分子影像学杂志2026，Vol.49Issue(8)：1037-1043,7.DOI:10.12122/j.issn.1674-4500.2026.08.08
前置混合双流团注追踪法在双源CT肺动脉血管造影中的可行性分析
Feasibility analysis of pre-dual-flow injection bolus tracking protocol for dual-source CT pulmonary angiography
摘要
Abstract
Objective To investigate the feasibility of pre-dual-flow injection bolus tracking protocol with free-breathing for dual-source CT spectral pulmonary angiography(CTPA)and assess its image quality.Methods A retrospective analysis was conducted on 100 patients who underwent CTPA at Nanfang Hospital of Southern Medical University from March to December 2025.The patients were divided into pre-dual-flow injection bolus tracking protocol(group A,n=50)or test bolus protocol(group B,n=50).The CT values,signal-to-noise ratio(SNR),contrast-to-noise ratio(CNR)and radiation dose were compared between the two groups in objective analysis.The vascular filling,arteriovenous separation,beam hardening artifact of SVC and respiratory artefact were scored in subjective analysis.Results Compared with Group B,the CT values were significantly higher in the right pulmonary basal artery trunk,left lower artery,right posterior basal(A10),and left posterior basal(A10)in group A,while the CT value of the superior vena cava(SVC)was significantly lower in group A(P<0.05).The SNR and CNR were significantly higher in the left lower artery,right posterior basal(A10)and left posterior basal(A10)in group A(P<0.05).The beam hardening artefact of SVC was significantly lower in group A(P<0.05).Conclusion The pre-dual-flow injection bolus tracking protocol with free-breathing and combined with lower volume of contrast medium has significant advantages in reducing beam hardening artefact of SVC and ensuring image quality for dual-source CTPA.关键词
前置混合双流团注追踪法/小剂量团注测试法/双源CT能谱成像方式肺动脉血管造影/自由呼吸Key words
pre-dual-flow injection bolus tracking/test bolus/dual-source CT spectral pulmonary angiography/free-breathing引用本文复制引用
王君玲,蹇明爵,周建伟,胡罢生,余泽君,陈斌..前置混合双流团注追踪法在双源CT肺动脉血管造影中的可行性分析[J].分子影像学杂志,2026,49(8):1037-1043,7.基金项目
广东省自然科学基金面上项目(2026A1515010503) （2026A1515010503）
