磁共振T2加权成像的扫描方位和层厚对亚急性联合变性脊髓内病变显示的影响  

The influence of T2-weighted MRI orientation and slice thickness on lesion demonstration of subacute combined degeneration of the spinal cord

作　　者：徐利军[1,2] 方金洲 王伯胤[1,2] 祝望才[4] 杨正汉[5] 

机构地区：[1]浙江省绍兴市人民医院 [2]浙江大学绍兴医院放射科,312000 [3]浙江省衢化集团医院放射科 [4]湖北省新华医院放射科 [5]卫生部北京医院放射科

出　　处：《中国神经免疫学和神经病学杂志》2012年第2期96-99,共4页Chinese Journal of Neuroimmunology and Neurology

摘　　要：目的探讨不同方位及不同层厚横断面磁共振成像(MRI)T2加权像(T2WI)对亚急性联合变性(SCD)病变显示的影响。方法 24例SCD患者接受了颈髓及胸髓的MRI平扫及增强扫描,T2WI序列包括3mm层厚矢状面、3mm和7mm层厚横断面,经3名放射科医师分别阅读了所有MRI图像。结果 24例患者3mm层厚横断面T2WI像均可见脊髓后索高信号〔显示率为100%(24/24)〕,13例显示侧索病变〔显示率100%(13/13)〕;17例在矢状面T2WI像显示后索病变(显示率为70.8%);7mm层厚的横断面T2WI像显示19例后索病变〔显示率为79.2%(19/24)〕和6例侧索病变〔显示率46.2%(6/13)〕。结论对于SCD脊髓内病变的显示,横断面T2WI优于矢状面T2WI,3mm层厚的横断面T2WI优于7mm层厚的横断面T2WI。Objective To investigate the influence of T2 weighted MR imaging（T2WI） with different orientation and different slice thickness on lesion demonstration of spinal cord in patients with subacute combined degeneration（SCD）. Methods The plain and enhanced MRI（cervical spine and thoracic spinal） were performed in 24 cases with SCD.The T2WI sequences included sagittal imaging（slice thickness,3 mm）and axial imaging（slice thickness,3 mm and 7 mm,respectively）.All MR images were reviewed by 3 radiologists. Results Abnormal hyperintense signal changes were found within posterior columns of spinal cord in all the 24 cases on axial T2WI with 3 mm thickness[100%（24/24）],in 19 cases on axial T2WI with 7 mm thickness[79.2%（19/24）],and in 17 cases on sagittal T2WI[70.8%（17/24）].Abnormal hyperintense signal changes were found within lateral columns of the spinal cord in 13 cases on axial T2WI with 3 mm thickness [100%（13/13）],and only in 6 cases on axial T2WI with 7 mm thickness [46.2%（6/13）]. Conclusions For lesion demonstration of SCD in spinal cord,axial T2WI is superior to sagittal T2WI,and axial T2WI with 3 mm thickness is superior to axial T2WI with 7 mm thickness.

关 键 词：脊髓亚急性联合变性 磁共振成像 

分 类 号：R744.6[医药卫生—神经病学与精神病学]