1.5T MR三维双回波稳态水激发序列显示腰骶神经的初步研究  

Three-dimensional double-echo steady-state with water excitation MR imaging in detection of lumbosacral nerve at 1.5T MR scanner

作　　者：王妍[1,2] 秦毅[2] 张敬[1] 李金亭[2] 刘文涛[2] 

机构地区：[1]天津医科大学总医院,天津300052 [2]天津中医药大学第一附属医院放射科

出　　处：《实用放射学杂志》2012年第4期596-599,共4页Journal of Practical Radiology

摘　　要：目的 探讨磁共振三维双回波稳态水激发序列（3D-DESSWE）在正常腰骶神经成像中的价值.方法 采用1.5T MR 3D-DESSWE序列对22例健康志愿者进行腰骶神经扫描,对源图像进行最大强度投影（MIP）及多平面重建（MPR）,获得后处理图像后与格氏解剖学图谱对照.由2名阅片者协商采用3分法（0~2）对3D-DESSWE序列显示腰骶神经的可靠性进行评估,对两侧腰骶神经主干的长度及脊神经节的长、宽进行测量.结果 所有志愿者两侧腰骶神经主干均获得清晰显示（1~2分）.在3D-DESSWE图像中,腰骶神经呈高信号,周围软组织及骨质结构呈相对低信号.两侧的腰骶神经长度、脊神经节大小及显示评分无显著差别（P〉0.05）.结论 3D-DESSWE序列可以清晰显示腰骶神经的解剖结构,为描述腰骶神经提供了一种新方法.Objective To explore the wtlue of 3D-DESSWE MR sequence in detection of the normal anatomy lumbosacral nerve. Methods 3D-DESSWE MR sequence was performed in 22 heahhy volunteers at a 1.ST MR unit. The original image data were re constructed in relation to the course of lumbosaeral nerve by using the thin section MlPand MPR programs. The reconstructedima ges were compared with Gray＇s anatomy map. The reliability in showing lumbosacral nerves on reconstructed images was evaluated by two radiologists using an arbitrary scale of 0 2 grades. The lengths of the main trunks of lumbosaeral nerve and dimensions of dorsal root ganglions were measured. Results In all subjects,3D-DESSWE images provided reliable definition of the normal lumbo sacral nerves bilaterally（ score 2 or 1）. The Iumbosacral nerves showed high signal intensity while the surrounding soft tissue and bone structures showed relatively low signal intensity. The lengths of the main trunks of lumbosaeral nerve, dimensions of dorsal root ganglions and scores were no of significant difference between bilateral sides （P〉0. 05 ）. Conclusion 3D-DESSWE MR sequence provides a new method to display the detailed anatomy of the lumbosacral nerve.

关 键 词：磁共振成像 腰骶神经 三维 脊椎 

分 类 号：R445.2[医药卫生—影像医学与核医学] R323.43[医药卫生—诊断学]