Fig. 3
From: Real-time aortic pulse wave velocity measurement during exercise stress testing
MRI PWV analysis. a Region of interest selection guided by anatomical images (left) and corresponding RACE phase image (right). b Correction for stationary tissue signal in the complex domain, with proximal (superior) slice signal in the vessel region shown in blue and distal (inferior) signal in green. b-i Raw data plotted in the complex plane, showing centroids marking slow flow signal. b-ii Complex signal relative to the reference static tissue point. b-iii Phase waveforms relative to the reference point. b-iv Estimation of foot transit time