双下肢动脉磁共振血管成像检查技术改良  

The Improvement of the Peripheral Vascular Magnetic Resonance Angiography

作　　者：赵强[1] 王筝[1] 曹海勇[2] 

机构地区：[1]北京大学第三医院放射科,北京100191 [2]首都医科大学设备与实验室管理处,北京100069

出　　处：《中国医疗设备》2011年第7期149-152,148,共5页China Medical Devices

摘　　要：目的优化双下肢动脉3D CE-MRA扫描参数,以清晰显示各段动脉。方法对180例疑有双下肢动脉病变的患者,随机分为两组,行双下肢动脉自动移床3D CE-MRA检查。一组使用透视触发方法,另一组使用反椭圆中心填充法,然后进行最大信号强度投影重建和多层面重建。结果所有病例均顺利完成检查,共显示了2880支动脉段(100%显示率)。反椭圆中心填充法对腘动脉、胫前动脉及胫后动脉显示全部达到3或4分,平均得分分别为3.8分、3.8分及3.7分;透视触发法腘动脉、胫前动脉及胫后动脉平均得分分别为2.0分、2.1分及2.0分。结论反椭圆中心填充法三维对比增强磁共振血管成像技术,可以显著缩短从开始注射对比剂到启动小腿段扫描时间,能清楚显示小腿段动脉及其分支,对诊断下肢动脉病变有重要作用。Objective Optimize the scanning parameters of the peripheral vascular MR angiography to clearly depict the calf arteries.Methods 180 patients with suspected abnormality of the peripheral arteries underwent auto-moving bed three-dimensional contrast enhanced magnetic resonance angiography,and all cases were randomly divided into two groups： one used the fluoroscopy triggering method,another used the reverse elliptical centric view order method.Then maximum intensity projection（MIP） and multiplanar reconstruction（MPR） were performed.Results All cases were successfully accomplished.The result shows a total of 2880 branches of arteries（the display rate is 100%）.Popliteal artery,anterior tibial artery and posterior tibial artery were shown well by the reverse elliptical center filling method,that the average score is 3.8 points,3.8 points and 3.7 points separately.But the average score is 2.0 points,2.1 points and 2.1points separately by the fluoroscopy triggering method.Conclusion The reverse elliptical centric view order three-dimensional contrast enhanced magnetic resonance angiography can significantly shorten the time between the start of the injection of contrast agent and initiation of scanning of the calf segment,so it can clearly depict the calf segment arteries.It is an important role in the diagnosis of lower extremity artery diseases.

关 键 词：磁共振扫描仪 磁共振血管成像 反椭圆中心填充法 透视触发法 

分 类 号：R445.2[医药卫生—影像医学与核医学]