256层CT对冠状动脉细小分支血管的显示能力探讨  

Investigation of the ability of Brilliance CT 256 coronary angiography in displaying tiny branches of coronary

作　　者：潘为领[1] 王学廷[1] 冯丽[1] 王涛[1] 

机构地区：[1]解放军第148医院放射科,山东淄博255300

出　　处：《医学影像学杂志》2011年第11期1662-1665,共4页Journal of Medical Imaging

摘　　要：目的:探讨256层CT心脏冠脉成像对细小分支血管的显示能力。方法:随机抽取我院2010年12月～2011年3月进行冠状动脉CTA检查患者80例作为研究对象,对比剂使用碘海醇70～80ml,流速5.0～5.5ml/s,采用智能跟踪触发技术,阈值150HU;采用多种图像后处理技术:容积重组(VR)、多平面重组(MPR)、曲面重组(CPR)及最大密度投影(MIP)。结果:80例受检者中,冠状动脉细小分支血管不同程度清晰显示,其中,窦房结支(SNA)显示率为88.8%(起源于右冠状动脉占67.6%、左旋支32.4%)、动脉圆锥支(CAA)98.8%、右室前支(ARVA)70.0%、房室结支(ANA)55.0%、室间隔支(SA)87.5%、左房支(LAA)52.5%,优质图像是冠状动脉细小分支血管得以清晰显示的保证。结论:256层CT冠状动脉CTA明显提高了冠状动脉细小血管分支的显示率,弥补了以往CT设备对细小血管显示的不足,真正展现了冠状动脉的解剖细节。Objective：To investigate the ability of Brilliance CT 256 coronary artery image in displaying tiny branches of coronary.Methods：80 patients were randomly selected with MSCTA from 2010.12 to 2011.3.The contrast medium（Iohexol 350 mg/100ml） was 70~80 ml,the rate was 5.0~5.5 ml/s,with bolus tracking techniques.The threshold was 150 HU,excretory-phase images were transferred to the workstation and performed volume rendering（VR）,multilanar reconstr-uction（MPR）,curved planar reconstruction（CPR） and maximun intensity projection（MIP）.Results：In 80 cases,the tiny branches of coronary were displayed distinctly in different degree,in which branches of sinuatrial node（SNA） were 88.8%,conus arteriosus branch（CAA） 98.8%,anterior right ventricle branch（ARVA） 70.0%,branch of atrioventricular node（ANA） 55.0%,septal branch（SA） 87.5%,and left atrial branch（LAA） 52.5%.The tiny branches of coronary were displayed clearly with high quality images.Conclusion：256 CTCA improved the detectable rate of the tiny branches of coronary,made up the disadevantage of the precious CTCA,and displayed the anatomical characters of coronary clearly.

关 键 词：冠状动脉 细小分支 血管造影 体层摄影术 X线计算机 

分 类 号：R543.3[医药卫生—心血管疾病] R814.42[医药卫生—内科学]