"三低"技术联合人工智能迭代重建算法在头颈部CT血管成像中的应用价值  

The application value of the“triple-low”technique combined with the artificial intelligence iterative reconstruction in craniocervical CT angiography

作　　者：童彦颢 陈徐倩 季敏 严诚 TONG Yanhao;CHEN Xuqian;JI Min;YAN Cheng(Department of Radiology,Zhongshan Hospital,Fudan University,Shanghai 200032,China;Shanghai United Imaging Healthcare Co.,Ltd.,Shanghai 200032,China)

机构地区：[1]复旦大学附属中山医院放射诊断科,上海200032 [2]上海联影医疗科技股份有限公司,上海200032

出　　处：《实用放射学杂志》2025年第3期501-505,共5页Journal of Practical Radiology

摘　　要：目的 探讨"三低"(低辐射剂量、低对比剂用量及低对比剂流速)技术联合人工智能迭代重建算法(AIIR)在头颈部CT血管成像(CTA)中的应用价值.方法 前瞻性纳入70例行头颈部CTA检查患者,随机分为A、B 2组,每组各35例.A组为"三低"技术组(80 kV,0.4 mL/kg,2.5 mL/s);B组为对照组(120 kV,0.7 mL/kg,5 mL/s).A组分别使用AIIR和混合迭代重建算法(HIR)重建图像,得到A1组和A2组;B组使用HIR重建图像.测量分析3组CTA图像主动脉弓、颈总动脉分叉处、颈内动脉C3段和大脑中动脉 M1段层面的CT值、标准差(SD)值、信噪比(SNR)和对比噪声比(CNR).同时比较2组的辐射剂量和对比剂用量.由2名放射科医师以5分法对3组CTA的图像进行双盲评价,并对2人评分的一致性采用Kappa分析.结果 A组辐射剂量和对比剂用量分别较B组降低了约68.21%和44.44%,差异有统计学意义(P<0.05).A1组SNR、CNR均高于B组和A2组,差异有统计学意义(P<0.05).A1组主观评分Kappa值为0.688,B组主观评分Kappa值为0.499,A2组主观评分Kappa值为0.571,一致性较好,差异有统计学意义(P<0.05).结论 "三低"技术联合AIIR可以大幅降低头颈部CTA检查的辐射剂量和对比剂用量,并且图像质量优于常规扫描使用HIR重建的图像.Objective To explore the application value of the“triple-low”(low radiation dose,low contrast medium and low contrast flow rate)technique combined with the artificial intelligence iterative reconstruction(AIIR)in craniocervical computed tomography angiography(CTA).Methods Seventy patients undergoing head and neck CTA were prospectively enrolled and randomized into group A and group B,with 35 patients in each group.Group A was the“triple-low”technique group(80 kV,0.4 mL/kg,2.5 mL/s);group B was the control group(120 kV,0.7 mL/kg,5 mL/s).Group A images used AIIR and hybrid iterative reconstruction(HIR),and obtained group A1 and group A2;group B images used HIR.CT values,standard deviation(SD)values,signal-to-noise ratio(SNR),and contrast-to-noise ratio(CNR)at the level of the aortic arch,common carotid artery bifurcation,internal carotid artery segment C3 and middle cerebral artery segment M1 in the three groups of CTA images were measured and analyzed.The radiation dose and contrast medium were also compared.Two radiologists performed the double-blind evaluation of the image quality of different CTA segments in the three groups using a 5-point scale.Kappa analysis was used to analyze the compatibility of two people’s scores.Results The radiation dose and contrast medium of group A were reduced by about 68.21%and 44.44%compared with those of group B,respectively.The differences were statistically significant(P<0.05).The SNR,CNR of group A1 were higher than those of group B and group A2,and the differences were statistically significant(P<0.05).The Kappa value of subjective score in group A1 was 0.688;the Kappa value of subjective score in group B was 0.499;the Kappa value of subjective score in group A2 was 0.571,which was in good agreement and statistically significant(P<0.05).Conclusion The“triple-low”technique combined with the AIIR in craniocervical CTA can significantly reduce the radiation dose and contrast medium.And its image quality is better than conventional scans which are reconstructed wi

关 键 词：计算机体层成像 血管造影术 人工智能 辐射剂量 

分 类 号：R814.42[医药卫生—影像医学与核医学] R814.43[医药卫生—放射医学] TP18[医药卫生—临床医学]