Clinical application of auto-ECG-gating technique of 256 row CT coronary angiography in patients without heart rate control
10.13929/j.1003-3289.201611037
- VernacularTitle:256排宽体探测器CT智能心电门控技术在不控制心率患者冠状动脉CTA中的应用
- Author:
Fang WANG
;
Wanqing HAO
;
Lili YANG
;
Jingyao ZHENG
;
Ruoshui HA
;
Zerun WANG
;
Yongpei CAO
;
Fei HUANG
- Keywords:
Angiography;
Tomography,X-ray computed;
Coronary disease
- From:
Chinese Journal of Medical Imaging Technology
2017;33(7):1080-1084
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the image quality and diagnostic efficiency of coronary CTA (CCTA) in patients without heart rate (HR) control by optimizing acquisition phase with auto-ECG-gating technology using 256-row wide-volume detector.Methods Totally 200 patients with suspected coronary artery disease (CAD) were selected and underwent CCTA with auto-ECG-gating on a 256 row wide detector CT (Revolution CT).Patients were divided into 4 groups according to the real-time HR,group A (n=50):HR≤69 bpm;group B (n=50):HR 70-80 bpm;group C (n=50):HR 81-90 bpm;group D:HR≥91 bpm (n=50).CCTA images quality and diagnostic rate were assessed by two experienced radiologists blindly,and effective radiation dose were compared among 4 groups.Results There were no significant differences of age,sex,and body mass index among 4 groups (all P＞0.05),and there was significant difference of image quality score among 4 groups (P＜0.05).Totally,800 coronary arteries and 2 575 segments in 200 patients were assessed.There had no significant difference of diagnostic rate among four groups derived from the segment,coronary artery and patients (all P＞0.05).The effective radiation dose in A D groups were (1.05t0.48)mSv,(2.41± 1.20)mSv,(1.27±0.55) mSv,(2.66±1.12)mSv,and the difference was significant (F=29.22,P＜0.001).Conclusion It is feasible to perform CCTA in single cardiac cycle in patients with arbitrary heart rate by auto-ECG-gating using Revolution CT equipped widevolume detector.And it can improve image quality and success ratio in patients with moderate and high heart rate.
