耳蜗发育畸形HRCT及蜗神经孔CTVE观察

High Resolution CT and CT Virtual Endoscopy Findings in Patients with Cochlear Anomalies

目的:探讨耳蜗发育畸形和蜗神经孔发育异常的影像学表现。方法:搜集本院经耳科及影像学检查诊断为耳蜗发育畸形的52例患者HRCT原始图像,观察耳蜗发育畸形的不同类别,用CTVE技术显示内听道底蜗神经孔形态。结果:52例中耳蜗不发育3例,耳蜗发育不全2例,不完全分隔Ⅰ型7例.不完全分隔Ⅱ型20例,共腔畸形4例,蜗神经孔发育不良10例.蜗轴缺如6例。结论:HRCT能准确显示各类骨性耳蜗畸形的特征.CTVE可立体直观的显示各类畸形伴随的蜗神经孔的螺旋形态的改变.是HRCT二维图像的有效补充。

Objective：To study the imaging findings of cochlea and cochlear nerve foramen in patients with cochlear anomalies. Methods：The raw data of high resolution CT （HRCT） images of 52 cases with cochlear anomalies diagnosed by radiologists and otologists were collected. The characteristics of various cochlear anomalies on multi-planar reformation （MPR） images were studied, the cochlear nerve foramina of internal canal were displayed with CT virtual endoscopy （CTVE） technique. Results：Of the 52 patients,absence of cochlea was assessed in 3 cases,cochlear hypoplasia in 2 cases,incomplete partition type I in 7 cases, type 11 in 20 cases, common cavity anomaly in 4 cases, hypoplasia of cochlear nerve foramen in 10 cases, absence of cochlear modiolus in 6 cases. Conclusion：The direct and stereopsis characteristics of various bony cochlear anomalies could be shown on HRCT and CTVE images,which was an effective complement for 2D CT.