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目的:研究急性梗塞MRI检查序列选择。材料与方法:选取2006年3月～2007年2月临床怀疑脑梗塞、发病时间在<14d的MR检查者116例,MR序列选择T_1WI、T_2WI、T_2W-FLAIR、DWI,重点观察FLAIR及DWI诊断价值。结果:116例中,111例(111/116)诊断为脑梗塞,5例(5/116)经临床证实为TIA。DWI共检出新病灶73例84个病灶(73/111),其中36(36/84)个病灶在T_1WI、T_2WI、T_2W-FLAIR未见显示。FLAIR共检出腔梗灶或软化灶75例(75/111),其对皮层下梗塞灶显示优于T_2WI。结论:对临床怀疑急性脑梗塞者应行有T_2W-FLAIR、DWI序列的头颅MRI检查。
Objective: To study the sequence of acute infarction MRI examination. MATERIALS AND METHODS: One hundred and sixteen patients with suspected cerebral infarction from March 2006 to February 2007 were enrolled in this study. Totally 116 MR patients with morbidity of <14 days were selected. TlWI, T_2WI, T_2W-FLAIR and DWI were selected for MR. FLAIR and DWI value. Results: In 116 cases, 111 cases (111/116) were diagnosed as cerebral infarction and 5 cases (5/116) clinically confirmed as TIA. There were 73 new lesions and 84 lesions (73/111) in DWI. 36 (36/84) lesions were not detected in T 1WI, T 2WI and T 2W-FLAIR. FLAIR detected 75 cases of luminal or softening lesions (75/111), which showed superior to subcortical infarct lesions than T_2WI. Conclusions: The brain MRI of T_2W-FLAIR and DWI sequences should be performed in patients with suspected acute cerebral infarction.