Riolan动脉弓的MSCT血管成像表现  

Imaging features of Riolan arch on MSCT angiography

作　　者：逄利博[1] 廖伟[2] 高玉颖[2] 杨立[3] 

机构地区：[1]中国医科大学本溪市中心医院放射科,辽宁本溪117000 [2]中国医科大学附属盛京医院放射科,辽宁沈阳110004 [3]中国人民解放军总医院放射科,北京100853

出　　处：《中国介入影像与治疗学》2012年第4期274-277,共4页Chinese Journal of Interventional Imaging and Therapy

摘　　要：目的探讨MSCT血管成像(MSCTA)Riolan动脉弓的影像表现。方法收集6例Riolan动脉弓病变患者,3例男性患者为高血压动脉粥样硬化性疾病,3例女性患者均为多发性大动脉炎。采用16层(4例)、64层(2层)螺旋CT扫描行腹部CTA检查,对病变血管行VR、MIP和MPR重建。结果 6例Riolan动脉弓血管直径为3.5～10.0mm,平均(6.7±0.4)mm。3例腹主动脉粥样硬化性病变中,肠系膜上动脉(SMA)近端闭塞2例,远端与肠系膜下动脉(IMA)形成Riolan动脉弓,其中1例伴有腹主动脉瘤,同时SMA、IMA与腹腔动脉干形成动脉吻合弓;IMA近端闭塞1例,远端与SMA形成Riolan动脉弓。3例多发大动脉炎中,2例SMA狭窄,SMA与IMA间形成Riolan动脉弓,1例SMA、IMA同时与腹腔动脉干形成动脉吻合弓;1例IMA近端狭窄,IMA与SMA间形成Riolan动脉弓。结论 MSCTA可以显示SMA与IMA间Riolan动脉弓结构,其特征性影像表现是SMA与IMA间的纡曲扩张的血管弓。出现Riolan动脉弓提示SMA或IMA管腔闭塞或狭窄。Objective To investigate imaging manifestations of Riolan arch on MSCT angiography（MSCTA）.Methods Six patients with Riolan arch were collected.Three males had hypertension atherosclerosis,while 3females had suffered from Takayasu＇s arteritis.MSCTA was performed（with 16-slice CT scanner in 4cases and 64-slice scanner in 2）,and abdominal pathological changes of blood vessel were observed with VR,MIP and MPR.Results The calibers of Riolan arch of the 6cases were 3.5 — 10.0 mm,with average of（6.7±0.4） mm.Proximal occlusion of superior mesenteric artery（SMA） was found in 2cases of abdominal aorta atherosclerotic lesions,while Riolan arch was detected between the distal part of SMA with inferior mesenteric artery（IMA）.In one case of abdominal aorta atherosclerotic lesions accompanied by abdominal aortic aneurysm,Riolan arch and inosculation arch were found between SMA and IMA with celiac trunk.Proximal occlusion of IMA was noticed in one case,with IMA distal part formed Riolan arch connecting SMA.Among 3cases with Takayasu arteritis,stenosis of SMA was showed in 2cases,Riolan arch formed between SMA and IMA,while SMA,IMA formed inosculation arch with celiac trunk in 1case.Conclusion MSCTA could show the structural information of Riolan arch between SMA and IMA.Circuitous and dilated arterial arch between SMA and IMA were the characteristics of Riolan arch.The appearance of Riolan arch prompted occlusions or stenosis of SMA or IMA,suggesting the compensatory alteration of intestinal canal blood supply.

关 键 词：Riolan动脉弓 体层摄影术 螺旋计算机 血管造影术 

分 类 号：R816.2[医药卫生—放射医学]