超低场强MRI对肝硬化大结节诊断问题的探讨

目的 探讨超低场强MR对肝硬化大结节（LCN）的诊断价值。材料与方法 27例LCN均用0．2T MR仪,体线圈,常规SE序列T1WI和T2WI。16例经病理证实,11例经综合影像及临床随访诊断。结果 27例LCN中,T1WI上呈稍高信号22例,等信号4例,稍低信号1例;T2WI呈稍低信号16例,等信号11例,信号不均1例。T1WI及T2WI上均见纤维间隔14例,仅在T1WI上见纤维间隔者12例,未见间隔者1例。6例2次以上MR随访,平均间隔时间6．8个月,均未见明显信号变化。结论 结论 MRI对LCN诊断与鉴别有重要实用价值。

Evaluation of Low-field MR Imaging in the Diagnosis of Larger Cirrhotic Nodules

Objective　To evaluate low-field MRI in the diagnosis of larger cirrhotic nodules (LCN).　Materials and Methods　SE T1WI and FSE T2WI sequences with a 0.2T MR unit were performed in 27 patients with LCN, including 22 men and 5 women, aged 1～70 years (mean 51). The diagnosis was pathologically proved in 16 and clinically proved in 5 cases.　Results　On T1WI, slight-high signal intensity was seen in 22 cases, while iso-intensity in 4 and slight-low intensity in 1. On T2WI, slight-low signal intensity was seen in 16 cases, while iso-intensity in 11 and heterogeneous intensity in 1. Fibrous septum was displayed on both T1WI and T2WI in 14 cases, on T1WI only in 11 cases. Fibrous septum was not demonstrated in one case. No obvious changes in signal intensity was found during a following-up period of 1～18 months in 6 cases.　Conclusion　MR imaging is of great clinical value in diagnosing and differentiating LCN.