背侧腰椎管内椎间盘髓核游离低场MRI表现

The expression of the dorsal lumbar spinal intervertebral disc nucleus pulposus prolapse in low field MRI

目的:评价低场MRI对椎间盘髓核游离背侧腰椎管内的诊断价值。方法:分析10例0.2T低场MRI诊断,经手术、病理证实背侧腰椎管内的椎间盘髓核游离。结果:腰椎间盘髓核游离好发部位多在L4~5、L5~S1椎间盘平面,脱出的髓核与母椎间盘不相连续,形成腰椎管背侧内圆形或卵圆形的孤立团块,呈长或等T1、T2信号,边界清楚。Gd-DTPA增强多不强化,少部分边缘强化。结论:MRI是诊断背侧腰椎管内椎间盘髓核游离的有效方法。应与脊膜瘤、神经鞘瘤、神经纤维瘤、硬膜外血肿和硬膜外脓肿等相鉴别。

Objective:To explore the diagnostic value of low field MR in dorsal lumbar spinal intervertebral disc nucleus pulposus prolapse.Methods:To analysis of 10 cases of 0.2T low field MRI,the dorsal lumbar spinal intervertebral disc nucleus pulposus prolapse were confirmed by operation and pathological diagnosis.Results:Lumbar intervertebral disc nucleus pulposus predilection site was in L4~5and L5~S1disc plane.The nucleus pulposus and herniated intervertebral disc is not continuous,and it make round or oval isolated clumps in Lumbar spinal dorsal.Its signal is long and equivalent T1,T2 signal with clear boundary.Gd-DTPA enhancement most is not enhanced,and few edge enhancement.Conclusion:MRI is a useful way to diagnose the dorsal lumbar spinal intervertebral disc nucleus pulposus prolapse.It should identify with meningiomas,schwannomas,neurofibroma,epidural hematoma and epidural abscess.