ISSN 1004-4140
CN 11-3017/P
张晓龙, 赵英明, 张国祥, 等. 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(中英文), xxxx, x(x): 1-9. DOI: 10.15953/j.ctta.2024.072.
引用本文: 张晓龙, 赵英明, 张国祥, 等. 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(中英文), xxxx, x(x): 1-9. DOI: 10.15953/j.ctta.2024.072.
ZHANG X L, ZHAO Y M, ZHANG G X, et al. Analysis of the Value of GSI Scanning Combined with “Double-low” Technology in Head and Neck CTA in Middle-aged and Elderly Individuals[J]. CT Theory and Applications, xxxx, x(x): 1-9. DOI: 10.15953/j.ctta.2024.072. (in Chinese).
Citation: ZHANG X L, ZHAO Y M, ZHANG G X, et al. Analysis of the Value of GSI Scanning Combined with “Double-low” Technology in Head and Neck CTA in Middle-aged and Elderly Individuals[J]. CT Theory and Applications, xxxx, x(x): 1-9. DOI: 10.15953/j.ctta.2024.072. (in Chinese).

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: 目的:探讨头颈部CTA中GSI扫描联合“双低”技术在中老年人群体的应用价值。材料和方法:回顾性收集2023年2月至12月行头颈CTA检查患者的影像资料150例,根据不同的扫描方式分为A、B、C三组,各50例。A组和B组均为常规螺旋扫描,管电压分别为120 kV和100 kV,均为管电流自动调制300~500 mA,对比剂用量及流速均为固定55 mL、4.5 mL/s,盐水以与对比剂相同用量及流速进行注射。C组能谱扫描,平扫组管电压为80 kV,增强组管电压为80~140 kV瞬时切换,管电流均为恒定的320 mA,采用个性化对比剂注射方案。对3组影像资料进行主观评价、客观评价及比较对比剂用量、平均注射速率。结果:B组头颈部各血管平均CT值大于A组和C组,差异具有统计学意义(P<0.05);主动脉弓层面,B组SNR及CNR参数优于A组和C组,差异具有统计学意义(P<0.05);其余血管层面C组SNR、CNR、SD参数均优于A组和B组,除颈总动脉层面,差异具有统计学意义(P<0.05);C组DLP相较于A组和B组分别降低53.9%和27.6%,对比剂用量降低27.2%。C组对比剂平均注射速率为(3.9±0.5)mL/s低于A给和B组固定流速4.5 mL/s。结论:在中老年人群体中,以GSI扫描模式联合“双低”技术行头颈CTA可有效降低辐射剂量、减少对比剂用量及改善图像质量。

     

    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 120kV and 100kV, respectively, and tube currents of 300–500mA were automatically modulated, and the dose and flow rate of the contrast agent were fixed at 55mL, 4.5mL/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 80kV, the tube voltage of the enhancement group was 80–140kV instantaneous switching, and the tube current was a constant 320mA 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 (P<0.05). 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 (P<0.05). 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 (P<0.05). 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.

     

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