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目的探讨先天性内耳畸形的高分辨率CT表现。方法回顾性分析29例(46耳)婴幼儿先天性内耳发育畸形患者的CT表现,所有患者均做多层螺旋高分辨率CT横断面扫描及多平面重建,必要者利用容积再现技术对骨迷路进行三维重建。结果29例先天性内耳发育畸形患者双侧畸形者17例,单侧畸形者12例,内耳发育畸形共计46耳。具体分布如下:(1)Michel型(2耳),(2)耳蜗未发育(6耳),(3)共同腔畸形(5耳),(4)不完全分隔Ⅰ型(5耳),(5)不完全分隔Ⅱ型(传统Mondini型)(17耳),(6)耳蜗形态正常仅前庭及(或)半规管畸形(9耳),(7)单纯内耳道畸形(2耳)。结论高分辨率CT对先天性内耳骨迷路畸形具有重要的诊断价值,并可为人工耳蜗植入术适应证的选择提供重要依据。
Objective To investigate the high resolution CT findings of congenital inner ear deformity. Methods The CT findings of congenital inner ear malformations in 29 cases (46 ears) of infants and young children were analyzed retrospectively. All the patients underwent multi-slice spiral CT scan and multiplanar reconstruction. The volumetric reconstruction Three-dimensional reconstruction. Results Twenty-nine patients with congenital malformation of inner ear had bilateral deformity in 17 cases, unilateral deformity in 12 cases and inner ear deformity in 46 ears. Specific distribution is as follows: (1) Michel type (2 ears), (2) cochlear undeveloped (6 ears), (3) common cavity deformity 5) incomplete segregation of Type II (traditional Mondini type) (17 ears), (6) normal morphology of the cochlea only vestibular and / or semicircular canal deformities (9 ears), and (7) simple internal ear canal deformity (2 ears). Conclusion High-resolution CT is an important diagnostic value for congenital internal ear bony labyrinth and may provide important evidence for the selection of cochlear implant indications.