耳蜗前庭神经异常的磁共振成像研究  

MRI Diagnosis of Cochlear Nerve and Vestibular Nerve Lesion

作　　者：卢成哲[1] 宦怡[1] 葛雅丽[1] 赵海涛[1] 张劲松[1] 杨春敏[1] 李科[1] 魏梦琦[1] 

机构地区：[1]第四军医大学西京医院放射科,陕西西安710032

出　　处：《实用放射学杂志》2003年第5期412-415,共4页Journal of Practical Radiology

摘　　要：目的　探讨磁共振成像技术在耳蜗前庭神经异常诊断中的应用价值。方法　对 40例疑有耳蜗前庭神经异常的患者应用高分辨三维快速自旋回波T2 WI序列 (T2 WI/3D/TSE)做颞骨容积扫描 ,然后行T2 WI/3D/TSE或平衡式三维快速梯度回波序列(B -TFE)双侧斜矢状位扫描。 12例行增强扫描。结果　 40例均能清晰地显示耳蜗前庭神经的细微解剖结构。耳蜗前庭神经异常者 12例 15耳有明显MRI表现 ,其中 1例 1耳Michel畸形和 1例 2耳Mondini畸形者显示耳蜗前庭神经信号缺失 ;4例 8耳获得性感音神经性耳聋和 6例 4耳听神经瘤者显示蜗神经萎缩变细。结论　T2 WI/3D/TSE及B -TFE序列能很好地显示耳蜗前庭神经的精细结构 ;Objective To probe into the value of clinical application of magnetic resonance imaging (MRI) scanning technique in the diagnose of cochlear nerve and vestibular nerve lesion.Methods The scanning of temporal bone was carried out with T 2WI/3D/TSE in 40 cases suspected for cochlear nerve and vestibular nerve lesion and the bilateral inclined sagittal MRI scanning was performed with T 2WI/3D/TSE or B-TFE sequence .The contrast enhanced scans were performed in 12 cases. Results The fine anatomic structure of cochlear nerve and vestibular nerve lesion was clearly shown in 40 cases and the cochlear nerve and vestibular nerve lesion was found in 15 ears in 12 cases,of which we found the signal deficiency of cochlear nerven and vestibular nerven in one ear in one case of Michel malformation and two ears in one case Mondini malformation and cochlear nerve atrophy in 8 ears in 4 cases of the acquired sensorineural hearing loss and in 4 ears in 6 cases of acoustic neurinoma.Conclusion With 3D-TSE and B-TFE sequence the fine structure of cochlear nerve and vestibular nerve lesion can be clearly demonstrated; and inclined sagittal MRI scanning plays a very important role in discovering cochlear nerve and vestibular nerve lesion .

关 键 词：耳蜗前庭神经异常 磁共振成像 解剖结构 内耳疾病 临床表现 

分 类 号：R764.35[医药卫生—耳鼻咽喉科] R445.2[医药卫生—临床医学]