低场磁共振DWI和FLAIR在急性脑梗死诊断中的应用探讨

Assessment of Low-field MR DWI and FLAIR in the diagnosis of acute cerebral infarction

目的:探讨低场磁共振弥散加权像技术及液体衰减反转恢复技术在急性脑梗死中的应用。方法:收集82例脑梗死患者,其中急性期40例,亚急性期29例,慢性期13例,全部均行常规T1WI、T2WI、FLAIR、DWI扫描,检查评价病变的显示范围、边界及对比度。结果:FLAIR序列和DWI对病变的显示范围,均优于常规T1WI、T2WI,以DWI对病变显示更佳。结论:FLAIR序列和DWI在急性脑梗死诊断中优于常规T2WI序列,尤以DWI技术对急性脑梗死病变敏感性最高,且能对急性脑梗死作定量评价。

Objective： To determine the value of low - field magnetic resonance fluid - attenuated inversion - recovery （FLAIR） technique and diffusion - weighted imaging （DWI） technique in the diagnosis of acute cerebral infarction. Methods： Eighty -two patients with cerebral infarction, including 40eases in acute stage, 29 cases in subacute stage, 13cases in chronic stage, underwent routine MR examination through T1WI, T2WI, FLAIR, DWI scan to detect the scope of lesions, border and contrast. Results： Of the detection of the scope of lesions, FLAIR and DWI were better than routine T1WI, T2WI, especially the DWI. Conclusion： FLAIR and DWI techniques are better than T2WI in the diagnosis of acute cerebral infarction; DWI technique has higher sensitivity in the diagnosis of acute cerebral infarction, and may undergo quantitative evaluation of acute cerebral infarction.