先天性耳畸形和正常颞骨的螺旋CT三维成像分析

目的：探讨螺旋CT扫描及三维重建成像技术在先天性耳畸形和正常颞骨的临床应用，方法：采用螺旋高分辨CT扫描技术，对16例先天性，中耳畸形及40例正常耳行多平面重建，曲面重建和三维表面成像，结果：16侧患耳畸形为：外耳道骨性闭锁，鼓室狭小，听小骨发育不育，面神经管异常等。小视野密集重建清晰显示了细微结构，多平面重建提供多位信息，三维表面成像立体直观地显示形态结构，结论：螺旋高分辨CT及三维重建成像技术有利于外，中、内耳正常结构的显示和先天畸形的诊断，三维重建成像技术能提供更多的诊断信息，建议临床选择应用。

Analysis of 3D spiral CT of normal and congenital malformations of the external and middle ear

Objective:To assess the clinical application of 3D spiral CT of normal and congenital malformations of the external and middle ear.Methods:3D reconstruction techniques of 40 normal ears and 16 ears with congenital malformations of the external and middle ear were performed,including overlapping reconstruction with small field of view,multiplanar reformation (MPR),curved reformation and shaded surface display (SSD).Results:3 dimensional spiral CT clearly showed the complicated structure of all ears.There were complicated malformations in 16 abnormal ears,including bony atresia,small tympanic cavity,ossicle dysplasia and facial nerve canal abnormalities.In all cases,the finer structures were identified by the heavily overlapping axial imaging.MPR provided images with superior imaging quality.3D SSD images could provide multiple stereoscopic views,and improve the understanding of individual structural anatomy.Conclusion:Spiral CT and 3D reconstruction can provide valuable information in the demonstration of normal structural anatomy of the ear and diagnosis of congenital malformations.