Abstract：Objective: To evaluate the value of clinical application of prospectively electrocardiography(ECG)-triggered sequential acquisition for coronary computed tomographic angiography by dual-source computed tomography. Methods: The images of prospective ECG-triggered sequential acquisition for coronary computed tomographic angiography by dual-source computed tomography of 114 patients were analyzed, 18 of them underwent coronary angiography within two weeks after CT angiography. Results: The mean heart rate of the 114 patients was (63±8) beats per minute(bpm). Image quality average score was (1.65±0.59). The rate of excellent and good image quality and rate of assessable patients was 90.35% and 99.12%. 1 297 coronary artery segments were explored. The rate of assessable segments was 96.53%. The average effective radiation doses was (6.27±1.81) mSv. Thirty-eight patients were diagnosed as coronary artery disease by dual-source CT. Forty-eight stents of 21 patients were evaluated. Forty-three stents were easy and smooth. Four stents were in-stent restenosis. One stent was in-stent occlusion. Set the results of coronary angiography as criteria, the sensitivity, specificity, positive predictive value and negative predictive value of dual-source CT coronary angiography for the diagnosis of coronary artery were respectively 95.45%, 96.00%, 91.30% and 97.96% in 72 arteries of 18 patients. Conclusion: Prospective electrocardiographic-gated transverse dual-source CT is a kind of safe, effective, low-dose and noninvasive CT coronary angiography. It is also a valuable modality for the follow-up of coronary stent patency.
2014, Vol. 25 
