Application of third-generation dual-source CT ultra-low tube voltage combined with advanced analog iterative reconstruction in bronchial artery CTA in patients with hemoptysis
10.19745/j.1003-8868.2025183
- VernacularTitle:第三代双源CT超低管电压联合高级模拟迭代重建在咯血患者支气管动脉CTA检查中的应用
- Author:
Yi JIANG
1
;
Xiao-man ZHOU
1
Author Information
1. 武汉市肺科医院放射科,武汉 430030
- Publication Type:Journal Article
- Keywords:
CT ultra-low tube voltage;
advanced modeled iterative reconstruction;
filtered back projection;
computed tomography angiography;
hemoptysis patient;
bronchial artery;
image quality
- From:
Chinese Medical Equipment Journal
2025;46(10):60-64
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the effects of ultra-low tube voltage of the third-generation dual-source CT combined with advanced modeled iterative reconstruction(ADMIRE)in bronchial artery CTA for hemoptysis patients.Methods Totally 70 hemoptysis patients admitted to some hospital from March to August 2023 had their clinical and imaging data collected retrospectively,and then divided into Group A and B with the numerical table method.In Group A image reconstruction was carried out with 120 kV tube voltage and filtered back projection(FBP)(named as Group A-FBP);In Group B image reconstruction was performed with 70 kV tube voltage respectively combined with FBP,ADMIRE Ⅲ,Ⅳ and Ⅴ(named as Group B-FBP,B-ADMIRE Ⅲ,B-ADMIRE Ⅳ and B-ADMIRE Ⅴ).All the patients were scanned with Siemens third-generation dual-source CT.The groups were compared in terms of radiation dose covering volume CT dose index,dose length product and effective dose,subjective score and objective evaluation.The subjective score agreement between 2 radiologists was evaluated with Kappa test.SPSS 26.0 software was used for statistical analysis.Results The radiation dose parameters of Group B were all lower than those of Group A,and the differences were statistically significant(P<0.001).Group B-FBP and ADMIRE Ⅳ had the lowest and highest subjective scores for bronchial artery images,res-pectively,and the five groups were significantly different in subjective score(P<0.05).The two radiologists had high agree-ment for Kappa values of the subjective scores,with the Kappa values being not lower than 0.75.Group A-FBP showed the lowest vessel CT value,Group B-FBP exhibited the highest image noise and the lowest SNR and CNR,and the five groups differed significantly in the objective evaluation of image quality(P<0.05).Group B-ADMIRE Ⅲ,B-ADMIRE Ⅳ and B-ADMIRE Ⅴ had statistically significant differences with Group A-FBP in objective evaluation of image quality(all P<0.05),with Group B-ADMIRE Ⅴ exhibiting the lowest image noise while highest SNR and CNR.Conclusion Ultra-low tube voltage of the third-generation dual-source CT combined with ADMIRE decreases the radiation dose and ensures image quality when applied to hemoptysis patient CTA,and ADMIRE Ⅳ behaves well in noise reduction and image quality enhancement.[Chinese Medical Equipment Journal,2025,46(10):60-64]
