Application of size-specific dose estimate in improving radiation dose and images quality of coronary CT angiography
10.3969/j.issn.1005-202X.2025.10.015
- VernacularTitle:体型特异性剂量估算在改善CT冠状动脉成像辐射剂量及图像质量中的应用
- Author:
Hao ZHANG
1
;
Yiming CHEN
;
Furong LÜ
Author Information
1. 重庆医科大学附属第一医院放射科,重庆 400042
- Publication Type:Journal Article
- Keywords:
size-specific dose estimate;
coronary CT angiography;
radiation dose;
image quality
- From:
Chinese Journal of Medical Physics
2025;42(10):1369-1373
- CountryChina
- Language:Chinese
-
Abstract:
Objective To analyze the application effect of size-specific dose estimate(SSDE)in radiation dose and images quality of coronary CT angiography(CCTA).Methods A retrospective study was conducted on 56 patients undergoing CCTA at the First Affiliated Hospital of Chongqing Medical University between February 2022 and February 2025.These patients were assigned to observation group(SSDE injection),while another 56 patients undergoing CCTA during the same period were enrolled as routine group(traditional injection).The two groups were compared for coronary enhancement value,images quality score,objective parameters of images quality[image noise,CT value,contrast to noise ratio(CNR),signal to noise ratio(SNR)],radiation dose parameters[dose-length product(DLP),CT dose index volume(CTDIvol),effective dose(ED)],anteroposterior diameter,left-right diameter and fsize.Results The CCTA image quality score and coronary enhancement value in observation group were significantly higher than those in routine group(P<0.05).Compared with routine group,observation group had higher CT value,CNR,and SNR,as well as lower image noise(P<0.05).The CTDIvol,ED,DLP and SSDE of observation group were lower than those of routine group(P<0.05).The?size in observation group was smaller,while anteroposterior diameter and left-right diameter were longer than those in routine group(P<0.05).Conclusion The application of SSED protocol in CCTA scanning can effectively improve radiation dose and images quality.
