Figure 3
Measurement of pulse-wave velocity: Reference axial images (superior, a, and inferior, c) and temporally-resolved complex difference intensity (|CD|) images (b, d). Velocity-encoded projections were acquired simultaneously for quantifying iliofemoral PWV. The systolic peaks are clearly visible on the corresponding velocity images (b and d). The time-courses of right iliac and femoral artery |CD| images (e) show three cardiac cycles. Note temporal offset in the arrival of the pulse pressure wave in the distal femoral artery with respect to proximal iliac artery. Venous flow velocity is lower by an order of magnitude compared to arterial flow velocity thus they are not visible or interfere with arterial |CD|.