ECG-less technology and deep learning image reconstruction algorithm for coronary CT angiography
10.13929/j.issn.1003-3289.2025.09.026
- VernacularTitle:ECG-less技术与深度学习图像重建算法用于冠状动脉CT血管成像
- Author:
Yuefen BIAN
1
;
Zhengyu ZHANG
1
;
Yue TENG
1
;
Jianyu HOU
1
;
Bangjun GUO
1
Author Information
1. 苏州大学附属第一医院放射科,江苏苏州 215000
- Publication Type:Journal Article
- Keywords:
coronary disease;
coronary angiography;
tomography,X-ray computed;
electrocardiography;
deep learning
- From:
Chinese Journal of Medical Imaging Technology
2025;41(9):1577-1581
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the value of ECG-less technology and deep learning image reconstruction(DLIR)algorithm for coronary CT angiography(CCTA).Methods Seventy-one patients with suspected coronary artery disease(CAD)were prospectively enrolled and randomly divided into group A(n=35,underwent CCTA using ECG-less technology)and B(n=36,underwent CCTA using physical electrocardiographic gating).CCTA images of group A were reconstructed using filtered back projection(FBP),adaptive statistical iterative reconstruction V(ASiR-V)(50％blending)and high-strength DLIR(DLIR-H),respectively,while those of group B were reconstructed using conventional ASiR-V(50％blending).The radiatio n doses and examination durations of CCTA were compared between groups.Then subjective and objective evaluation of imaging quality were compared between groups and within group A among 3 reconstruction algorithms.Results No significant difference of radiation dose of CCTA was found between groups(P＞0.05).The examination duration in group A was reduced by approximately 29.37％compared to group B(P＜0.05).No significant difference of subjective image quality scores nor objective evaluation of ASiR-V reconstructed CCTA was detected between groups(all P＞0.05).In group A,compared to FBP algorithm,subjective image quality scores of DLIR-H and ASiR-V upgraded,signal-to-noise ratio(SNR)and contrast-to-noise ratio(CNR)increased and standard deviation(SD)values decreased(all P＜0.05),but no significant difference of CT values was found(all P＞0.05).Conclusion ECG-less technology could significantly shorten CCTA examination duration,while DLIR could reduce image noise and improve image quality of CCTA.
