MR三维动态增强成像在下肢动脉血管的临床应用

目的探讨三维增强MR血管成像（contrast-enhanced MR angiography，CE—MRA）在腹部及下肢动脉病变的临床应用价值。材料与方法对30例疑有下肢血管病变的患者行CE—MRA。采用德国Siemens Essenza 1．5T全身MR扫描仪，Body线圈，运用3D快速小角度激发成像（FLASH）扫描序列，自动移床采集双下肢血管图像。结果3DCE-MRA可直观、完整地显示腹腔、盆腔和下肢动、静脉正常结构和疾病分布情况。30例患者中，动脉硬化狭窄20例，动脉瘤2例，动脉瘘1例，动静脉畸形1例，动脉变异1例，髂静脉压迫综合征2例；正常3例。结论3DCE—MRA对腹部及下肢大血管病变显示良好，能清楚显示血管本身病变、病变与血管、血管与周围组织的关系，具有很好临床实用价值。

Dynamic contrst-enhanced magnetic resonance angiography in vascular diseases of abdomen and lower extremities:technique and clinical application

Objective:To explore the method of 3D CE-MRA in demonstrating arterial diseases from abdomen to lower extremity.Materials and Methods:Thirty patients underwent 3D CE-MRA at SIEMENS ESSENZA 1.5 T system with 3DFLASH sequences and parallel acquisition technique using the body coil.All images were reconstructed with maximum intensity projection(MIP).Results:3D CE-MRA could clearly show the vascular diseases from the abdomen aorta furcation to the foot artery.Of the 30 patients,20 were found with arteriosclerosis obliterans,2 with angeiomas,1 with artery-vein malformation(AVM),1 with arteriovenous fistula,1 with variant artery abdomen to lower extremity arteries,2 with iliac vein compression syndrome imaging.The CE-MRA images were normal in 3 patients.Conclusion:3D CE-MRA is of great value for macroangiopathy detection,which can show the vascular illness,the relationship between illness and vessels,or relationship between vessels and peripheral tissues.