, the anterior zygomatic arch is angled at an angle of α to the coronal axis, and the inward AC travels a distance of d to locate the IAC. In this study, CT scanning and three-dimensional CT reconstruction techniques, preoperative understanding of each patient’s specific temporal bone anatomical characteristics, accurate measurements based on the data can be accurately positioned IAC, so as to achieve the “one person one target” to make up for The lack of traditional methods of positioning.