Abstract:Objective: To evaluate imaging quality of the coronary arteries with wide range ECG-gated thoracic and abdominal angiography using 256 slices CT. Methods: Thirty-four patients with chest pain undertook wide rage ECG-gated scanning using 256 slices CT, and coronary arteries were reconstructed. The image quality and diagnosis were evaluated and compared with conventional coronary CT scanning. Results: All 508 segments in the group of wide range ECG-gated scanning were characterized, among which 89.7%(456/508) of the segments was of high-quality and 95.5%(485/508) of the segments could be evaluated. And 512 segments in the group of conventional scanning were characterized, among which 89.8%(460/512) of the segments was of high-quality and 96.3%(489/512) of the segments could be evaluated. There was no significant difference in image quality between the two groups(χ2=1.072, P=0.192). Conclusion: Imaging quality of the coronary arteries with wide range ECG-gated thoracic and abdominal angiography using 256 slices CT can meet the requirement in patients with arrhythmias, and has high value of clinical application.