磁共振成像对颅脑弥漫性轴索损伤的诊断价值

Diagnosis value of magnetic resonance imaging in brain diffuse axonal injury

目的研究颅脑弥漫性轴索损伤(DAI)的磁共振成像诊断价值。方法收集14例经临床证实的DAI的磁共振影像资料进行回顾性分析,14例患者全部行CT检查。结果 DAI的磁共振影像表现:114例T1WI序列及扩散加权成像序列(DWI)上显示弥漫性脑水肿、脑肿胀;2全部病例应用磁敏感加权序列(SWI)显示多发小斑点状脑出血,位于中央或周边的灰白质交界、胼胝体上及大脑脚处;35例显示小脑幕下疝。讨论MRI早期可表现出DAI的病理特征,弥补了CT的局限性,对临床早期诊断、治疗以及评价预后具有重要价值。

Objective To study the diagnostic value of magnetic resonance imaging in diffuse axonal injury of brain. Methods Magnetic resonance imaging data of 14 cases were retrospectively analyzed, all of the 14 patients were diagnosed as DAI and checked by CT. Results The magnetic resonance imaging findings of DAh ①14 cases of T1W1 sequence and diffusion weighted imaging sequence （DWI） showed diffuse brain edema, swelling of the brain. ② All the cases by magnetic susceptibility weighted sequence （SWI） showed multiple punctate hemorrhage in the central or peripheral gray white matter junction, the corpus callosi and the pedunculus eerebyi. ③5 cases showed the subtentorial hernia. Conclusion MRI can show the early pathological characteristics of DAI, makeing up for the limitations of CT, which has important value for early diagnosis, treatment and evaluation of prognosis.