正常成人L_4及L_5神经根斜冠状位T_1W MR表现

MRI features of L_4 and L_5 spinal nerve roots in oblique-coronal T_1-weighted imaging

目的:探讨正常成人L4及L5神经根斜冠状位T1W MR成像在脊神经根显示方面的价值。方法:41例正常成人在常规腰骶部MR扫描基础上,沿轴位图像右侧或左侧、L3～L4或L4～L5椎间孔方向、分别行双侧相应神经根斜冠状位T1W MR成像。统计根管内段神经根清晰、不清晰及变异神经根个数。结果:40例共160个脊神经根T1W斜冠状位图像均能清晰、连续显示其根管内段走行,其中1例可见右侧L4和L5神经根共干;1例志愿者斜冠状位图像神经根显示欠清晰。结论:L4及L5神经根斜冠状位T1W MR成像,对神经根在根管内段走行显示清晰,能为临床诊断及治疗提供较大帮助。

Objective：To investigate the value of oblique-coronal T1-weighted imaging of L4 and L5 spinal nerve roots of adult healthy volunteers.Methods：41 adult healthy volunteers were involved in our study.Under the conventional MR imaging of lumbosacral vertebrae,and along the direction of intervertebral foramen of L3～L4 or L4～L5 in axial,the right or left oblique-coronal T1-weighted imaging of corresponding spinal nerve root was performed respectively.Calculate the quantity of the spinal nerve root of distinct,not distinct,and variant.Results：160 spinal nerve roots within nerve root canal of 40 cases,except 4 nerve roots of one case for his imagings were not distinct,were developed distinctly.One variation that the right two spinal nerve roots originated commonly was detected.Conclusion：As the integrated display of spinal nerve roots in nerve root canal,the oblique-coronal T1-weighted imaging of L4 and L5 spinal nerve roots is more beneficial to the diagnosis and treatment of lumbosacral radiculopathy.