第三代双源CT双低扫描模式在头颈部血管成像中的应用  

Application of the third generation dual source CT in head and neck angiography

作　　者：赵晓静 赵澄[1] 王佩佩[1] 李岩[1] 刘佳宾[1] 卢洁[1] Zhao Xiaojing;Zhao Cheng;Wang Peipei;Li Yan;Liu Jiabin;Lu Jie(Department of Radiology ,Affiliated Xuanwu Hospital of Capital Medical University ,Beijing Key Laboratory of Magnetic Resonance Imaging and Brain In f ormatics ,Beijing 100053 ,China)

机构地区：[1]首都医科大学宣武医院放射科北京磁共振成像脑信息学北京市重点实验室,北京100053

出　　处：《中华老年心脑血管病杂志》2018年第6期568-571,共4页Chinese Journal of Geriatric Heart,Brain and Vessel Diseases

基　　金：北京市医院管理局"登峰"计划(DFL20180802)

摘　　要：目的探讨第三代双源CT双低扫描模式在头颈部血管成像中的应用价值。方法选取2016年2~4月在我院接受头颈部CT血管成像的患者60例,随机分成A组(管电压90kV,造影剂50ml,生理盐水50ml)和B组(管电压80kV,造影剂40ml,生理盐水50ml),每组30例。在管电流处于自动调制下,每组给予不同的管电压和不同剂量的造影剂碘普罗胺(370mgI/ml)。比较2组患者在颈总动脉分叉处的信号噪声比,对比噪声比以及有效剂量和平均碘摄入量。结果 A组图像主观评分为(4.167±0.698)分,B组为(4.500±0.572)分,2组比较无统计学差异(P=0.682)。A组与B组碘摄入量比较差异有统计学意义,B组较A组降低14%[(247.52±29.28)mgI/kg vs(213.02±34.39)mgI/kg,P=0.00]。2组在双侧颈总动脉处的信号噪声比,对比噪声比比较,差异无统计学意义(P>0.05)。B组在平扫和注射造影剂后产生的有效剂量较A组降低了17%和14%。结论第三代双源CT双低扫描模式在头颈部血管成像中,可以获得较好的图像,具有良好的临床应用价值。Objective To study the application of the third generation dual source CT in head and neck angiography.Methods Sixty patients admitted to our hospital for head and neck CT angiography were randomly divided into group A（n=30）and group B（n=30）.The patients in group A were given 50 ml contrast medium and 50 ml normal saline with the tube voltage set at 90 kV while those in group B were given 40 ml contrast medium and 50 ml normal saline with the tube voltage set at 80 kV.The patients in two groups were given a different dose of contrast mediumnaproyan（370 mgI/ml）.The signal noise ratio（SNR）,contast noise ratio（CNR）,effective dose and iodine intake volume at bilateral common carotid artery bifurcation were compared between the two groups.Results No significant difference was found in the image subjective score between groups A and B（4.167±0.698 vs 4.500±0.572,P=0.682）.The mean idione intake volume was 14%lower in group B than in group A（P=0.00）.No significant difference was found in the SNR and CNR at bilateral common carotid artery bifurcation between the two groups.The effective dose was 17%and 14%lower in group B than in group A after plane scanning and contrast medium injection.Conclusion Application of the third generation dual source CT in head and neck angiography can achieve rather good images and is thus of a high value in its clinical application.

关 键 词：体层摄影术 X线计算机 辐射剂量 脑血管造影术 碘 

分 类 号：R743[医药卫生—神经病学与精神病学] R816.1[医药卫生—临床医学]