Department of Otorhinolaryngology, Head and Neck Surgery, Eye, Ear, Nose, and Throat Hospital, Fudan University, Shanghai, China.
NHC Key Laboratory of Hearing Medicine, Fudan University, Shanghai, China.
ORL J Otorhinolaryngol Relat Spec. 2020;82(1):8-14. doi: 10.1159/000503883. Epub 2019 Dec 18.
The aim of the present study is to assess the impact of different slice thicknesses in computed tomography for labyrinthine fistula evaluation and to determine the appropriate slice thickness.
A total of 258 patients who underwent mastoidectomy and tympanoplasty for chronic otitis media with cholesteatoma from 2010 to 2014 were reviewed. The radiological diagnoses were compared with intraoperative findings. Sensitivity and specificity of 2.0-, 1.5-, 1.0-, and 0.75-mm-thick computed tomographic (CT) images for the evaluation of labyrinthine fistulae were calculated. Cohen's κ coefficient was also calculated.
The sensitivities of 2.0-, 1.5-, 1.0-, and 0.75-mm-thick CT images for the evaluation of labyrinthine fistulae were 76.9, 86.5, 90.4, and 93.3% (observer 1) and 67.3, 76.0, 79.8, and 87.5% (observer 2), respectively. The specificities of 2.0-, 1.5-, 1.0-, and 0.75-mm-thick CT images for labyrinthine fistula evaluation were 96.1, 94.8, 95.5, and 95.5% (observer 1) and 99.4, 97.4, 95.5, and 94.8% (observer 2), respectively. Cohen's κ coefficients were 0.790, 0.788, 0.876, and 0.911 in 2.0-, 1.5-, 1.0-, and 0.75-mm-thick CT images, respectively.
The sensitivity of CT for labyrinthine fistula evaluation increases with decreasing slice thickness, while the specificity does not improve.
本研究旨在评估不同层厚的 CT 在评估迷路瘘管中的作用，并确定合适的层厚。
回顾了 2010 年至 2014 年间 258 例因胆脂瘤型慢性中耳炎行乳突切除术和鼓室成形术的患者。将放射学诊断与术中发现进行比较。计算了 2.0、1.5、1.0 和 0.75-mm 厚 CT 图像评估迷路瘘管的敏感性和特异性。还计算了 Cohen's κ 系数。
2.0、1.5、1.0 和 0.75-mm 厚 CT 图像评估迷路瘘管的敏感性分别为 76.9%、86.5%、90.4%和 93.3%（观察者 1）和 67.3%、76.0%、79.8%和 87.5%（观察者 2）。2.0、1.5、1.0 和 0.75-mm 厚 CT 图像评估迷路瘘管的特异性分别为 96.1%、94.8%、95.5%和 95.5%（观察者 1）和 99.4%、97.4%、95.5%和 94.8%（观察者 2）。2.0、1.5、1.0 和 0.75-mm 厚 CT 图像的 Cohen's κ 系数分别为 0.790、0.788、0.876 和 0.911。
CT 评估迷路瘘管的敏感性随层厚的减小而增加，而特异性并无提高。
