1. Influence of heart rate and phase of the cardiac cycle on the occurrence of motion artifact in dual-source CT angiography of the coronary arteries 
Stephan Achenbach, MD, Michael Manolopoulos, MD, Annika Schuhbäck, MD, Dieter Ropers, MD, Johannes Rixe, MD, Christian Schneider, MD, Gabriele A. Krombach, MD, Michael Uder, MD, Christian Hamm, MD, Werner G. Daniel, MD, Michael Lell, MD 
Journal of Cardiovascular Computed Tomography 
Volume 6, Issue 2, Pages (March 2012)
DOI: /j.jcct
Copyright © 2012 Society of Cardiovascular Computed Tomography Terms and Conditions

2. Figure 1
Frequency of evaluable datasets (per-patient score 0 or 1) for all patients and for patient groups according to heart rate. A maximum of evaluable patient datasets is present during diastole (70% of the R-R interval). For high heart rates, the overall rate of evaluable datasets per time instant is lower, and the maximum is found in late systole (45% of the R-R interval).
Journal of Cardiovascular Computed Tomography 2012 6, 91-98DOI: ( /j.jcct )
Copyright © 2012 Society of Cardiovascular Computed Tomography Terms and Conditions

3. Figure 2
Frequency of datasets that are completely free of motion artifact (per-patient image quality score of 0) for each time instant during the cardiac cycle. For all heart rates, a maximum is found in diastole.
Journal of Cardiovascular Computed Tomography 2012 6, 91-98DOI: ( /j.jcct )
Copyright © 2012 Society of Cardiovascular Computed Tomography Terms and Conditions