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目的探讨磁共振弥散成像(DWI)对急性脑梗死诊断价值。方法对68例脑梗死患者的常规MRI、液体衰减翻转恢复(FLAIR)及DWI图像进行比较研究分析。结果超急性、急性和亚急性脑梗死在DWI上均表现为高信号,在超急性脑梗死弥散加权像可显示T_2加权像不能显示的病灶,在T_2 WI及FLAIR加权像可显示的病变中,弥散加权像可更清楚更全面地显示病灶。结论DWI对诊断急性脑梗死十分敏感,能对早期脑缺血做出明确诊断,结合T_2WI及FLAIR可鉴别新旧梗死灶。
Objective To investigate the diagnostic value of magnetic resonance diffusion imaging (DWI) in acute cerebral infarction. Methods 68 cases of cerebral infarction in patients with routine MRI, fluid attenuation inversion recovery (FLAIR) and DWI images were compared and analyzed. Results The hyperacute, acute and subacute cerebral infarction showed high signal on DWI. In the super-acute cerebral infarction, the diffuse weighted image could show the lesion which T 2 weighted image could not display. Among the lesions that T 2 WI and FLAIR weighted images could display, Diffusion-weighted images show the lesions more clearly and completely. Conclusion DWI is very sensitive to the diagnosis of acute cerebral infarction and can make a definite diagnosis of early cerebral ischemia. Combined with T_2WI and FLAIR, DWI can be identified.