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Updated: Jun 16, 2026

Cardiac Magnetic Resonance for the Evaluation of Suspected Cardiac Thrombus: Conventional and Emerging Techniques
Published on: June 11, 2019
Low dose prospective ECG-gated delayed enhanced dual-source computed tomography in reperfused acute myocardial
Rui Wang1, Zhaoqi Zhang, Lei Xu
1Department of Radiology, Beijing Anzhen Hospital, Capital Medical University, 100029 Beijing, China. rui_wang1979@yahoo.cn
Purpose:
To determine whether prospective electrocardiogram (ECG)-gated delayed contrast-enhanced dual-source computed tomography (DCE-DSCT) can accurately delineate the extension of myocardial infarction (MI) compared with delayed enhanced cardiac MR (DE-MR).
Material And Methods:
Eleven patients were examined using dual-source CT and cardiac MR in 2 weeks after a first reperfused MI. DCE-DSCT scan protocol was performed with prospective ECG-gating sequential scan model 7 min after contrast administration. In a 17-model, infarcted myocardium detected by DE-MR was categorized as transmural and subendocardial extension. Segment of infarcted location and graded transmurality were compared between DCE-MDCT and DE-MR.
Results:
In all eleven patients, diagnostic quality was obtained for depicting delayed enhanced myocardium. Agreement between DCE-DSCT and MR was good on myocardial segment based comparison (kappa=0.85, p<0.001), and on transmural and subendocardial infarction type comparison (kappa=0.82, p<0.001, kappa=0.52, p<0.001, respectively). CT value was higher on infarcted region than that of normal region (100.02±9.57 HU vs. 72.63±7.32 HU, p<0.001). Radiation dose of prospectively ECG-gating protocol were 0.99±0.08 mSv (0.82-1.19 mSv).
Conclusions:
Prospective ECG-gated DCE-DSCT can accurately assess the extension and the patterns of myocardial infarction with low radiation dose.
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