以岩乳管定位上半规管的影像学研究  

A study of locating superior semicircular canal by petromastoid canal

作　　者：宋跃帅 龚树生[1] SONG Yueshuai;GONG Shusheng(Department of Otorhinolaryngology Head and Neck Surgery,Beijing Friendship Hospital,Capital Medical University,Beijng 100032,China)

机构地区：[1]首都医科大学附属北京友谊医院耳鼻咽喉头颈外科,北京100032

出　　处：《医学影像学杂志》2022年第12期2163-2166,共4页Journal of Medical Imaging

摘　　要：目的明确高分辨率CT岩乳管与上半规管的相对位置,探讨岩乳管作为上半规管定位标志的可行性。方法随机挑选我院储备的尸头标本30例(含颞骨60个,左、右侧颞骨各30个);所有标本均采用相同的扫描参数完成CT影像资料的采集;使用3D MPR三维重建方法,在水平位CT同时显示上半规管与岩乳管,并对二者的相对位置进行测量;比较所有标本上半规管与岩乳管的相对位置是否存在差异,比较二者的位置是否存在侧别差异,比较岩乳管的缺失率及其在不同侧别间的差异。结果高分辨率CT 60例颞骨中岩乳管的整体缺失率为6.7%,侧别对岩乳管缺失率的影响差异无统计学意义(χ^(2)=1.071,P>0.05);上半规管壶腹端与总脚端的平均距离为(6.780±0.385)mm;岩乳管与上半规管壶腹端、总脚端的平均距离分别为(4.599±0.478)mm和(2.164±0.453)mm;岩乳管与上半规管壶腹端、总脚端的距离差异有统计学意义(P<0.01);侧别对岩乳管、上半规管相对位置的影响差异无统计学意义(P>0.05);岩乳管与后半规管的共显率为20.0%。结论岩乳管较为恒定的出现于上半规管壶腹端与总脚端之间,且与上半规管的相对位置较为恒定,可以作为临床术前评估和术中定位上半规管的解剖标志之一。Objective To measure the distance between superior semicircular canal(SSC)and petromastoid canal in high resolution computed tomography(HRCT)and to evaluate the feasibility of locating SSC by petromastoid canal.Methods Thirty cases of cadaver heads were randomly selected from our anatomic laboratory,including 60 cases of temporal bones.All the temporal bones were scanned by the same CT machine with the same parameters and conditions.Later,the relationship of SSC and petromastoid canal were measured in the axial slices of 3D-MPR reconstructed HRCT.The difference of the distance from petromastoid canal to the ampullary side and common crus side of SSC were evaluated.And,the left and right side effect and the missing rate of petromastoid canals were also evaluated.Results In the axial slices of 3-D MPR reconstructed HRCT,the overall missing rate of petromastoid canal was 6.7%,there was no difference of left or right side(χ^(2)=1.071,P>0.05).The average distance from the ampullary side to the common crus side of SSC was(6.780±0.385)mm.The average distances from the petromastoid canal to the ampullary side and the common crus side of SSC were(4.599±0.478)mm and(2.164±0.453)mm respectively,which had a significant difference(P<0.01),however,there was no difference of left or right side(P>0.05).The petromastoid canal and the posterior semicircular canal appeared at the same time in 20.0%cases of temporal bone.Conclusion The petromastoid canal was stably appeared between the ampullary side and the common crus side of the SSC,and it could be considered as a reliable anatomic mark to identify the SSC.

关 键 词：岩乳管 上半规管 体层摄影术 X线计算机 

分 类 号：R322.923[医药卫生—人体解剖和组织胚胎学] R814.42[医药卫生—基础医学]