颅内动脉支架的旋转DSA双容积显示方法及效果分析  

Application of rotational DSA dual volume technology in the displaying of intracranial artery stent and its effective analysis

作　　者：沈正林[1] 胡克琦[2] 闻宏斌 李秀荣[2] 常丽英[2] SHEN Zhenglin HU Keqi WEN Hongbin LI Xiurong CHANG Liying(Department of Interventional Radiology, Xiangyang Central Hospital, Xiangyang 441021, China)

机构地区：[1]湖北文理学院附属襄阳医院襄阳市中心医院介入室,湖北襄阳441021 [2]湖北文理学院附属襄阳医院襄阳市中心医院神经科,湖北襄阳441021

出　　处：《实用放射学杂志》2016年第10期1590-1593,1613,共5页Journal of Practical Radiology

基　　金：湖北省卫生和计划生育委员会课题（WJ2015MB265）。

摘　　要：目的：探讨颅内动脉支架的旋转 DSA 双容积显示技术的实现方法及其应用效果。方法先采用“支架不透明”单容积显示技术对7例单纯颅内动脉支架术和12例支架辅助动脉瘤栓塞术中释放的5种支架进行显示。再分别采用“血管透明”和“血管不透明”单容积显示技术对相应段血管进行显示。最后将支架的单容积影像与血管的单容积影像进行融合成像,形成“支架不透明＋血管透明”双容积图像和“支架不透明＋血管不透明”双容积图像。对比上述2种双容积成像效果,评价各自的显示特点及影响因素。结果（1）在“支架不透明”单容积显示模式下,单纯植入支架的7例中,2枚 Pipeline 支架和3枚 Apollo 支架的显示效果属于1级,2枚 Enterprise 支架显示效果属于2级；在支架辅助弹簧圈栓塞的12例中,在没有受到伪影影响的支架节段,2枚 LEVIS支架的显示等级属于1级,5枚 Enterprise 支架和2枚 Solitaire AB 支架的显示等级属于2级；在受到弹簧圈伪影影响和骨质干扰的节段,显示效果明显下降,有3枚 Enterprise 支架全段都无法辨认。（2）在“血管不透明”单容积显示模式下,19例支架段血管完成不透明显示,血管表面结构显示十分清晰,但其表面下的结构被完全遮盖。在“血管透明”单容积显示模式下,19例支架段血管的表面结构在切线位上显示清晰,管腔呈透明状态。（3）采用“支架不透明＋血管透明”双容积成像时,16例支架在血管中的起止位置、支架张开贴壁情况均都得以清晰显示。采用“支架不透明＋血管不透明”双容积成像时,除3例运用球扩式 Apollo 支架的病例能显示支架和血管间的全面关系外,其余13例支架和血管的关系不能全面显示。结论在单容积显示技术能良好表现支架网的情况下,“支架不透明＋血管透明”双容积组合显示技术能较好地表现血管内的支架情Objective To investigate the implementation and application of rotational DSA dual volume technology in displaying the intracranial artery stent.Methods Firstly,the “stent opacity”single volume technology was used to display 5 types of stent which were released in 7 cases of pure intracranial artery stenting and 12 cases of stent-assisted aneurysm embolization.Then we applied “vessel translucent”and “vessel opacity”single volume technology to display corresponding vessel segments.Finally,by coalescing the single volume imaging of stent and vessel,the “vessel opacity ＋ stent opacity”dual volume image and “vessel translucent＋ stent opacity”dual volume image were performed.We compared the effects of two kinds of dual volume imaging and assessed the imaging characteristics and influencing factors of each method.Results （1）On the “stent opacity”single volume display mode,in 7 cases of pure intracranial artery stenting,the display effect of two Pipeline stents and three Apollo stents belongs to level 1,the display effect of two Enterprise stents belongs to level 2;In 12 cases of stent-assisted aneurysm embolization,in the stent segments which weren’t influenced by artifacts,the display effect of two LEVIS stents belongs to level 1,the display effects of 5 Enterprise stents and 2 Solitaire AB stents belongs to level 2;While in the stent segments which were influenced by the artifact of spring coil and bone,the display effect significantly reduced, three pieces of Enterprise stents were even unable to identify.（2）On the “vessel opacity”single volume display mode,1 9 cases of vessel segment at the stent completed opacity display.The surface structure of vessel was very clear,but the structure under the surface was completely being covered.On the “vessel translucent”single volume display mode,the surface structure of 19 cases of vessel segment at the stent displayed clear at the tangential position.The vessel lumen also presented transparent state.（3）On the “stent opacity

关 键 词：颅内动脉 支架 数字减影血管造影 旋转采集 

分 类 号：R816.1[医药卫生—放射医学] R815[医药卫生—临床医学]