摘要
目的：研究桥小脑角区ＭＲＩ正常解剖。材料与方法：５具头颅标本磁共振成像（ＭＲＩ）与解剖断面对照，并与１０例正常人增强前后头颅ＭＲＩ配对比较。结果：桥小脑角区主要解剖结构为内听道及三叉神经，表现为：（１）内听道各壁在Ｔ１、Ｔ２加权像均为极低信号，宜用Ｔ２加权像观察内听道的大小和形态；（２）在Ｔ１加权像上可显示内听道内面神经、耳蜗神经、前庭上下神经等，且第Ⅶ、Ⅷ神经束粗细为３．０ｍｍ；（３）三叉神经粗细为２．０ｍｍ，在横断面Ｔ１加权像上显示最清楚。结论：ＭＲＩ能显示桥小脑角区细微的解剖结构，横断面和冠状面ＭＲＩ是显示结构的最佳断面。
Purpose: To study the MRI of the normal anatomical structures of cerebello pontine angle (CPA). Materials and methods: The MRI of five cadavour heads and the corresponding pathologic sections compared with the head MRI of 10 normal individuals with pre and post contrast study were analyzed. Results: The main anatomical structures in CPA are the internal auditory and trigeminal nerves. The MRI features are as follows: (1) The walls of the internal auditory canal show low signal intensity on T 1WI, while T 2WI should be used to observe the size and contour of the internal auditory canal; (2) T 1WI clearly show the facial nerve, superior vestibular nerve, inferior vestibular nerve and cochlear nerve. The diameters of the Ⅶ、Ⅷ nerves are 3.0 mm; (3) The trigeminal nerve is 2.0 mm in diameter and best demonstrated on transverse T 1WI. Conclusion: MRI can show the anatomical structures of CPA in detail. The transverse and coronal MRI are the optimal slices.
出处
《中华放射学杂志》
CAS
CSCD
北大核心
1997年第8期520-523,共4页
Chinese Journal of Radiology
关键词
小脑
脑桥角
成像
解剖学
NMR
Cerebel lopotine angle Magnetic resonance imaging Anatomy
