320排容积CT冠脉成像对比剂剂量的优化  

Contrast agent dose optimisation in coronary artery imaging using 320-slice

作　　者：张建生[1] 孟晓春[1] 郭宁[1] 徐川[1] 

机构地区：[1]广州市中山大学附属第三医院放射科,广东广州510630

出　　处：《中国医药导报》2010年第32期70-71,共2页China Medical Herald

摘　　要：目的:探讨相同碘浓度、相同对比剂注射流率,不同对比剂剂量在320排容积CT冠脉成像的应用效果。方法:应用320排容积CT对临床拟诊断为冠心病的100病例,进行宽探测器平台下动态容积扫描,将患者分为常规组(A组)和低剂量组(L组),每组50例,按公斤体重A组采用1.1 ml/kg注射,L组采用0.8 ml/kg注射,然后对A组和L组图像质量进行评估。结果:A组与L组患者各段血管的增强程度没有显著性差异,都能达到诊断标准。结论:采用0.8 ml/kg低对比剂剂量注射,能满足320排容积CT冠脉成像,具有明显的优越性。Objective： To assess the effect of different volumes of contrast agent（the same concentration of iodine and injection speed） on image quality for coronary computed tomography angiography（CCTA） by using 320 slice volume CT.Methods： 100 patients with clinically suspected coronary disease were performed CCTA using 320 slice CT in dynamic volume scanning mode.The patients were divided into two groups,receiving intravenous injection of 1.1 ml/kg of contrast agent（group A,n=50） or 0.8 ml/kg of contrast agent（group L,n=50）.And then image quality was evaluated.Results： There was no significant difference in the mean enhancement values of each segment of vessels between group A and group L.Diagnostic image quality could be achieved in both groups.Conclusion： The use of low-volume（0.8 ml/kg） injections of contrast agent is feasible for CCTA using 320 slice volume CT,which is with obvious superiority.

关 键 词：320排容积CT 冠状动脉 注射流率 对比剂剂量 

分 类 号：R814.43[医药卫生—影像医学与核医学]