Figure 1

Scout images for quantifying aortic arch PWV. a) Oblique sagittal image of the aorta for prescribing an axial image; b) Complex difference signal intensity plotted as a function of time showing approximately three cardiac cycles. The transit time of the pressure pulse wave is estimated by computing the average “width” of the black parallelogram (first full cardiac cycle around t = 2 s). The height of the parallelogram was prescribed using a graphical user interface written in C++.