Figure 2From: Non-invasive single slice estimate of aortic distensibility from phase-contrast MRI: application to hypoplastic left heart syndromeMagnitude and phase-contrast images (left), from which area and velocity signals are derived (centre). Velocity and ln(area) information are combined in order to obtain a loop (right), whose initial slope yields the value of wave speed (red line), directly related to distensibility.Back to article page