CT理论与应用研究2026，Vol.35Issue(3)：434-439,6.DOI:10.15953/j.ctta.2024.346
扫描模式对胸主动脉CTA成像质量和辐射剂量的影响
Comparative Study of Different Scanning Modes in Thoracic Aortic Computed Tomography Angiography
摘要
Abstract
Objective:This study aimed to compare the effects of different scanning modes on image quality and radiation dose in thoracic aortic computed tomography angiography(CTA).Methods:The image quality and radiation dose of 30 cases of thoracic aortic CTA(Group 1,control group),30 cases of retrospective CTA diastolic phase(Group 2)and systolic phase(Group 3),and 30 cases of wide-exposure pulse prospective electrocardiogram(ECG)(Group 4)were retrospectively analyzed.The CT value,noise,contrast-to-noise ratio(CNR),signal-to-noise ratio(SNR),and radiation dose(volume CT dose index(CTDIvol))were recorded and measured.The image quality was evaluated subjectively using the four points method.The subjective and objective indicators were analyzed statistically.Results:No differences were observed in the objective indexes of noise,CNR and SNR among the groups.The subjective score of pairwise comparison of Groups 2-4 was significantly higher than that of Group 1,and no difference was observed among Groups 2-4.The CTDIvol values of the non-gated group(Group 1),retrospective gated groups(Groups 2 and 3),and prospective gated group(Group 4)were 13.70(11.87,16.58),12.62(10.03,15.01),and 11.54(8.92,15.56),respectively,without a statistically significant difference.关键词
体层摄影/胸主动脉造影术/心电门控技术/辐射剂量Key words
tomography/thoracic aortic angiography/ECG-gating technology/radiation dose分类
医药卫生引用本文复制引用
张雨虹,马梓轩,胡玲静,吴宁,张永县..扫描模式对胸主动脉CTA成像质量和辐射剂量的影响[J].CT理论与应用研究,2026,35(3):434-439,6.基金项目
北京市教育科学"十四五"规划2024年度一般课题(CDDB24223). （CDDB24223）
