Low tube voltage and low dose contrast agents combined with artificial intelligence iterative reconstruction in upper limb CT angiography for displaying arteriovenous fistula
10.13929/j.issn.1003-3289.2025.04.008
- VernacularTitle:低管电压及对比剂用量结合深度学习全模型迭代算法用于上肢CT血管成像显示动静脉瘘
- Author:
Beili SHOU
1
;
Jing LI
;
Wenming ZHANG
;
Bin CHEN
;
Yueqiao ZHANG
;
Hongjie HU
Author Information
1. 浙江大学医学院附属邵逸夫医院放射科,浙江 杭州 310016
- Publication Type:Journal Article
- Keywords:
internal arteriovenous fistula;
computed tomography angiography;
artificial intelligence;
radiation dosage;
contrast medium;
prospective studies
- From:
Chinese Journal of Medical Imaging Technology
2025;41(4):543-547
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the value of low tube voltage and low dose contrast agents combined with artificial intelligence iterative reconstruction(AIIR)in upper limb CT angiography(CTA)for displaying arteriovenous fistula(AVF).Methods Totally 65 patients with chronic renal failure and suspected AVF stenosis who underwent upper limb CTA were prospectively enrolled and randomly divided into conventional-dose group(CD group,n=30)and low-dose group(LD group,n=35).In CD group,CTA was acquired using conventional tube voltage(100 kVp)and contrast agents dosage(1.0 ml/kg body mass),and conventional hybrid iterative reconstruction(HIR)was used to reconstruct images(group A),while in LD group,CTA was collected using 80 kVp and contrast agent dosage of 0.6 ml/kg body mass,and images were reconstructed with HIR(group B)and AIIR(group C),respectively.Then subjective and objective assessment of imaging quality were performed,respectively,the results were compared among groups,while the radiation dose and dosage of contrast agents were compared between CD and LD groups.Results No significant difference of subjective score of imaging quality nor confidence for diagnosing AVF stenosis was found between group A and group C(both P＞0.017),and all the above scores were higher than those in group B(all P＜0.017).Signal-to-noise ratio(SNR)and contrast-to-noise ratio(CNR)of subclavian artery,brachial artery and radial artery in group C were all higher than those in groups A and B(all P＜0.017),while no significant difference of SNR nor CNR was found between group A and B(all P＞0.017).The volume CT dose index,dose length product and dosage of contrast agent in LD group were all lower than those in CD group(all P＜0.001).Conclusion Low tube voltage and low dose contrast agents combined with AIIR in upper limb CTA for displaying AVF could reduce radiation dose and contrast agents dosage under the condition of ensuring imaging quality.
