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目的总结脑梗塞的磁共振弥散成像表现，非比较弥散成像技术与传统磁共振成像（MRI）技术（如MRT1WI、T2WI及FLAIR序列）在急性期脑梗塞诊断方面的差别，阐明弥散成像诊断急性期脑梗塞的优越性。方法应用基于平面回波成像（EPI）的弥散成像技术，并结合传统MR成像技术（如MRT1WI、T2WI及FLAIR序列）分析17例脑缺血发作2小时至2天病人图像特点。结果弥散成像最早在梗塞发生2小时发现病灶，表现为缺血区的局限性高信号影，边界清楚。发病时间在6小时以内者共7例（41.18％），弥散成像均能清楚显示病灶，而传统MR成像技术本能显示；发作时间在6小时至2天者共10例（58．82％），弥散成像和传统MR成像技术均能显示病灶，其中7例（70．00％）弥散成像显示的范围要大于同层面T2WI像。结论弥散成像在检测和定位急性期脑梗塞方面较为敏感，这对于指导临床治疗和促进预后均有很大的价值。
Objective To summarize the performance of magnetic resonance diffusion imaging (MRI) of cerebral infarction and compare the difference of diffusion imaging with traditional magnetic resonance imaging (MRT1WI, T2WI and FLAIR sequences) in the diagnosis of acute cerebral infarction. The superiority of cerebral infarction. Methods The imaging features of 17 patients with ischemic stroke from 2 hours to 2 days were analyzed with diffusion imaging based on planar echo imaging (EPI) and traditional MR imaging techniques (such as MRT1WI, T2WI and FLAIR sequences). Results As early as 2 hours after infarction, diffuse imaging showed lesions with high signal intensity in the ischemic area and clear boundary. The onset time was less than 6 hours in 7 cases (41.18%). Diffusion-weighted imaging showed clear lesions. The traditional MR imaging technique showed that the onset time was between 6 and 2 days (58.82%), Both diffuse imaging and traditional MR imaging showed lesions, of which 7 cases (70.00%) showed larger range of diffusion imaging than the same level of T2WI images. Conclusion Diffusion imaging is more sensitive in the detection and localization of acute cerebral infarction, which is of great value in guiding clinical treatment and promoting prognosis.