Fig. 3

a Segmented gradient echo scout images showing in-plane (left) and proximal through-plane (right) right coronary artery (arrows). b Single early diastolic frame from the corresponding high temporal resolution spiral phase velocity mapping study acquired with water-excitation (WE) (magnitude image on left, velocity map on right) together with corresponding fat-excitation (FE) images. c CMR velocity-time curve before (top) and after (middle) correction for through-plane velocity of the vessel and corresponding Doppler guide wire trace (bottom). On the Doppler guidewire trace, the peak pixel velocity within the sample volume is highlighted in blue