摘要
目的探讨双源CT头颈心一站式扫描对动脉粥样硬化(AS)患者的应用价值。方法将120例AS患者随机分为2组,每组60例。对A组行头颈心一站式扫描,B组分别行常规冠状动脉CTA及头颈部血管CTA扫描。对2组图像质量进行主观及客观评价;主观评分采用3分法,客观评价指标包括左冠状动脉主干、右冠状动脉中段、颈总动脉近分叉处、颈内动脉C1段、大脑中动脉M1段血管的平均SNR及其相对于脊柱旁肌肉的CNR。记录2组CTA扫描长度、扫描时间、剂量长度乘积(DLP)和有效剂量(ED),并进行统计学分析。结果2组图像质量评分差异无统计学意义(t=0.596,P=0.283),SNR及CNR差异亦无统计学意义(t=0.828、0.761,P=0.104、0.089)。2组间CTA扫描长度差异无统计学意义(t=1.351,P=0.621),但A组较B组扫描时间更短[(1.30±0.12)s vs(4.08±0.69)s,t=-2.831,P=0.006],DLP[(146.03±13.05)mGy·cm vs(1935.04±134.12)mGy·cm,t=-6.743,P<0.01]及ED[(0.88±0.32)mSv vs(9.62±1.64)mSv,t=-4.056,P<0.01]更低。结论对AS患者,双源CT头颈心一站式扫描技术能获得满意的冠状动脉、头颈动脉图像,同时显著降低辐射剂量。
Objective To investigate the application value of one-step scanning of head,neck and heart with dual-source CT in atherosclerosis(AS)patients.Methods A total of 120 AS patients were randomly divided into group A and B(each n=60).One-step scanning was performed in group A,while conventional coronary CTA and CTA of head and neck vessels were performed in group B.Subjective and objective evaluations of image quality were carried out.The 3-point method was used for subjective scoring.Objective evaluation indicators included the mean SNR of left coronary artery trunk,right coronary artery,common carotid artery near the bifurcation,internal carotid artery C1 segment and M1 segment of the middle artery,as well as CNR relative to the paraspinal muscles.The scanning length of CTA,time of scanning,dose length product(DLP)and effective dose(ED)were recorded to evaluate the radiation dose,and then statistical analysis was done.Results There was no significant difference of image quality scores(t=0.596,P=0.283),nor of SNR and CNR(t=0.828,0.761,P=0.104,0.089)between the two groups.Although no significant difference of scanning length of CTA was found(t=1.351,P=0.621),the time of scanning in group A was shorter than that in group B([1.30±0.12]s vs[4.08±0.69]s,t=-2.831,P=0.006),and DLP([146.03±13.05]mGy·cm vs[1935.04±134.12]mGy·cm,t=-6.743,P<0.01)and ED([0.88±0.32])mSv vs[9.62±1.64]mSv,t=-4.056,P<0.01)in group A were lower than those in group B.Conclusion For AS patients,one-step scanning of head,neck and heart with dual-source CT can provide satisfactory imaging quality of coronary artery and arteries of head and neck,meanwhile significantly reduce the radiation dosage.
作者
王涛
唐滢
张小勇
周鹏
王荣品
WANG Tao;TANG Ying;ZHANG Xiaoyong;ZHOU Peng;WANG Rongpin(Department of Radiology,Guizhou Provincial People's Hospital,Guiyang550002,China;Key Laboratory of Intelligent Medical Imaging Analysis and Accurate Diagnosis of Guizhou Province,Guiyang550025,China;Department of Radiology,Dejiang County People's Hospital of Guizhou Province,Dejiang565200,China)
出处
《中国介入影像与治疗学》
北大核心
2019年第11期672-675,共4页
Chinese Journal of Interventional Imaging and Therapy
基金
贵州省科技平台及人才团队建设计划项目[黔科合平台人才(2017)5724]
