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目的 了解中耳正常结构在CT仿真内镜下的影像学特征。明确传导性耳聋的听小骨及听骨链的形态学改变。方法 HispeedCT/I进行颞骨薄层螺旋扫描 ,层厚 1mm ,螺距 1,电压 14 0kV ,电流 170～ 2 2 0mA ;DFOV 9.6cm ,骨算法CTVE听小骨成像。结果 CTVE能清晰显示正常听骨链及细小结构 ,锤砧关节显示率 10 0 % (162 /162 ) ,“L”型镫砧关节显示率 80 % (13 0 /162 ) ,镫骨前后脚为 73 % (12 1/162 ) ,能够良好地显示中耳炎及胆脂瘤的听小骨破坏 ;能够准确地显示听小骨畸形。结论 CTVE在中耳的应用 ,快速、无创、立体直观地再现了听骨链及中耳腔情况 ,能够为传导性耳聋患者明确病因提供直观可靠的影像学依据
Objective To understand the imaging features of normal middle ear structures under CT simulation endoscopy. Clear conductive deafness of the ossicles and ossicular chain morphological changes. Methods Hispeed CT / I was performed spiral CT scans of the temporal bone with a slice thickness of 1 mm, a pitch of 1, a voltage of 140 kV and a current of 170-220 mA. Results CTVE could clearly show the normal ossicular chain and small structure. The ankle joint showed 100% (162/1662), the “L” type ankle joint showed 80% (13 0/162), the anterior and posterior stapes 73% (12 1/162), which can display the ossicular destruction of otitis media and cholesteatoma. It can accurately show the ossicular deformity. Conclusion The application of CTVE in the middle ear is rapid, noninvasive and stereoscopic to reproduce the condition of the ossicular chain and the middle ear cavity. It can provide an intuitive and reliable imaging basis for the definite cause of the conductive deafness