三维高时间分辨率动态增强MR血管成像在临床的初步应用  

Preliminary clinical application of contrast-enhanced MR angiography using three-dimensional timeresolved imaging of contrast kinetics

作　　者：杨春山[1] 张松[1] 刘士远[2] 肖湘生[2] 周康荣[1] 王金林[2] 李惠民[2] 肖珊[2] 龚万庆[2] 

机构地区：[1]复旦大学中山医院放射科,上海200032 [2]第二军医大学附属长征医院放射科

出　　处：《中华放射学杂志》2007年第3期304-307,共4页Chinese Journal of Radiology

摘　　要：目的评价三维高时间分辨率动态增强 MR 血管成像(contrast-enhanced MRangiography using 3D time-resolved imaging of contrast kinetics,CE-MRA 3D-TRICKS)在临床中的应用价值。方法 TRICKS 应用超短 TR(2.8～4.0 ms)、TE(0.9～1.3 ms)、中心 K 空间3倍于外周 K 空间采集的方法获得高时间分辨率(2～6 s)的 MRA 技术。TRICKS 于增强前首先扫描3D 模片,团注对比剂后连续扫描15～20个序列的3D 图像。结果 30例患者行 TRICKS 检查并获得满意的 CE-MRA 图像。12例椎动脉显示良好(7例正常,1例双侧椎动脉狭窄,4例单侧椎动脉狭窄,其中1例伴同侧颈总动脉分叉部狭窄)。4例双侧肾动脉显示正常,1例移植肾动脉正常,1例移植肾动脉狭窄。2例脑动脉显示正常,1例显示矢状窦血栓,1例显示颅内动静脉畸形。3例肺动脉显示正常,1例显示双侧肺动脉血栓,1例清晰显示左下肺肺段隔离症的供血动脉及引流静脉。1例左下肢纤维脂肪瘤可见动脉分支供血增多。1例显示左侧尺桡动脉人工造瘘口的狭窄。1例显示左前臂海绵状血管瘤。结论TRICKS 能清晰显示全身各部位的血管系统,并能清晰显示各种血管异常。TRICKS 具有方便、高成功率的特点,使其有望成为显示血管异常首选的影像学检查手段。Objective To assess the clinical application of contrast-enhanced MR angiography using three-dimensional （3D） time-resolved imaging of contrast kinetics （CE-MRA 3D-TRICKS）. Methods TRICKS is a high temporal resolution （2-6 s） MR angiographic technique using a short TR （2. 8-4. 0 ms） and TE （0. 9-1.3 ms）, partial echo sampling and the central part of the k-space being updated more frequently than the peripheral part of the k-space. Pre-contrast mask 3D images are first acquired and 15-20 sequential 3D images following bolus injection of Gd-DTPA are then acquired. Results Thirty patients underwent contrast-enhanced MR angiography using TRICKS. Twelve vertebral arteries were well displayed on TRICKS. Seven of them showed normal, bilateral vertebral artery stenosis was shown in 1 case, and unilateral vertebral artery stenosis was shown in 4 wth accompaning ipsilateral carotid artery bifurcation stenosis in one case. Bilateral renal artery showed normal in 4 cases, and the artery in transplanted kidney showed normal in one case and stenosis in another case. The cerebral artery showed normal in 2 cases, sagittal sinus thrombosis was detected in one case and intracranial arteriovenous malformation in one case. Pulmonary artery displayed normal in 3 cases, pulmonary artery thrombosis was seen in one case and pulmonary sequestration＇s abnormal feeding artery and draining vein was revealed in one case. The feeding artery in left lower limb fibrelipoma was showed in one case. The radial-ulnar artery artificial fistula stenosis was seen in one case, and left antebrachium hemangioma was showed in one case. Conclusion TRICKS can clearly delineate the whole body vascular system and can reveal any vascular abnormality. It is convenient and with high successful rate, which make it the first method of choice in displaying vascular abnormality.

关 键 词：磁共振血管造影术 图像增强 血管疾病 

分 类 号：R445.2[医药卫生—影像医学与核医学]