Title: Relationship between heart rate and best reconstruction phase for coronary CT angiography using dual-source CT.
Abstract: Objective To investigate the relationship between the optimal reconstruction phase and heart rate and to determine the optimal systolic and diastolic reconstruction intervals for coronary CT angiography using dual-source CT.Methods Two hundred patients suspected of having coronary artery disease(CHD) underwent dual-source computed tomography.Data were reconstructed in 5% steps throughout the R-R interval.Two independent readers selected optimal systolic and diastolic reconstruction windows for each major coronary vessel.Results In most patients with a heart rate 80 bpm,the median optimal systolic reconstruction windows were at 35%,40%and 35% for RCA,LAD and LCX(2.95±0.86,3.45±0.44,and 3.10±0.52,P0.05).In patients with a heart rate ≤80 bpm,the median optimal diastolic reconstruction window was at 75% for all vessels.Conclusion In patients with heart rates ≤80 bpm,optimal reconstruction windows were at 75% of the R-R interval,and in patients with heart rates 80 bpm,systolic reconstructions were selected to yield superior image quality.
Publication Year: 2009
Publication Date: 2009-01-01
Language: en
Type: article
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