动态增强磁共振门静脉成像及临床应用

目的　探讨动态增强磁共振门静脉成像 (DCE -MRP)技术要点及临床应用优势。方法　 3 1例进行腹部常规扫描时疑有门静脉异常的患者接受了动态增强磁共振门静脉成像扫描 ,其中正常 8例 ,异常 2 3例。使用高压注射器将Gd -DTPA造影剂经手背静脉注入血管 ,应用透视触发造影技术确定扫描延迟时间 ,所有图像分别进行数字减影、最大信号强度投影 (MIP)重建。结果　3 1例患者均获得了清晰、立体的门静脉图像。 8例无肝脏疾患者 ,DCE -MRP均能完整显示门静脉主干及肝内 5级以上的分支。 2 3例异常 ,其中肝硬化门静脉高压 13例 ,均显示门静脉扩张迂曲 ,2例显示门静脉主干闭塞 ;肝癌 9例 ,其中门静脉主干和 (或 )其主分支闭塞 3例 ;肝右叶巨大血管瘤 1例。结论　动态增强磁共振门静脉成像为新的磁共振血管成像技术 ,成像效果与传统的血管造影相仿 ,具有明显的临床应用优势

The Technique of Dynamic Contrast MR Portography and its Clinical Application

Objective To investigate the technique points and application advantages of dynamic contrast enhanced MR portography (DCE-MRP).Methods 11 patients underwent DCE-MRP scanning after routine exarminatien of abdomen and were injected with contrast medium of GD-DTPA. All images were reconstructed with digital substraction angiography (DSA) and maximum intensity projection (MIP). Results All patients got clear images of portal veind of 8 normal cases, main trunk and branches of portal vein were showed with DCE-MRP, of 23 abnormal cases, different portal vein shapes were clearly showed such as dilatation, turtuosity and occlusion. Conclusion DCE-MRP is a new MR technique which has similar imaging effect compared with DSA and will be of obvious clinical application advantages.