磁敏感加权成像在脑外伤中的应用

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.

The Usefulness of Susceptibility - weighted Imaging in Traumatic Brain Injury

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(P < 0.05). 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.