摘要
目的 :评价MRI平扫及Gd -DTPA动态增强对射频治疗肝细胞癌疗效随访的价值。材料和方法 :回顾性分析了55例RF术前及术后的MRI表现 ,并与活检及长期随访结果进行对照。结果 :RF术前病灶在T1 加权上多呈相对低信号、T2 加权像上呈相对高信号 ,RF术后病灶转变成T1 加权较高信号、T2 加权均匀一致的等低信号 ,残存的癌结节表现为病灶周围包膜不规整或周边小结节并在动态增强时呈单峰型“快进快出”强化表现 ,活检提示癌灶残存。结论 :MR平扫评价RF的疗效基本可靠 ,动态增强能进一步提高评价信心及准确率。RF术后定期MR随访具有重要意义。
Purpose:To determine the value of plane and dynamic enhanced MR imaging after contrast of Gd-DTPA in follow-up of hepatocellular carcinoma(HCC) treated with radiofrequency(RF).Materials and Method:55 lesions were examined with MR imaging before and after RF.MR imagings were correlated with results of fine-needle aspiration biopsy and long time follow-up.Results:Signal of 55 lesions changed from relative hypointensity to hyperintensity on T1-weighted images and hyperintensity to homogenous hypointensity on T2-weighted images after RF and there was no enhancement on dynamic contrast-enhanced MR imaging.Residual viable tumor showed irregular of the envelope or small nodular and have obvious 'single-peak' enhancement on dynamic scanning,which were confirmed by pathology.Conclusion:The findings on dynamic MR imaging increase the confidence and accuracy of unenhanced MR imaging which is basically reliable in evaluation of effectiveness after RF.The follow-up of hepatocellular carcinoma treated with RF using MR imaging has great significance.
出处
《中国医学计算机成像杂志》
CSCD
2001年第5期331-334,共4页
Chinese Computed Medical Imaging
关键词
射频治疗
肝细胞癌
磁共振成像
Radiofrequency Hepatocellular carcinoma Magnetic resonance imaging
