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目的:分析16例不典型肝脓肿低场MRI特征。方法:回顾性分析经临床证实或病理证实的16例不典型肝脓肿的MRI表现,所有病例均行MRI平扫及增强检查。结果:MRI平扫,全部病灶T1WI呈低、稍低信号,T2WI呈高或稍高信号;增强扫描,动脉期、静脉期和延迟期分别依次出现楔形强化、分隔状强化、延迟强化和“花瓣”征。结论:上述征象为不典型肝脓肿在低场MRI中的特征表现。T2WI脂肪抑制序列和动态增强扫描对鉴别诊断有价值。
Objective: To analyze the MRI features of 16 cases of atypical liver abscess. Methods: MRI findings of 16 cases of atypical liver abscess confirmed clinically or pathologically were retrospectively analyzed. All patients underwent plain MRI and enhanced MRI. Results: All the lesions showed low and slightly low signal intensity on T1WI and high or slightly high signal intensity on T2WI in all the lesions. Wedging, segmental enhancement, delayed enhancement and delayed enhancement were observed in enhanced scan, arterial phase, venous phase and delayed phase respectively. Petals "sign. Conclusion: The above signs are typical features of atypical liver abscess in low field MRI. T2WI fat suppression sequence and dynamic contrast-enhanced scan is valuable.