Fang Qin, Zhou Wenwen, Liu Yanling, Liu Lingyuan, Tan Songhua
Department of Otolaryngology Head and Neck Surgery，the First Affiliated Hospital of Guangxi Medical University，Nanning，530021，China.
Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi. 2021 Sep;35(9):788-795. doi: 10.13201/j.issn.2096-7993.2021.09.005.
To identified the feasibility and normal range of cone beam computer tomography（CBCT） in the measurement of temporal bone. 15 formalin fixed human cadaver head specimens were scanned by CBCT, high resolution CT, and Micro CT, respectively. Morphological parameter measurements of the middle and inner ear structures including ossicular chain, cochlea, semicircular canal and facial nerve were performed, and the results measured by the three scanning methods were compared. None of the parameters measured by the three scanning methods were statistically significant except the thickness of stapes footplate（<0.01） and the diameter of cochlear basal turn（<0.01）. CBCT was superior in detecting facial nerve bony canal dehiscence. CBCT has the advantages of short scanning time, low radiation dose and high resolution. It can accurately display the morphological characteristics of the temporal bone structures, and is a reliable evaluation method for otological surgery.
为确定锥形束计算机断层扫描（CBCT）测量颞骨的可行性及正常范围。分别对15例福尔马林固定的人体尸体头部标本进行CBCT、高分辨率CT及显微CT扫描。对中耳和内耳结构包括听骨链、耳蜗、半规管及面神经进行形态学参数测量，并比较三种扫描方法的测量结果。除镫骨底板厚度（<0.01）和耳蜗底转直径（<0.01）外，三种扫描方法测量的参数均无统计学意义。CBCT在检测面神经骨管裂方面更具优势。CBCT具有扫描时间短、辐射剂量低及分辨率高的优点。它能准确显示颞骨结构的形态特征，是耳科手术可靠的评估方法。
