中耳仿真内镜成像的临床应用研究

目的：探讨CT仿真内镜（CTVE）显示中耳正常结构的方法，确立显示听骨链及其他中耳结构的位点和方法。方法：选择40例无耳科疾病的正常志愿者，采用德国西门子螺旋CT机Inner Ear扫描程序对正常志愿者进行轴位扫描，重建原始图像，用Fly—through软件经选择的A、B、C点入路进行CTVE成像研究。重点显示听骨链连接状态。结果：40例正常志愿者经选择的A、B、C点入路行CTVE中，锤骨、砧骨、鼓岬、面神经管水平段和外半规管隆凸显示率均为100％；圆窗、卵圆窗为90％、93％、98％，听小骨全貌为100％、95％、93％。结论：通过选择恰当的入路，CTVE在显示听小骨及其连接关系方面有相当优势。CTVE是断层影像的有力补充。

The clinical application of spiral CT virtual endoscopy of middle ear

Objective:To explore the clinical application of CT virtual endoscopy(CTVE) of ossicular chain in middle ear,and to establish the accurate method of observing ossicular chain and middle ear anatomy.Method:Volume scanning with spiral CT unit was performed in forty normal cases without illness of ear.Endoscopic 3D processing was carried out on a separate workstation equipped with a flying through program.From three isolated points(A,B and C),ear drum and ossicles were observed with CTVE method.The status of auditory ossicles connection were focused.Result:In CTVE via A,B and C points,the indication rates of the malleus,the indus, the drum cape,the canalis facialis horizontal section,and the prominence of horizontal semicircular canals were prosperously 100%.The indication rates of round window and the fenestra ovalis were 90%,93%,98% via A,B and C points respectively.And the indication rates of complete demonstration of ear ossicles were 100%,95%,93%,respectively.Conclusion:With appropriate approach,CTVE has advantage of showing ear ossicles and their connections,which is a good supplement of routine CT.