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目的：分析新生儿缺氧缺血性脑病（HIE）的MRI表现特点。材料与方法：采用永磁型低场磁共振成像系统（0．15T）对足月顺产的正常新生儿20例和临床诊断的HIE患儿90例进行检查。HIE组病人的临床分度分别是轻度40例、中度38例和重度12例。结果：正常组新生儿的脑灰白质对比清楚，以T2加权像最明显。HIE组病人脑内均有片状的异常信号病灶，T1加权像为低信号，T2加权像为高信号，均伴有皮层灰质与白质的对比模糊或消失；83例见于2个脑叶以上；86例呈对称分布。26例见蛛网膜下脑出血，20例见白质病灶内出现点片状出血。结论：MRI对新生儿HIE的诊断有重要意义。
Objective: To analyze the MRI features of neonatal hypoxic-ischemic encephalopathy (HIE). Materials and Methods: Twenty permanent normal neonates and 90 clinically diagnosed HIE patients were examined by a permanent magnet low field magnetic resonance imaging system (0.15T). The clinical scores of HIE patients were mild 40, moderate 38 and severe 12, respectively. Results: Compared with the normal group, the gray matter of newborn was clearly compared with T2 weighted images. There were flaky abnormal signal lesions in the brain of patients in HIE group. T1 weighted images were low signal and T2 weighted images were high signal, which were accompanied by vague or disappearing contrast of cortical gray matter and white matter; 83 cases were found in more than 2 lobes; 86 cases were symmetrical distribution. 26 cases see subarachnoid hemorrhage, 20 cases of white matter lesions appear flaky bleeding. Conclusion: MRI is of great significance in the diagnosis of neonatal HIE.