Journal of Shandong University (Health Sciences) ›› 2021, Vol. 59 ›› Issue (2): 14-18.doi: 10.6040/j.issn.1671-7554.0.2020.1428

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Clinical application of third-generation double-source CT in coronary CT angiography for patients with atrial fibrillation

CAI Fanfan1, JI Congshan2, YANG Shifeng2, GU Hui2, YUAN Xianshun2, LIU Hongwu2, QIN Songnan1, GAO Lin2, WANG Ruopeng2, WANG Ximing1,2   

  1. 1. Department of Radiology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan 250021, Shandong, China;
    2. Department of Radiology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan 250021, Shandong, China
  • Published:2021-03-05

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Abstract: Objective To evaluate the feasibility of third-generation double-source CT retrospective ECG-gated technology in coronary CT angiography(CCTA)for patients with atrial fibrillation. Methods CCTA was consecutively performed in 40 patients with atrial fibrillation(atrial fibrillation group)and 40 patients with sinus rhythm(control group)respectively. Subjective image quality was evaluated using a five-point Likert scale; objective image quality was measured with signal-to-noise(SNR), contrast-to-noise ratio(CNR), CT dose index volume(CTDIvol), effective dose(ED), and evaluable rate of coronary artery segments. Results The control group had significantly higher image quality scores(P<0.001). The image quality scores of right coronary artery(RCA)was the highest, followed by left main artery(LMA), left anterior descending(LAD), and left circumflex(LCX). There were no statistical differences in SNR and CNR between the two groups(P=0.694, P=0.663). The CTDIvol and ED in control group were significantly lower than those in AA group(P=0.004, P=0.004). There were 515 coronary artery segments(excluding one which was undiagnostic)in the control group and 507 in AA group, all of which could be evaluated. Conclusion The third-generation double-source CT retrospective ECG-gated technology can produce satisfactory image quality in CCTA for patients with atrial fibrillation, and the radiation dose is within acceptable range.

Key words: Atrial fibrillation, Coronary artery, Tomography, X-ray computer, Retrospective ECG-gated technology

CLC Number: 

  • R814.42
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