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目的评价MRIT1WI、T2WI和增强扫描对肝脏恶性肿瘤Hitt射频热凝治疗后疗效的评估。材料和方法从2006年2月到2007年6月,112例行Hitt射频热凝治疗后的MRI表现及不同范围肿瘤治疗后的疗效比较。结果Hitt射频热凝治疗前肝脏恶性肿瘤表现为T1WI低、T2WI高,动态增强扫描强化;Hitt射频热凝治疗后典型表现为T1W高、T2W等或低信号,动态增强扫描无明显强化表现。小肝癌组(直径≤3cm)术后1个月半完全凝固坏死率为91.7%,较大肝癌组(3cm<直径≤5cm)术后1个月半完全凝固坏死率为80%。结论MRI扫描各时相改变及动态增强可以准确评估Hitt射频热凝治疗肝癌的疗效,对于临床判断疗效及随访分析具有重要临床价值。
Objective To evaluate the efficacy of MRT1WI, T2WI and enhanced scan in the treatment of liver malignancies after Hitt radiofrequency thermocoagulation. Materials and Methods From February 2006 to June 2007, 112 patients underwent Hitt radiofrequency thermocoagulation after MRI performance and different range of tumor treatment after curative effect comparison. The results showed that the performance of Hitt’s radiofrequency ablation before hepatectomy was low in T1WI, high in T2WI and dynamic contrast enhancement. Hitt radiofrequency thermocoagulation was typical of T1W high, T2W or low signal, but no significant enhancement in dynamic contrast-enhanced MRI. The complete coagulation necrosis rate was 91.7% in the small hepatocellular carcinoma group (diameter≤3cm) at 1 month and half after the operation. The complete coagulation necrosis rate in the large hepatocellular carcinoma group (3cm <5cm in diameter) at 1 month and half was 80%. Conclusion The change of MRI scan and the dynamic enhancement can accurately evaluate the therapeutic effect of Hitt’s radiofrequency thermocoagulation in the treatment of liver cancer. It has important clinical value in clinical judgment and follow-up analysis.