额隐窝区域解剖结构CT影像学研究

Computed tomographic analysis of frontal recess region

目的:通过观察额隐窝区域的CT影像学特征,对该区域重要的解剖结构进行分析和研究。方法:选择82例(164侧)患者,对头部行多排螺旋CT扫描(螺距1 mm,扫描层厚5 mm,层距5 mm),然后在图像工作站上进行冠状位图像重建。观察影像上鼻丘气房、钩突上端附着点、额气房、眶上气房、额泡气房和额窦内间隔气房等解剖标志的出现概率。结果:鼻丘气房的出现率为87.8%。钩突前上部参与构成鼻丘气房的内壁、上壁、下壁和后壁,后上部向上可有单一附着点(89%)或2个附着点(11%)。钩突后上部的单一附着点主要位于眶纸板(54.9%),也可附着于中鼻甲(30.5%)或颅底(3.0%)。钩突后上部的2个附着点主要附着于眶纸样板和颅底(15侧,9.2%),也可附着于眶纸板和中鼻甲(4侧,2.4%)。额气房的出现率为40.3%,其中Ⅰ、Ⅱ型(30.5%)最多见,Ⅲ型和Ⅳ型(9.8%)少见,额窦间隔气房的出现率为4.3%。结论:额气房在额窦炎的发病过程中起着重要作用。

Objective：The purpose of the study was to observe the CT imaging features of the frontal recess regional. Method： Eighty two patients were undergone spiral computed tomography （CT）. Then muhiplanar reconstruction images were made using standard triplanar reconstruction protocol on a computer workstation. Result： The prevalence of agger nasi cell was 87.8% （144/164）. One hundred and forty five （89% ,145/164） uncinate processes had one superior attachment for each uncinate process. The others had two superior attachments for each uncinate process. The uncinate process＇ single superior attachment of into the surrounding structures was identified to have the following distribution： 90/164 （54.9 %） to the lamina papyracea, 50/164 （30.5% ）to the middle turbinate, and 5/164 （3.0%） to the skull base. Of all the frontal cells were identified in 144 （87.8%） sides of frontal recesses, the prevalence of type Ⅰ Ⅱ , typeⅢ Ⅳ, were 30.5% and 9.8%respectively. Conelusion：T Agger nasi cell and uncinate process play an important role in endoscopic frontal sinus surgery.