Vascular colour Doppler ultrasound is an advanced, non-invasive echographic technique that provides information on the vascular structure. It measures blood flow in different areas of the body’s circulatory system and determines the presence of atheromatous plaques and flow obstructions in arteries and veins. It studies the arteries that supply the brain, arteries in the neck, the aorta, renal arteries and the arteries in the lower and upper limbs.