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目的旨在分析磁共振弥散加权像对早期脑梗塞诊断的临床价值。方法２４例脑梗塞病人经磁共振成像常规程序和弥散加权程序检查，弥散加权像采用稳态自由进动程序，每层需时５７秒，弥散加权梯度为２３ｍＴ。对同一层面的所有磁共振像进行了比较，重点分析信号强度和病灶大小。数据经统计学分析。结果在超急性脑梗塞弥散加权像可显示Ｔ２加权像不能显示的病灶，在Ｔ２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。在亚急性期，弥散加权像的病灶有可能会呈相对等信号。本组结果略不同以往的动物实验。结论弥散加权像能非常可靠地显示急性脑梗塞。
Objective To analyze the clinical value of MR diffusion-weighted imaging in the diagnosis of early cerebral infarction. Methods Twenty-four patients with cerebral infarction were examined by conventional magnetic resonance imaging procedure and diffusion-weighted procedure. The diffusion-weighted images were obtained using a steady state free precession procedure with 57 seconds per layer and a diffusion-weighted gradient of 23 mT. All MR images of the same level were compared, focusing on signal intensity and lesion size. Data were statistically analyzed. Results in the hyperacute infarction with diffusion weighted images can display T2-weighted images can not show the lesions in the T2-weighted images can show lesions, diffusion-weighted images can be more clearly and more comprehensive display of lesions. In the subacute stage, diffuse weighted images of lesions may show a relative signal. This group results slightly different from the previous animal experiments. Conclusion DWI can show acute cerebral infarction very reliably.