摘要
目的:探讨儿童蜗神经发育不良(CND)的MRI及高分辨力CT表现。方法:回顾性分析34例(60耳)蜗神经发育不良的颞骨HRCT及内耳和内耳道MRI表现。分析比较3种影像学表现诊断CND的能力。结果:MRI显示蜗神经发育不良60耳,伴前庭神经异常28耳,伴面神经细小3耳,伴内耳畸形28耳。HRCT显示内耳道狭窄32耳,蜗神经孔狭窄28耳,骨性封闭25耳。MRI诊断CND明显优于CT(P<0.001);以HRCT显示蜗神经孔狭窄或封闭作为诊断CND的依据明显优于以HRCT显示IAC狭窄作为诊断CND的依据(P=0.043)。结论:MRI能准确显示CND,HRCT显示蜗神经孔狭窄或封闭高度提示CND,内耳道正常不能排除CND。
Objective：To explore high resolution computed tomography（HRCT） and MRI characteristics of children with cochlear nerve dysplasia（CND）.Methods：The images of 34 patients（60 ears） with CND,including temporal bone by HRCT,internal ear and internal auditory canal by MRI,were retrospectively reviewed.All of the 34 patients received internal ear MR imaging.HRCT was also performed.MR findings of cochlear nerve and HRCT features of cochlear nerve foramina and internal auditory canal were compared in the ability of CND diagnosis.Results：Of the 34 cases（68 ears）,60 ears with CND were revealed by MRI associated with abnormal vestibular nerve in 28 ears,thinning facial nerve in 3 ears,inner ear malformation in 28 ears.HRCT showed stenotic internal auditory canal in 32 ears,stenotic cochlear nerve foramina in 28 ears,atresic cochlear nerve foramina in 25 ears.MRI had obvious dominance in the diagnosis of CND relative to CT（P0.001）,stenotic and atresic cochlear nerve foramina shown by HRCT was more significant for CND diagnosis than stenotic internal auditory canal revealed by HRCT（P=0.043）.Conclusion：Cochlear nerve dysplasia can be accurately demonstrated by MRI.The stenosis or atresia of cochlear nerve foramina shown by HRCT may highly suggest CND,while normal appearance of internal auditory canal can not exclude CND.
出处
《放射学实践》
北大核心
2011年第3期260-263,共4页
Radiologic Practice
关键词
蜗神经
内耳道
蜗神经孔
体层摄影术
X线计算机
磁共振成像
Cochlear nerve
Internal auditory canal
Cochlear nerve foramina
Tomography
X-ray computed
Magnetic resonance imaging
