15例成年国人内耳膜迷路及内耳道MRI最大密度投影三维重建图像的解剖学研究

目的研究成年国人内耳膜迷路及内耳道最大密度投影(MIP)三维重建图像，观测内耳主要结构磁共振成像(MRI)的正常解剖测量值，为临床耳显微外科及神经外科手术提供解剖学依据。方法选用15名健康志愿者，使用GE-signal 1．5T超导型核磁共振机，环行耳颞部线圈，三维快速自旋回波序列(3D／FSE／T2W1)(水成像)及脂肪抑制技术，对两侧耳部同时进行扫描。原始扫描图像行MIP三维重建，多角度旋转对内耳主要结构进行解剖学观测。所得数据用SPSS10．0软件进行统计学分析。结果MIP三维重建能满意显示两侧内耳膜迷路及内耳道的解剖结构，其中3个膜半规管、椭圆囊、球囊、蜗管及内耳道呈高信号。测量结果内耳主要结构均无显著的侧别差异。结论临床MIP三维重建能直观、立体地显示内耳膜迷路及内耳道的结构，为成年国人内耳主要结构MRI正常解剖测量值的确立提供了一定的基础资料。

ANATOMIC STUDY OF MAXIMUM INTENSITY PROJECTION IN MRI FOR MEMBRANOUS LABYRINTH AND INTERNAL AUDITORY MEATUS IN 15 CHINESE ADULTS

Objective The three-dimensional reconstructed images of maximum intensity projection (MIP) for membranous labyrinth and internal auditory meatus in Chinese adults were observed and measured in order to provide anatomic basis for otolosurgery and nerosurgery. Methods Thirty inner ears of 15 volunteers were scanned by using a circular temporal coil and three-dimension fast spin echo sequence with a 1^5T GE-signal MRI scanner. All original images were transferred to MRI workstation and all the structures of inner ear were reconstructed, rotated from various angles and measured by using maximum intensity projection. All the data were analyzed using SPSS 10.0 software. Results Anatomic structures of membranous labyrinth and internal auditory meatus were well demonstrated in three-dimensional reconstructed images of MIP in all volunteers. All three semicircular ducts, utricle, saccule, cochlear duct and internal auditory meatus produced high intensity signal. The results of measurement were statistically in significant.Conclusion Three-dimensional reconstruction of MlP might document, lively, stereoscopically and directly, the minute structures of membranous labyrinth and internal auditory meatus. We provide the basic data for the establishment of the MRI measurement criterion of inner ear.