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目的 :探讨流行性乙型脑炎磁共振(MRI)不同序列(常规序列、FLAIR序列、DWI序列等)的表现,方法 :回顾性分析我院经临床确诊的30例乙型脑炎患者的MRI表现,比较乙型脑炎常规序列(T1、T2)、FLAIR序列及DWI序列的敏感性及特异性。结果 :26例患者病灶主要累及丘脑、脑干、基底节区:22例病灶呈对称性分布,片状、斑片状稍长T1稍长T2信号改变,FLAIR序列呈高信号,弥散呈高信号,ADC减低,4例常规序列无异常,DWI序列呈稍高信号;4例患者病灶累及海马及脑表面皮质,仅FLAIR序列及DWI序列呈稍高信号,ADC略显减低。结论 :MRI是诊断乙型脑炎非常有效的影像学检查方法,FLAIR序列及DWI序列能更有效及更早期诊断病灶。
Objective: To investigate the MRI manifestations of different sequences (routine sequence, FLAIR sequence, DWI sequence, etc.) in patients with Japanese encephalitis.Methods: A retrospective analysis of MRI findings of 30 patients with Japanese encephalitis Performance, comparison of encephalitis routine sequence (T1, T2), FLAIR sequence and DWI sequence sensitivity and specificity. Results: Twenty-six patients mainly involved the thalamus, brainstem and basal ganglia: the distribution of lesions was symmetrical in 22 cases. The slightly longer T1 and longer T2 signals in the patchy and patchy sections were changed. The FLAIR sequences showed high signal and high diffuse signal , ADC decreased, and no abnormalities were observed in 4 cases. DWI showed a slightly higher signal. In 4 cases, the lesion involved the hippocampus and the cerebral cortex. Only FLAIR and DWI showed slightly higher signal intensity and ADC slightly lower. Conclusion: MRI is a very effective method for the diagnosis of Japanese encephalitis. FLAIR sequence and DWI sequence can be more effective and early diagnosis of lesions.