颅中窝径路内耳道CT的定位  

COMPUTED-TOMOGRAPHY-AIDED LOCALIZATION OF THE INTERNAL AUDITORY CANAL IN THE MIDDLE CRANIAL FOSSA

作　　者：李永新[1] 殷善开[2] 席焕久[3] 孙连玉[2] 潘喜民 幺中玉 

机构地区：[1]锦州医学院第一附属医院耳鼻咽喉头颈外科 [2]锦州医学院人体解剖学教研室 [3]锦州医学院第一附属医院放射线科

出　　处：《中国耳鼻咽喉颅底外科杂志》1999年第4期235-240,共6页Chinese Journal of Otorhinolaryngology-skull Base Surgery

摘　　要：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 find a new method that locates internal auditory canal (IAC) by using thin cut CT scans and 3 dimensional computed tomographic (3DCT) reconstruction techniques in the middle cranial fossa. Methods: 20 dry skulls were measured through the images obtained from thin cut bone window CT scans, and 3DCT reconstruction were performed with 3DCT software. Then temporal bones were dissected and measured, and simulation surgery was performed. Results: The measurements through dissection are close, correlated with those determined by CT. Conclusion: On the reference plane, draw the line that passes the zygomatic root and forms the angle “α” with the midcoronal line, move the distance “ d ” along the line towards the inside, then locate the IAC. It is found that the IAC can be located precisely and the goal “one patient, one localization” can be reached by relying on the scanning of CT and 3DCT reconstruction techniques in the middle cranial fossa. This method also compensates for the defects of the traditional methods of locating the IAC in the middle cranial fossa. [

关 键 词：内听道 颅中窝 定位 CT 内耳手术 IAC 

分 类 号：R764.92[医药卫生—耳鼻咽喉科] R816.96[医药卫生—临床医学]