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目的:确定耳蜗在颅骨的空间位置,设计最佳耳蜗X线摄片投照角度,用于评价电极位置。方法:测量26例耳蜗植入候选患儿术前CT和32例正常成人中内耳CT片上,耳蜗底周与正中矢状线的夹角;并根据测量的X线投射角度拍摄耳蜗位X线平片。结果:蜗轴中线与正中矢状线的角度为40°到68°,平均52.66°;其中儿童组的平均值为52.52°(s=7.07),成人组的平均值为52.80°(s=5.78),两者间差异无显著性意义(P>0.05)。结论:按所测的X线投射角度拍摄的耳蜗平片,能清晰完整显示电极系列的整体和所有的单个电极,确定电极的插入深度和准确的位置,为频率的匹配定位、语言处理方案的优化提供帮助。
OBJECTIVE: To determine the spatial location of the cochlea in the skull and to design the best cochlear radiography angle for evaluation of the electrode location. Methods: The included angle of 26 cases of cochlear implant candidates preoperative CT and 32 cases of normal adult middle ear CT film, the bottom of the cochlea and the median sagittal line were measured. The cochlear X-ray level was measured according to the measured X-ray projection angle sheet. Results: The angle between midline of mitral axis and median sagittal line was 40 ° to 68 ° with an average of 52.66 °. Among them, the average value of children group was 52.52 ° (s = 7.07) and the average value of adult group was 52.80 ° (s = 5.78 ), No significant difference between the two (P> 0.05). CONCLUSIONS: Cochlear plain radiographs taken at the projected X-ray projection angle clearly and completely show the whole and all individual electrodes of the electrode series, determine the depth of insertion and the exact location of the electrodes, match the positioning of the frequency, Optimization to help.