动态对比增强MRA对门静脉海绵样变性的诊断

目的:探讨动态对比增强(DCE)MRI和对比增强MRA(DCE-MRA)诊断门静脉海绵样变性(CTPV)的价值及临床意义。方法:28例CTPV患者均行MR动态对比增强及动态对比增强MRA检查,分析所有病例MR动态增强、DCE-MRA表现及特征。结果:CTPV的MRI平扫时可见门静脉闭塞,闭塞门静脉周围可见由侧支静脉形成的团块状、网状异常软组织信号影。动态MR增强动脉期见肝实质灌注异常,门静脉期见异常侧支静脉强化,3DDCE-MRA显示上述异常改变,行DSA检查病例DCE-MRA与DSA表现一致。结论:CTPV具有特征性的MR动态增强、DCE-MRA表现,对CTPV的诊断及鉴别诊断具有重要价值,对临床制定治疗方案具有重要意义。

The Diagnosis of MR Dynamic Contrast Enhancement MRA in Cavernous Transformation of Portal Vein

Objective: To investigate the MR dynamic contrast enhancement and dynamic contrast-enhanced magnetic resonance angiography (DCE-MRA) features of cavernous transformation of portal vein (CTPV),and to evaluate the clinical value of MR DCE and DCE-MRA.Methods:MR plain scan,dynamic contrast enhancement and DCE-MRA were performed in 28 patients with CTPV,the MR plain scan,dynamic contrast enhancement and DCE-MRA features of CTPV were reviewed retrospectively.Results:The features of CTPV:The obstruction of portal vein was shown in plain scan,abnormal agglomerative and reticular soft tissue signals could be visualized in plain scan too.Abnormal perfusion of liver parenchyma could be seen in arterial phase during MR dynamic enhancement,abnormal collateral branch veins were enhanced during the portal phase.The above-mentioned alterations were displayed directly in DCE-MRA.Conclusion:CTPV has characteristic MR dynamic contrast enhancement and DCE-MRA features,MR dynamic contrast enhancement and DCE-MRA are important in the diagnosis and differentiated diagnosis of CTPV,and are important in clinical planning.