Chen T, Liang Y, Zhang W, Ban M L, Chen W
Department of Otolaryngology Head and Neck Surgery, Southern Medical University Nanfang Hospital, Guangzhou, 510515，China.
Department of Radiology, Southern Medical University Nanfang Hospital.
Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi. 2018 Jul;32(14):1082-1085;1090. doi: 10.13201/j.issn.1001-1781.2018.14.010.
Application of technique of high resolution CT (HRCT) and multipliate plane reconstruction, analyzed the image features of suspicious superior semicircular canal dehiscence (SSCD) to improve the understanding of the SSCD.From January 2016 to April 2017, a total of 230 adult patients who checked temporal bone HRCT were collected in this retrospective study, of which 160 cases (320 ears) of the non-SSCD, 73 cases were male (146 ears), 87 cases were female (174 ears), aged 18 to 70 years old; 70 cases (113 ears) were suspicious diagnosed with SSCD, 33 cases were male (55 ears), 37 cases were female (58 ears), and 18 to 71 years old. The thin section CT scan of the temporal bone translocation was performed on all subjects, then the CT post processing workstation was used for multipliate plane reconstruction (MPR), and the main rows of coronal and oblique sagittal image reconstruction was performed. To observe, measure and record the HRCT features and datas of the suspicious SSCD and non-SSCD, then analyze the collected data.There were 160 cases (320 ears) in non-SSCD group, and the height of the superior semicircular canal was (6.43±0.51)mm, the outer tube diameter was (0.83±0.13)mm, the thickness of the tympanic cavity was (2.19±0.62)mm, the anteroposterior diameter of mastoid was (14.55±1.98)mm; There were 70 cases (113 ears) in the suspicious SSCD group, the above results were (6.42±0.60)mm, (0.85±0.16)mm, (1.62±0.55)mm, (13.24±1.97)mm, respectively. Statistical analysis showed that there were no significant difference in the height of the superior semicircular canal (=0.94) and the outer tube diameter (=0.64), There were significant differences in the thickness of the tympanic cavity (=0.002) and the anteroposterior diameter of mastoid (=0.004). There were 70 cases (113 ears) in group suspicious SSCD, the unilateral defect had 27 cases (27 ears), and bilateral defect had 43 cases (86 ears). The defect was located in the middle of the parietal wall in 48 ears, located in the anterior wall of 20 ears, located in the posterior wall of 32 ears, more than two defects in 13 ears; 7 ears were mastoid pneumatic type, 90 ears were mastoid sclerotic type, 16 ears were mastoid mixed type.The SSCD was more common in the sclerotic mastoid. The bilateral defect was common, mostly located in the middle of the parietal wall. The occurrence of the lesion is not related to the height and diameter of the superior semicircular canal, but may be related to the thinning of the whole temporal bone.
应用高分辨率CT（HRCT）及多平面重建技术，分析可疑上半规管裂（SSCD）的影像特征，以提高对SSCD的认识。2016年1月至2017年4月，本回顾性研究共收集230例进行颞骨HRCT检查的成年患者，其中非SSCD者160例（320耳），男性73例（146耳），女性87例（174耳），年龄18至70岁；可疑诊断为SSCD者70例（113耳），男性33例（55耳），女性37例（58耳），年龄18至71岁。对所有受试者进行颞骨平移薄层CT扫描，然后利用CT后处理工作站进行多平面重建（MPR），主要进行冠状位及斜矢状位图像重建。观察、测量并记录可疑SSCD及非SSCD的HRCT特征及数据，然后对收集的数据进行分析。非SSCD组160例（320耳），上半规管高度为（6.43±0.51）mm，外管径为（0.83±0.13）mm，鼓室厚度为（2.19±0.62）mm，乳突前后径为（14.55±1.98）mm；可疑SSCD组70例（113耳），上述结果分别为（6.42±0.60）mm、（0.85±0.16）mm、（1.62±0.55）mm、（13.24±1.97）mm。统计学分析显示，上半规管高度（P=0.94）及外管径（P=0.64）差异无统计学意义，鼓室厚度（P=0.002）及乳突前后径（P=0.004）差异有统计学意义。可疑SSCD组70例（113耳），单侧缺损27例（27耳），双侧缺损43例（86耳）。缺损位于顶壁中部48耳，位于前壁20耳，位于后壁32耳，2处以上缺损13耳；乳突气化型7耳，乳突硬化型90耳，乳突混合型16耳。SSCD在硬化型乳突中更常见。双侧缺损常见，多位于顶壁中部。病变的发生与上半规管的高度和直径无关，但可能与整个颞骨变薄有关。
