CT理论与应用研究2025，Vol.34Issue(2)：295-302,8.DOI:10.15953/j.ctta.2024.072
头颈部CTA中GSI扫描联合"双低"技术在中老年人群体的应用价值
Analysis of the Value of GSI Scanning Combined with"Double-low"Technology in Head and Neck CTA in Middle-aged and Elderly Individuals
摘要
Abstract
Objective:This study aimed to investigate the value of gemstone spectral imaging(GSI)scanning combined with"double-low"technology in head and neck computed tomography angiography(CTA)in middle-aged and elderly individuals.Materials and Methods:One hundred fifty patients who underwent head and neck CTA from February to December 2023 were retrospectively collected and divided into three groups,comprising 50 patients each,according to different scanning modalities;A,B,and C.Groups A and B underwent conventional spiral scans,with tube voltages of 120 kV and 100 kV,respectively,and tube currents of 300～500 mA were automatically modulated,and the dose and flow rate of the contrast agent were fixed at 55 mL,4.5 mL/s,saline with the same dose and flow rate for flushing and group C energy spectrum scanning,the tube voltage of the flat scanning group was 80 kV,the tube voltage of the enhancement group was 80～140 kV instantaneous switching,and the tube current was a constant 320 mA in all cases,with a personalized contrast agent injection scheme.The subjective evaluation,objective evaluation,and comparison of contrast use dose were performed on the imaging data of all groups.Results:The mean CT values of head and neck vessels in group B were greater than those in groups A and C,with statistically significant differences.At the aortic arch level,the SNR and CNR parameters in group B were better than those in groups A and C,with statistically significant differences.At the level of the remaining blood vessels,the SNR,CNR,and SD parameters of group C were better than those in groups A and B,excluding the common carotid artery level,with statistically significant differences.The radiation dose in group C was 53.9%and 27.6%lower than that in groups A and B,respectively,and the contrast dose was 27.2%lower.Conclusion:In middle-aged and elderly individuals,head and neck CTA with GSI scanning combined with"double-low"technique can effectively reduce radiation and contrast doses and improve image quality.关键词
CT血管造影术/能谱单能量/辐射剂量/对比剂Key words
computed tomography angiography/energy spectrum single energy/radiation dose/contrast agent分类
医药卫生引用本文复制引用
张晓龙,赵英明,张国祥,魏方生,陈呈..头颈部CTA中GSI扫描联合"双低"技术在中老年人群体的应用价值[J].CT理论与应用研究,2025,34(2):295-302,8.基金项目
中国科学技术大学附属第一医院医学人工智能联合基金创新项目(MAI2023C006). （MAI2023C006）
