Arteriosclerosis is also called arterial stiffening. In the process of disease the flexible vascular walls harden and loose their elasticity, plaque develops and narrows the vessels. In the long run, the disease formation leads to a vascular stenosis and in the worst case to an arterial occlusion. CT- or MRI-guided angiography are the methods of choice which offer a very good and timely detection of even the smallest changes in the vessels. That’s how treatment can start at an early stage of disease.