摘要
目的 探讨建立螺旋CT扫描及三维重建技术观察人工耳蜗植入电极方法 ,并比较X线摄片方法与螺旋CT扫描三维重建方法的耳蜗内电极的影像学特征及其临床应用价值。方法 18例人工耳蜗植入患者全部作术后X线摄片检查。其中 9例用经眼眶前后位摄片 ,9例采用侧斜位 6 0°摄片。 3例患者施行术后螺旋CT扫描及内耳三维重建方法。结果 2种投射头位的X线摄片均可显示电极形态及单个电极对 ,可间接判断电极在耳蜗内的植入深度。螺旋CT扫描三维重建图可直观地显示耳蜗形态、电极形态及其在耳蜗内植入的深度 ,可清晰识别单个电极对。结论 螺旋CT扫描三维重建方法可直观观察植入电极的形态及位置 ,可准确判断电极在耳蜗内植入的深度 。
Objective To evaluate the image feature of the X ray plain film, the spiral computed tomography (CT) scans and three dimension reconstruction of inner ear with implanted electrode.Methods Eighteen patients of cochlear implant (MEDEL Combi 40+) recipients were involved in this study. The implanted electrode of all patients were examined on the fifth to seventh postoperative day, by the use of X ray plain film with either anteroposterior transorbital projection (nine cases) or lateral position with coronal 60° away from the examine table (nine cases). Three of the cochlear implant recipients were examined by the way of spiral CT scans with axial 1mm image slices. The data of the CT scans was transferred to workstation for three dimensioned reconstruction (direct volume rendering) of the inner ear.Results The X ray plain film from both of anteroposterior projection and lateral with coronal 60°projection provide satisfactory image of implanted electrode including the shape and the position in the temporal bone. The insertion depth of the electrode can be evaluated indirectly. In contrast, the images from CT scans with 3D reconstruction of the inner ear demonstrate more accurately the shape, the position, and the insertion depth of the electrode. Moreover, each of the electrode pairs can be identified clearly.Conclusions X ray plain film can meet the routine needs of postoperative evaluation of the implanted electrode with several kinds of head position of projection. But CT scans with 3D reconstruction of inner ear provide more accurate image of the spacial relationship of the electrode in the cochlear canal with direct demonstration of electrode insertion depth in the cochlea.
出处
《中华耳鼻咽喉科杂志》
CAS
CSCD
北大核心
2004年第2期81-84,共4页
Chinese Journal of Otorhinolaryngology
基金
国家杰出青年科学基金 ( 3 992 5 0 3 5 )
卫生部临床重点学科项目 ( 2 0 0 12 3 3 2 )
教育部骨干教师基金 ( 2 0 0 0 65 )
国家自然科学基金 ( 3 9670 781)资助项目
关键词
人工耳蜗植入
术后
电极植入
影像学检查
三维重建
Cochlear implantation
Electrodes, implanted
Postoperative period
Tomography, X ray computed
