Fig. 5.

Image quality score results. The results of visual image quality scores based on helix angle (HA) maps shown as histograms for systolic (a), sweet-spot (b) and diastolic (c) data normalised to the number of acquisitions. Each HA map was visually scored from 0 (<50% of the myocardium demonstrating a normal transmural HA progression) to 3 (>95% normal HA progression). Statistical comparisons between the image scores at each cardiac phase were performed using the Wilcoxon signed-rank test and the corresponding p-value is shown on each plot