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目的:评价弥散加权磁共振成像(diffusion-weighted magnetic resonance imaging,DWI)、液体衰减反转恢复序列(fluid-attenu-ated inversion recovery,FLAIR)及磁共振血管成像(magnetic resoance angiography,MRA)对急性脑梗死患者的临床诊断价值。方法:回顾性分析61例已确诊为急性脑梗死患者的临床资料及磁共振表现,包括DWI、FLAIR及MRA等,临床及MRI相结合分析。结果:对急性脑梗死,DWI出现异常信号的时间最早,可在超早期显示T2WI不能显示的病灶;FLAIR序列对脑室旁的病灶显示更清楚;MRA则能快速发现血管闭塞的部位或狭窄程度。结论:DWI、FLAIR与MRA联合检查可同时显示脑实质和脑血管情况,为脑梗死的定位诊断,脑卒中的分型、早期治疗等提供了可靠的影像学资料。
Objective: To evaluate the value of diffusion-weighted magnetic resonance imaging (DWI), fluid-attenuated-reverse recovery (FLAIR) and magnetic resonance angiography (MRA) Clinical diagnosis of patients with cerebral infarction. Methods: The clinical data and MRI findings of 61 patients with acute cerebral infarction were retrospectively analyzed, including DWI, FLAIR and MRA. The clinical and MRI findings were analyzed. Results: In acute cerebral infarction, DWI had the earliest abnormal signal, which could show the incapable T2WI in the early stage. The FLAIR sequence showed more clearly the lesions in the paraventricular nucleus. The MRA could quickly find the site of the vascular occlusion or the degree of stenosis. Conclusion: The combined examination of DWI, FLAIR and MRA can show the brain parenchyma and cerebrovascular status at the same time. It provides a reliable imaging information for the diagnosis of cerebral infarction, the classification of stroke and early treatment.