64层CT下肢动脉成像技术及后处理策略  

Imaging technique and postprocessing of lower extremity arteries using 64-slice CT

作　　者：杨明[1] 滕皋军[1] 刘斌[1] 吴旻[1] 靳激扬[1] 邓钢[1] 

机构地区：[1]东南大学附属中大医院放射科,南京210009

出　　处：《介入放射学杂志》2008年第5期353-356,共4页Journal of Interventional Radiology

基　　金：东南大学优秀博士学位论文基金(YBJJ0729)

摘　　要：目的研究64层螺旋CT下肢动脉成像技术及后处理策略。方法42例患者进行64层螺旋CT下肢动脉检查,其中31例患者同时进行了DSA检查。观察CT增强后2次扫描下肢动脉远段的显示情况,并对比最大密度投影(MIP)及容积重建(VR)对下肢动脉分支的显示差异。结果第1次增强扫描时18支足背动脉不显影,15支足底动脉不显影;增强后延迟扫描14支足背动脉不显影,11支足底动脉不显影;第2次结果与DSA一致。MIP重建观察到的血管分支多于VR,两者之间有明显统计学差异(P=0,t=7.445)。结论下肢CT动脉成像中需注意追加第2次延迟扫描。MIP较VR能显示血管的更多分支,两者在观察图像中各有所长,需合理应用。Objective To study imaging technique and postprocessing of lower extremity arteries using 64-slice spiral CT. Methods 42 patients being doubt of lower limb artery diseases were scanned by 64-slice spiral CT. CTA and DSA were all performed in 31 patients. The distal lower extremity arteries of the two kinds enhanced scans（MIP and VR reconstructions）were observed for showing the different abilities in demonstrating the number of arteries. Results 18 arteria dorsalis pedis and 15 arteria plantaris could not be shown on the first scan after enhancement. 14 arteria dorsalis pedis and 11 arteria plantaris were not shown on the secondary delayed scans. The result of the secondary enhancement were concordant with those of DSA. More vascular branches could be demonstrated in MIP reconstruction than those in VR reconstruction. Significantly statistical difference was seen between the two （P = 0,t = 7.445）. Conclusion The secondary delayed enhancement should be used in lower extremity arterial CT angiography, together with MIP reconstruction could show more vascular branches than those in VR reconstruction, but they ought to be performed properly for correlative advantages.

关 键 词：CT血管造影 多层CT 下肢 

分 类 号：R816.2[医药卫生—放射医学]