Feasibility study of non-ECG-gated wide-body detector for left atrial CT angiography examination
10.3969/j.issn.1002-1671.2025.11.026
- VernacularTitle:无心电门控宽体探测器在左心房CT血管成像检查中的可行性研究
- Author:
Jun XING
1
;
Yanbing SUN
1
;
Ye DONG
1
;
Xufeng LIU
1
;
Hong YU
1
;
Lin ZHU
1
Author Information
1. 上海市胸科医院 上海交通大学医学院附属胸科医院放射科,上海 200030
- Publication Type:Journal Article
- Keywords:
simulated ECG-gated;
low-dose;
patient comfort
- From:
Journal of Practical Radiology
2025;41(11):1877-1881
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the feasibility of non-ECG-gated scan using wide-body detector in left atrial computed tomo-graphy angiography(CTA)and to assess its value in evaluating left atrial appendage closure(LAAC)outcomes.Methods Patients who underwent LAAC and completed left atrial CTA were prospectively selected.Participants were randomly divided into groups A and B.In group A,the heart rate was measured using a finger clip oximeter before the examination,and the heart rate was set as the simula-ted heart rate.The simulated signal was generated by the CT equipment to complete the examination.In group B,the conventional ECG-gated scan was adopted.The residual leakage of left atrial appendage occluder,image quality,patient comfort and radiation dose of the two groups were compared,and statistical analysis was performed for these indicators.Results Both groups completed the evaluation of the endothelialization degree of the left atrial appendage occluder,and there was no significant difference in the objective image quality evaluation or subjective image score between the two groups(P＞0.05).The total scores of the physiological dimension,psy-chological dimension,social cultural dimension and environmental dimension of patients in group A were higher than those in group B(P＜0.001),and the volume CT dose index(CTDIvol)and dose length product(DLP)decreased by 25％and 25.36％respectively,with statistically significant differences(P＜0.001).Conclusion During the left atrial CTA examination,the wide-body detector with non-ECG-gated scan mode can provide good image quality for clinical use and observe the embolization of the left atrial appendage after LAAC surgery.At the same time,it can effectively reduce the radiation dose for patients and improve patient comfort dur-ing the examination,showing high clinical feasibility and appli-cation value.
