摘要
目的探讨3.0TMR扩散加权成像(DWI)b0图像对急性脑出血的诊断价值。方法回顾性分析105例发病3天内接受第1次MR检查、并在我院住院治疗确诊的急性脑卒中患者的影像学资料。以同期梯度回波序列为标准,评价DWIb0图像诊断出血的敏感度及可靠性。结果105例患者中,急性脑出血48例,DWIb0图像清晰显示其中47例,诊断急性脑出血的敏感度为97.92%,特异度100%,阳性预测值100%,阴性预测值98.25%。血肿核外层环状低信号是较早期血肿的共同特征,环状低信号在DWIb0图像上显示最佳,其次是梯度回波序列。结论3.0TMRDWI可以明确区分急性出血性和非出血性脑卒中。DWI及常规T1WI、T2WI的快速成像方案可以快速、准确地判断脑出血,有助于临床治疗方案的制定。
Objective To investigate the value of diffusion weighted imaging （DWI） in detecting acute intracerebral hemorrhage with 3.0T MR. Methods A total of 105 patients with acute strokes underwent MR examination within 3 days after on set. The detectability and reliability of intracerebral hemorrhage with the DWI b0 sequence was assessed. The results were compared with the gradient-echo （GRE） sequence. The results of the GRE sequence were used as the standard. Results DWI b0 images of 47 cases displayed clearly in 48 acute intracerebral hemorrhage patients. For the detection of acute intracerebral hemorrhage, DWI b0 images had a sensitivity of 97. 92%, specificity of 100%, the positive predictive value of 100%, and the negative predictive value of 98.25 %. Deoxyhemoglobin-induced hypointense rim was characteristic on DWI b0 images, the next was GRE. Conclusion In the setting of acute stroke, DWI can clearly distinct intracerebral hemorrhage and non-intraeerebral hemorrhage with 3.0T MR scanner. With a more rapid and accurate MRI strategy to evaluate acute stroke including DWI, T1WI and T2WI sequences without GRE is helpful in clinical decision making.
出处
《中国医学影像技术》
CSCD
北大核心
2010年第2期254-257,共4页
Chinese Journal of Medical Imaging Technology
关键词
脑出血
磁共振成像
扩散加权成像
Cerebral hemorrhage
Magnetic resonance imaging
Diffusion weighted imaging
