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目的阐明弥散成像技术诊断超急性、急性期脑梗塞的优越性。方法应用GE0.2T磁共振机,采用平面回波成像(EPI)的弥散成像技术,并结合传统M成像技术(如T1WI、T2WI)分析115例早期脑梗塞患者的图像特点。结果8例超急性期脑缺血病例中,弥散成像序列显示为高信号,而常规的T1WI、T2WI序列病变区信号无明显变化,107例急性期脑梗塞病例,弥散成像序列及T2WI序列显示为高信号、略高信号,T1WI序列显示为低信号、略低信号。结论超急性期、急性期脑梗塞患者核磁检查尤为必要,而弥散成像序列对脑缺血病变高度敏感,可发现超急性期、急性期脑梗塞。
Objective To clarify the superiority of diffusion imaging in the diagnosis of hyperacute and acute cerebral infarction. Methods The images of 115 patients with early cerebral infarction were analyzed by diffusion imaging with plane echo imaging (EPI) and conventional M imaging (such as T1WI and T2WI) with GE0.2T magnetic resonance imaging machine. Results In 8 cases of hyperacute cerebral ischemia, diffuse imaging showed high signal intensity, while there was no obvious change in routine T1WI and T2WI lesions. 107 cases of acute cerebral infarction, diffuse imaging and T2WI showed High signal, slightly higher signal, T1WI sequence shows low signal, slightly lower signal. Conclusions The MRI examination of patients with hyperacute and acute cerebral infarction is especially necessary. The diffuse imaging sequence is highly sensitive to cerebral ischemia and can be found in hyperacute and acute cerebral infarction.