目的 分析磁敏感加权成像(SWI)在脑外伤微出血(TMBs)诊断中的应用价值.方法 选取临床脑外伤患者41例,根据临床格拉斯哥昏迷评分(GCS)分为轻度、中重度,行常规磁共振成像(MRI)扫描T1WI、T2WI、弥散加权成像(DWI)序列及SWI序列,比较不同序列对出血灶的检出率以及脑内出血灶数量,分析SWI测得出血灶数与GCS评分的相关性.结果 T1WI、T2WI、DWI序列分别检出18例、25例、31例,SWI序列检出41例,检出率显著高于T1WI、T2WI、DWI序列(χ2=31.97,P<0.01;χ2=19.88,P<0.01;χ2=11.39, P<0.01).T1WI、T2WI、DWI序列分别检出51、58、70个出血灶;SWI序列检出130个出血灶数,显著高于常规MRI序列(χ2=113.48, P<0.01;χ2=99.57,P<0.01;χ2=78.00,P<0.01).相关性分析结果显示,SWI测得出血灶数与GCS评分具有负相关性(r=-0.615, P<0.01).结论 SWI序列能显著提高脑外伤微出血检出率,提高临床对脑外伤的明确诊断,并给予患者及时的治疗,改善患者的预后.%Objective To evaluate the value of SWI for microbleeds in traumatic brain injury. Methods The data of 41 cases clinically confirmed traumatic brain injury were divided into mild group,moderate and severe group according to GCS scores,and were scanned by conventional T1WI,T2WI,DWI and SWI sequence. The numbers of lesions and detection rates were compared. Results 18,25,31 cases were examined by T1WI,T2WI,DWI sequence respectively,while 41 cases were detected by SWI sequence(χ2=31.97,P<0.01;χ2=19.88,P<0.01;χ2=11.39, P<0.01). 51,58,70 lesions were detected by T1WI,T2WI,DWI sequence respectively,while 130 lesions were detected by SWI sequence which was significant compared to conventional MRI sequence(χ2=113.48,P<0.01;χ2=99.57,P<0.01;χ2=78.00,P<0.01). The correlation analysis demonstrated that there was a significant correlation between lesions detected by SWI and GCS scores(r=-0.615,P<0.01). Conclusion SWI obviously elevates the detection rate of microbleeds,improves the clinical diagnosis of brain trauma,and gives patients better treatment to improve patient prognosis.
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