Ultrasound is currently the only mean to determine non-invasively: •the elastic properties of the arterial wall material (Young's elastic modulus) •the relationship between intima-media thickness (IMT) and elastic properties or the influence of inward or outward remodeling on arterial distensibility. Here you find also a demonstration of UltraFast doppler technology in the study of the carotids and vertebral arteries. UltraFast doppler acquisition lasts only a few seconds and then in postprocessing it is possible to do spectral analysis in up to 3 different vessels (or 3 different sites in the same vessel). It automatically identifies the frames with : 1) Maximum velocities 2) Mean velocities 3) Peak sistolic velocity. It's very fast and reliable.