分子影像学杂志2025，Vol.48Issue(9)：1109-1114,6.DOI:10.12122/j.issn.1674-4500.2025.09.08
双流注射技术联合70 kV低剂量扫描在头颈部血管成像中的应用
The application of dual-flow injection technology combined with 70 kV low-dose scanning in head and neck CT angiography
摘要
Abstract
Objective To explore the feasibility of applying dual-flow injection technique combined with 70 kV tube voltage scanning in head and neck computed tomography angiography(CTA).Methods A total of 160 patients who underwent head and neck CTA examinations at the Medical Imaging Center of Taihe Hospital in Shiyan City were prospectively collected from July to November 2024 and randomly categorized into three groups(A,B,C):group A(n=60)underwent 70 kV tube voltage scanning with dual-flow injection;group B(n=40)underwent 100 kV tube voltage scanning and dual-flow injection;group C(n=60)underwent 100 kV tube voltage scanning with conventional injection.For each group,the CT values,background noise(SD),contrast-to-noise ratio(CNR)and signal-to-noise ratio(SNR)of the aortic arch,common carotid artery,internal carotid artery,and D2 segment of middle cerebral artery were recorded.Additionally,the computed tomography dose index(CTDI)and dose length product(DLP)values of each patient were recorded;the subjective evaluation was performed by 2 senior physicians using double-blind scoring of all VR images.All data were statistically analyzed.Results group A showed significantly higher CT values in the aortic arch compared to group C(P<0.05),while no significant differences were observed in the remaining vessel segments between group A and C(P>0.05).In group A,the CT values of the aortic arch,bilateral common carotid arteries,bilateral internal carotid arteries,and bilateral middle cerebral arteries were all above 300 HU,meeting the diagnostic requirements.At the level of the bifurcation of the aortic arch,right common carotid artery,and the beginning of the right middle cerebral artery,the SNR and CNR values of group A were significantly lower than those of group C(P<0.05),with no significant differences compared to group B(P>0.05).The CTDI,DLP,and Effective dose(ED)values of group A were significantly lower than those of groups B and C,and the differences were statistically significant(P<0.05).Specifically,compared to group C,group A showed a 77.41%reduction in CTDI,a 77.37%reduction in DLP,and a 77.78%reduction in ED.Additionally,the iodine contrast dose in group A was reduced by 40%compared to group C.Conclusion In head and neck CTA,the dual-flow injection technique combined with 70 kV low-tube-voltage scanning method can significantly reduce the radiation dose and pure iodine contrast agent usage without affecting the image quality and meeting the diagnostic requirements.The method is feasible in clinical examination.关键词
脑血管造影术/双流注射技术/低管电压/图像质量/辐射剂量Key words
cerebral angiography/biphasic injection technique/low tube voltage/image quality/radiation dose引用本文复制引用
王雨竹,陈文,刘超,王赛,陈恒昌,王冠,杨波..双流注射技术联合70 kV低剂量扫描在头颈部血管成像中的应用[J].分子影像学杂志,2025,48(9):1109-1114,6.基金项目
湖北省自然科学基金青年项目(2022CFB853) （2022CFB853）
