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目的探讨磁共振弥散加权成像(DWI)在急性脑梗死诊断中的价值。方法对72例急性脑梗死患者MRI各序列的影像学表现进行对比分析。结果 72例患者中共检出梗塞病灶104个,陈旧性病灶26个,超急性、急性梗塞病灶78个,急性、超急性病灶中,T2WI显示出梗塞灶53个,阳性率67.9%。DWI显示出病灶78个阳性率100%。陈旧性病灶26个呈长T1、长T2信号,DWI上呈等、低信号。结论 DWI对急性梗塞病变应用价值高,较常规MRI中T2WI序列敏感。
Objective To investigate the value of magnetic resonance diffusion-weighted imaging (DWI) in the diagnosis of acute cerebral infarction. Methods 72 cases of acute cerebral infarction in MRI sequences of imaging performance comparison analysis. Results A total of 104 infarcted lesions, 26 obsolete lesions, 78 hyperacute acute infarct lesions were detected in 72 patients. Among the acute and hyperacute lesions, T2WI showed 53 infarcts with a positive rate of 67.9%. DWI showed 78 lesions positive rate of 100%. 26 old lesions showed long T1, long T2 signal, DWI showed the same, low signal. Conclusion DWI has high value for acute infarction and is sensitive to T2WI in conventional MRI.