Study of cone-beam CT in evaluating the electrode array of cochlear implantation postoperatively
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摘要: 目的：探索应用锥形束CT（CBCT）评估人工耳蜗植入术后电极形态的方法，明确CBCT在评估人工耳蜗电极形态中的价值。方法：选取52例重度-极重度感音神经性聋患者，均于人工耳蜗植入术后第1~2天实施植入侧颞骨CBCT扫描，使用NNT Viewer软件对扫描所得DICOM数据进行后处理，比较CBCT与X线平片识别手术相关结构的能力。结果：52例患者均成功实施人工耳蜗植入术，人工耳蜗双侧植入3例，左侧植入13例，右侧植入36例。CBCT可用于评估耳蜗内电极形态的方法有Panorex模式、MPR模式、3D-Ceph模式和3D-Bone模式4种方法。CBCT识别手术相关结构的能力明显高于X线平片。结论：CBCT评估手段灵活多样，在评估人工耳蜗植入术后电极形态方面有独特优势，具有临床应用价值。Abstract: Objective: To explore ways of evaluating morphological information of cochlea electrode in post cochlear implantation patients, and so as to make sure its value of clinical usage.Method: A series of 52 patients who were diagnosed as severe to profound sensorineural hearing loss and received cochlear implantation were admitted. All the patients had cone-beam CT scanning of the operated side 1 or 2 days after operation. The software of NNT Viewer was used to proceed original DICOM data of CBCT scanning in order to evaluate the morphological information. A comparative study in recognizing the numbers of anatomic structures was carried out between CBCT and X-ray.Result: All the 52 patients successfully received cochlear implantation as well as CBCT scanning.The cochlear implantation was implanted bilaterally at the same time in 3 patients, left side implantation in 13 patients and 36 cases in right side. There are four ways of evaluating the morphological information of electrode in cochlea post-operatively, including mode of Panorex, mode of MPR, mode of 3D-Ceph and 3D-Bone. A comprehensive evaluation can be achieved by the using of these four methods. The numbers of anatomic structures distinguished by CBCT is far more than X-ray.Conclusion: The evaluating methods of CBCT scanning is flexible and diverse, the CBCT scanning have unique values in clinical usage.
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Key words:
- hearing loss, sensorineural /
- cone-beam CT /
- cochlear implantation /
- cochlea /
- electrodes /
- morphology
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