126例磁共振椎管水成像分析

目的: 探讨磁共振椎管水成像( MRM) 对揭示椎管内梗阻部位及原因的价值及限度。方法: 采用三维快速自旋回波(FSE) 加脂肪抑制技术作冠状面重T2 加权椎管水成像126例, 包括小脑延髓池6 例、颈段18 例、胸段19 例、腰段83 例。所有图像均经三维最大信号强度投影后处理。结果: 90-5 % (114/126) 图像质量优良。MRM 阳性106 人次(101 例,占80-2 % ) , 其中硬膜外病变51 人次、硬膜下病变30 人次、髓内病变23 人次( 共104 人次?) 。66 例手术前后对比, 本组100 % 定位正确, 定性正确率91-3 % 。结论: 重T2 加权FSE 序列MR 椎管水成像是可靠的、非侵袭性的检查方法, 它可代替常规X 线脊髓造影和CT 脊髓造影, 还可解决上述检查无法解决的一些难题

MR MYELOGRAPHY:ANALYSIS OF 126 CASES

Objective:To investigate the value and limitation of MR myelography(MRM)in depicting the spinal canal obstruction.Methods:Heavily T 2 weighted coronal MR myelography was performed with 3 D fast spin echo(FSE) and fat suppression sequence in 126 cases including six cerebellomedullary cistern,18 cervical,19 thoracic,and 83 lumbar studies.The resulting slice were then projected into a composite image by using a standard maxium intensity projection algorithm.Results:90 5%(114/126 cases) MRM yielded reproducible high quality image of the spinal thecal sac.106 lesions(51 extradural,30 intradural,23 intramedullary)were detected in 101 cases(80 2%).The level and degree of spinal canal obstruction were visualized and confirmed in the operation in 66 cases with a high sensitivity of 100% and a diagnostic accuracy of 91 3%.Conclusion:Heavily T 2 FSE MRM is a noninvasive and reliable method.MRM surpasses conventional and CT myelography may replace them in some degree. S