磁敏感加权成像在弥漫性轴索损伤中的临床价值

[摘要] 目的: 探讨SWI序列对于DAI的诊断价值,并比较SWI与T2*序列对于诊断DAI合并出血的敏感性。方法: 对20例临床确诊DAI有颅内少量出血的患者进行T2*序列及SWI序列扫描。结果: 20例DAI的颅内微小出血，对病变显示、静脉血管显示的评分上SWI分别为2.8,2.8；T2*为2.0,2.3；T2为2.2,0；T1为1.7,0。SWI分别与T2*,T2,T1的评分结果比较，差异有统计学意义(P值<0．01)。所有病灶出血SWI序列均得到明确显示，磁敏感加权成像检测到一个平均76 ± 52的参差不齐低信号病灶，而在T2*加权成像则为21 ± 19。(P<0.01，配对t检验) 结论: SWI序列对检测DAI合并出血的敏感性明显高于T2*序列。[关键词] 磁敏感加权成像；弥漫性轴索损伤；微出血；

Susceptibility-weighted imaging for the clinic value of diffuse axonal injury

【Abstract】Objective: To study the diagnostic value of susceptibility weighted imaging(SWI)in the cerebral microhemorrhage with DAI,To compare the sensitivity to detect microhemorrhage between T2* and SWI sequence．Methods: Twenty cases with cerebral microhemorrhage of DAI underwent T2* and SWI sequence. Results: Twenty cases of microhemorrhage DAI，the lesions showed that the veins show ratings on SWI were 2.8,2.8；T2 * for the 2.0,2.3； T2 for 2.2,0； T1 as 1.7,0. SWI respectively with T2 *, T2, T1 rating results, the difference was statistically significant (P <0.01). All lesions bleeding SWI sequences were obtained clearly showed that the SWI to detect an average of 76 ± 52 of the mixed low signal intensity, while in T2 *-weighted imaging, compared with 21 ± 19. (P <0.01, paired t test)Concusion: SWI was superior to the conventional T2* for cerebral microhemorrhage with DAI.【Key word】 susceptibility-weighted imaging, diffuse axonal injury, microhemorrhage