超低场强MRI对肝硬化大结节诊断问题的探讨

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

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 2 7例LCN均用 0 .2TMR仪 ,体线圈 ,常规SE序列T1WI和T2 WI。 16例经病理证实 ,11例经综合影像及临床随访诊断。结果 2 7例LCN中 ,T1WI上呈稍高信号 2 2例 ,等信号 4例 ,稍低信号 1例 ;T2 WI上呈稍低信号 16例 ,等信号 11例 ,信号不均 1例。T1WI及T2 WI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 MRI对LCN诊断与鉴别有重要实用价值。

Objective To evaluate low field MRI in the diagnosis of larger cirrhotic nodules (LCN).Materials and Methods SE T 1WI and FSE T 2WI 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 T 1WI, slight high signal intensity was seen in 22 cases, while iso intensity in 4 and slight low intensity in 1. On T 2WI, 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 T 1WI and T 2WI in 14 cases, on T 1WI 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.