颈椎MRI TIRM技术和SPAIR技术的对比研究

Cervical spine MRI:comparison of TIRM with SPAIR technology

目的:对比分析TIRM技术和SPAIR技术在颈椎磁共振成像的优缺点。方法:选择健康志愿者20例(年龄20～40岁,男女各10例),采用Siemens Magnetom Avanto1.5T磁共振成像系统,分别使用TIRM技术和SPAIR技术行颈椎磁共振成像。由2位高年医师对图像质量采用双盲法评分,应用配对t检验进行统计学分析。结果:SPAIR技术所获图像优于TIRM技术所获图像,两组图像的椎体、脊髓、脑脊液评分差异存在显著性意义(t值分别为12.389、13.043和16.175,P<0.05)。软组织的评分无统计学差异(t=2.096,P>0.05)。尤其是在TIRM成像时,颈髓常有伪影,影响诊断。结论:为了获得清晰满意的颈椎磁共振脂肪抑制技术图像,特别在需要同时诊断椎体和脊髓病变时,应该采用SPAIR技术。

Objective：To compare the merit and shortcoming of TIRM and SPAIR on cervical spine MRI.Methods：20 volunteers （aged 20～40 years,male：female=1：1） were studied with Siemens Magnetom Avanto 1.5T system.Using both TIRM and SPAIR sequences.The imaging quality of TIRM and SPAIR were evaluated by two radiologists blindly,and their difference was tested with matched T test.Results：The MR images from SPAIR were superior to those from TIRM.There were significant difference of imaging score on vertebral body,spinal cord,cerebral spinal fluid and soft tissue.The T values were 12.389,13.043,16.175 and 2.096 respectively,and all their P values were less than 0.05.There were lots of artifacts of TIRM on spinal cord which might make diagnosis difficult,but this could be overcome by SPAIR.Conclusion：TIRM should be replaced by SPAIR on cervical MRI,especially when diagnosis of both spinal body and spinal cord diseases is needed.