目的 :探讨CT和MRI检查对人工耳蜗植入术前评估的价值。方法 :对 2 6例感音性耳聋患者均采用颞骨轴位高分辨率CT螺旋扫描、MR水成像及内耳三维重建。结果 :1 8例先天性感音性耳聋患儿中检出Mondini畸形Ⅰ型 1例 (2耳 ) ,Ⅱ型 1例 (2耳 ) ,内耳纤维化 1例 (2耳 ) ;5例语后聋患者中检出慢性化脓性中耳炎 1例 (2耳 ) ,内耳骨化 1例 (2耳 )。结论 :对于人工耳蜗植入术的术前评估 ,CT检查具有重要价值 ,必不可少 ,MRI检查是必要的补充。对内耳的三维重建 ,MRI优于CT。 Objective: To evaluate the value of CT and MRI in the preoperative evaluation of cochlear implants. Methods: Twenty-six patients with sensorineural deafness were examined by high resolution CT spiral CT, MR water imaging and three-dimensional reconstruction of the inner ear. Results: Mondini deformity was detected in 1 case (2 ears), 1 case (2 ears) in type Ⅱ and 1 case (2 ears) in 1 case of congenital hearing loss. One case (2 ears) of chronic suppurative otitis media was detected in the patients and one case of ossification of the inner ear (2 ears). CONCLUSIONS: CT is an important and prerequisite assessment of cochlear implant surgery. MRI is a necessary supplement. Three-dimensional reconstruction of the inner ear, MRI is better than CT.