急性硬脊膜外血肿的MRI诊断

目的探讨急性硬脊膜外血肿的MRI特征。方法回顾性分析28例经手术或临床随访证实的急性硬脊膜外血肿的MRI表现。结果28例中12例位于颈段,5例位于胸段,11例位于腰段。血肿累及1～11个椎体高度,平均3.5个椎体高度。血肿呈短T、短T2或短长混杂T2信号1者8例,呈等T1、短T2或短长混杂T2信号者16例,呈等短混杂T1、短T或短长混杂T信号者422例。血肿在T1WI上均与脊髓间有低信号线相隔,T2WI上与蛛网膜下腔间有低信号线相隔者12例,不明显者16例。结论MRI对急性硬脊膜外血肿的显示,明确范围及对脊髓受压损伤程度等有明显优势,是目前评价急性硬脊膜外血肿的最佳方法。

The role of MRI in diagnosis of acute spinal epidural hematoma

To study the MR findings of acute spinal epidural hematoma. Methods MR manifestation of 28 patients with acute spinal epidural hematoma were reviewed .All cases were confirmed by operation or clinic. Results 12 of 28cases were in cervical spine, 5 in thoracic spine, 11 in lumbar spine. The craniocaudal extent of the hemotom varies from 1 to 11 vertebral levels, average 3.5vertebral level. 8 cases showed hyper intensity on T1WI, and hypo intensity or inhomogeneous hypo-hyper intensity on T2WI, 16 cases showed isointensity on T1WI, and hypo intensity or inhomogeneous hypo-hyperintensity on T2WI, 4 cases showed inhomogeneous iso-hyperintensity on T1WI and hypointensity or inhomogeneous hypo-hyperintensity on T2WI. On T1WI, There were low signal intensity lines between hematoma and spine cord in all of cases, On T2WI, The low signal intensity line between hematoma and subarachnoid space was demonstracted in 12 cases. Conclusion MRI had obvious advantage in demonstracting the hematoma, Its extentent or the relationship between hematoma and spine cord, It's the best method to the pinal epidural hematoma today.