磁敏感加权成像在脑外伤中的应用

The Usefulness of Susceptibility-weighted Imaging in Traumatic Brain Injury

目的:评价高分辨率的磁敏感加权成像(SWI)技术检测脑外伤患者中出血性病灶的能力。方法:34例成年脑外伤患者,根据临床格拉斯哥昏迷评分(GCS)分为轻度及中重度脑外伤。所有的患者行CT、常规MRI及弥散张量成像(DTI)和SWI检查,分别检测各方法所示患者脑内出血灶数量。结果:SWI共显示1040个出血灶,较常规序列及DTI显示更多,差异有明显统计学意义。SWI病灶数与GCS评分有明显相关性(r=-0.533,P=0.001)。结论:SWI较常规MRI及DTI能检测出更多及更小的出血灶,可以进一步提高对弥漫性轴索损伤(DAI)的诊断,帮助临床医生早期诊断、治疗、治疗监测及评估预后情况。

Purpose：To evaluate the effectiveness of a high-spatial-resolution susceptibility-weighted imaging（SWI） in detecting hemorrhages in traumatic brain injury（TBI） patients.Methods：Thirty-four patients were divided into two groups,which had mild and moderate-severity by Glasgow coma scale （GCS） scores.All the patients were imaged after injury.SWI,diffusion-tensor imaging（DTI）,conventional MR imaging and CT were performed.Results：SWI described 1040 lesions in all,much more than the other image sequences.The number of lesions on SWI was correlated with GCS score（P0.05）. Conclusion：SWI depicts more small hemorrhagic lesions than conventional MRI,DTI and CT does,therefore SWI has the potential to improve diagnosis of TBI and evaluate their prognosis.