Abstract

目的 探讨利用全局自动校准部分并行采集(GRAPPA)技术行肝动脉高分辨对比增强MR血管成像(CE-MRA)的可行性,评价其对肝动脉显示的价值.方法 对67例原位肝移植受体行GRAPPA三维CE-MRA检查,2名放射科医师独立评价肠系膜上动脉、肝总动脉、肝右动脉、肝左动脉、胃左动脉、胃十二肠动脉、第Ⅳ段肝动脉、右前肝动脉和右后肝动脉的显影质量并行Weighted Kappa分析,并采用4级评分共同评价肝动脉各级分支的显示情况,以手术结果为对照评估肝动脉系统解剖和变异.结果 2名医师对各段动脉显影评分有很好的一致性(Kappa值均>0.75);39例达到肝左、右动脉远端分支4级水平,23例为肝左、右动脉3级水平,4例为肝固有动脉2级水平,1例为肝总动脉1级水平,平均显示级别为3.49.67例中53例正常肝动脉解剖和14例变异在高分辨率MRA图像中得到准确显示.结论 利用GRAPPA技术可获取高分辨CE-MRA肝动脉图像,并且可准确评估肝动脉解剖。

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