磁共振弥散成像对急性脑梗死的诊断价值

目的探讨磁共振弥散成像对超急性、急性脑梗死的诊断价值。方法对80例疑似急性期脑梗死患者，行磁共振常规T1WI、T2WI、水抑制序列（FLAIR）、弥散加权扫描（DWI）。结果80例中，超急性期脑梗死10例，急性期32例，超急性期、急性期脑梗死在DWI上表现为高信号，T2WI上为等信号或部分稍高信号，ADC图上表现为低信号。MRI扫描未见异常2例。结论磁共振弥散成像对超急性期、急性期脑梗死病变较常规MRI敏感，在多发梗死灶中可以发现责任病灶、为临床选择治疗方案提供依据。

Diagnostic Value of Diffusion-weighted Magnetic Resonance Imaging in Acute Cerebral Infarction

Objective To investigate the value of diffusion-weighed magnetic resonance imaging （MRI） in the diagnosis of super-acute and acute cerebral infarction. Methods Eighty cases of suspected super-acute and acute cerebral infarction were scanned using conventional MRI T1WI, T2WI, FLAIR and DWI （diffusion-weighed imaging）. Results In the 80 cases, there were 10 super-acute, 32 acute and 2 normal ones. Super-acute and acute cerebral infarction appeared as the areas of high intensity on DWI, normal or slightly high intensity on T2WI, and low intensity on ADC mapping. Conclusion Compared with conventional MRI, diffusion-weighed MRI is sensitive to super-acute and acute cerebral infarction. In multi-infarcted lesions, acute lesions can be distinguished from non-acute ones, and the lesion site of responsibility can be detected. It contributes to provide the basis for the clinical treatment programs.