100 kVp低管电压联合ASIR-V在脊髓Adamkiewicz动脉成像中的应用价值  

Application value of 100 kVp low tube voltage combined with ASIR-V in Adamkiewicz artery imaging of spinal cord

作　　者：邓建涛 马婷 严高武 严静 吴思颐 范小萍[1] 李勇 DENG Jiantao;MA Ting;YAN Gaowu;YAN Jing;WU Siyi;FAN Xiaoping;LI Yong(Department of Radiology,Suining Central Hospital,Suining,Sichuan Province 629000,China)

机构地区：[1]遂宁市中心医院放射科,四川遂宁629000

出　　处：《实用放射学杂志》2024年第3期464-467,498,共5页Journal of Practical Radiology

基　　金：四川省卫生健康委员会科研课题(19PJ284)。

摘　　要：目的探讨100 kVp低管电压联合自适应统计迭代重建-V(ASIR-V)对Adamkiewicz动脉(AKA)成像的显示、图像质量及辐射剂量的影响.方法90例行主动脉CT血管成像(CTA)检查的患者按随机数字表法分为2组,A组管电压100 kVp,ASIR-V 80%重建;B组管电压120 kVp,自适应统计迭代重建(ASIR)40%重建.在T12层面测量降主动脉的CT值及标准差(SD)值,并测量同层面脊髓的CT值及SD值,计算AKA的信噪比(SNR)及对比噪声比(CNR).根据AKA与肋间动脉或腰动脉的连续性,由2名医师采用双盲法以5分法对AKA的可视化进行评估,并比较A、B 2组的辐射剂量.结果与B组相比,A组主动脉的CT值显著增高约22.83%(P<0.001);A组AKA的背景噪声显著低于B组,SNR及CNR显著高于B组(P<0.001).A组AKA的可视化评分高于B组(P<0.05).A组有效剂量(ED)较B组显著降低约41.28%(P<0.001).结论100 kVp联合ASIR-V技术行脊髓AKA成像,可获得较好的图像质量,提高了AKA显示的敏感性,并降低了辐射剂量.Objective To investigate the effect of 100 kVp low tube voltage combined with adaptive statistical iterative reconstruc-tion-Veo(ASIR-V)on the imaging display,image quality and radiation dose of Adamkiewicz artery(AKA).Methods Ninety patients with computed tomography angiography(CTA)of aorta were randomly divided into two groups.In group A,the tube voltage was 100 kVp,and ASIR-V was 80%reconstructed.The tube voltage in group B was 120 kVp,and adaptive statistical iterative recon-struction(ASIR)was 40%reconstructed.The CT value and the standard deviation(SD)value of descending aorta were measured at the 12th thoracic vertebra level,and the CT value and the SD value of the spinal cord were measured at the same level to calculate the signal-to-noise ratio(SNR)and contrast-to-noise ratio(CNR)of AKA.According to the continuity between AKA and intercostal artery or lumbar artery,the visualization of AKA was evaluated by two doctors with a double-blinded method and a five-point method,and the radiation doses of group A and group B were compared.Results Compared with group B,the CT value of aorta in group A was sig-nificantly increased by about 22.83%(P<0.001).The background noise of AKA in group A was significantly lower than that in group B(P<0.001),and the SNR and CNR were significantly higher than those in group B(P<0.001).The visualization score of AKA in group A was higher than that in group B(P<0.05).The effective dose(ED)in group A was significantly lower than that in group B by about 41.28%(P<0.001).Conclusion 100 kVp combined with ASIR-V technique for spinal cord AKA imaging can obtain better image quality,improve the sensitivity of AKA display and reduce the radiation dose.

关 键 词：低管电压 自适应统计迭代重建-V ADAMKIEWICZ动脉 计算机体层成像 血管造影术 

分 类 号：R814.42[医药卫生—影像医学与核医学] R816.2[医药卫生—放射医学]