Feasibility analysis of wide-detector CT coronary angiography using three-low scanning technology
10.3969/j.issn.1005-202X.2025.03.014
- VernacularTitle:宽体探测器CT冠状动脉血管成像中应用三低扫描成像技术的可行性分析
- Author:
Zixiong ZHANG
1
;
Wenjun QIAO
;
Jingjing ZHANG
;
Manman YANG
;
Jiayi CHEN
;
Meijuan ZHOU
Author Information
1. 南方医科大学公共卫生学院,广东 广州 510515;南方医科大学南方医院医学影像中心,广东 广州 510515
- Publication Type:Journal Article
- Keywords:
coronary artery;
three-low scanning;
radiation dose;
injection rate;
contrast agent dosage
- From:
Chinese Journal of Medical Physics
2025;42(3):374-380
- CountryChina
- Language:Chinese
-
Abstract:
Objective To analyze various scanning parameters and contrast agent injection schemes,and explore the feasibility of three-low scanning technology characterized by lower radiation dose,slower injection rate and reduced contrast agent dosage in coronary angiography with wide-detector CT.Methods A total of 210 patients who underwent coronary angiography were recruited and randomly divided into group A(routine group,n=105)and group B(three-low group,n=105),and all of them were examined using the Revolution CT from the American GE company.Group A and group B adopted 120 and 100 kV tube voltages,respectively.The contrast injection rate and contrast agent dosage were calculated using formulas based on body mass index and beat per minute.Image quality was objectively evaluated using CT number,signal-to-noise ratio and contrast-to-noise ratio,and subjectively scored using Likert 5-point method.Results No statistical differences were found in the basic data between two groups(P>0.05).The CT numbers of the aortic sinus orifice in coronary artery images obtained from group A and group B were(442.70±58.26)and(454.11±62.36)HU,respectively.The differences between two groups in CT number,image score,signal-to-noise ratio,and contrast-to-noise ratio were trivial(P>0.05),while statistically significant differences were noted in injection rate,contrast agent dosage,tube current,and effective radiation dose(P<0.05).Group B reduced the effective radiation dose by 33.89%as compared with group A.Conclusion Based on the patient's body mass index and beat per minute,a personalized contrast agent injection scheme can be developed.Both routine group and three-low group can obtain image quality that meets imaging diagnosis requirements,and the latter has better image quality,demonstrating that the three-low scheme benefits the patients more for it can reduce the patient's radiation dose and contrast agent dosage while achieving higher image quality.
