Application of Auto-prescription combined with low-dose contrast and iterative reconstruction algorithm in the CT angiography of thoracodorsal artery
10.3969/j.issn.1002-1671.2025.05.032
- VernacularTitle:自动预置技术结合低剂量对比剂及迭代重建算法在胸背动脉CT血管成像中的应用
- Author:
Jian HE
1
;
Yijun LIU
1
;
Wei WEI
1
;
Mengting HU
1
;
Jingyi ZHANG
1
;
Qiye CHENG
1
;
Deshuo DONG
1
;
Zhiming MA
1
;
Changyu DU
1
Author Information
1. 大连医科大学附属第一医院放射科,辽宁 大连 116011
- Publication Type:Journal Article
- Keywords:
thoracodorsal artery;
computed tomography angi-ography;
Auto-prescription;
adaptive statistical iterative recon-struction-Veo algorithm
- From:
Journal of Practical Radiology
2025;41(5):861-865
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the application value of Auto-prescription combined with low-dose contrast and adaptive statisti-cal iterative reconstruction-Veo(ASIR-V)algorithm in the computed tomography angiography(CTA)of thoracodorsal artery(TDA).Methods A total of 100 patients who underwent TDA CTA examination were prospectively selected.A tube voltage of 120 kVp and contrast agent of 1.5 mL/kg were used for group A(50 cases),and images were reconstructed with 40％ post-set ASIR-V.The Auto-prescription for tube voltage and contrast agent of 1.2 mL/kg were used for group B(50 cases),while images were reconstruc-ted with 40％,60％,and 80％ post-set ASIR-V,labeled as subgroups B1 to B3.The objective and subjective evaluation results of the images were compared between and within groups.Results Group A had an effective dose(ED)of 2.98(2.65,4.03)mSv,while group B had an ED of 1.92(1.44,3.33)mSv.The iodine intake in group B was lower than that in group A,and the CT value of the axillary artery in group B was significantly higher than that in group A(P＜0.001).With the increased of ASIR-V level in group B,the signal-to-noise ratio(SNR)and contrast-to-noise ratio(CNR)of the images gradually increased(P＜0.05).In terms of subjec-tive scores on axial images,both subgroups B2 and B3 were superior to group A(P＜0.001);with the increased of ASIR-V level in group B,subjective scores of axial images increased first and then decreased,among which subjective score of subgroup B2 was the highest and the differences were statistically significant(P＜0.001).In terms of subjective scores on three-dimensional image quality,subgroups B1 to B3 were superior to group A(P＜0.001).Conclusion The use of Auto-prescription combined with low-dose con-trast and 60％ ASIR-V can significantly optimize the display of TDA,and reduce the radiation dose and contrast agent dose to a certain extent.
