Fig. 2

a Aortic flow-curves from PC cine imaging. We used the validated method cross-correlation to determine the time delay (∆t) between the proximal and distal flow curves [20]. b Sagittal angulated cine image which shows the orientation of scan planes for PC imaging. The distance between the particular positions (∆t) was measured by drawing a curved-line following the midline course of the thoracic aorta