LAUSR

New techniques of CT digital subtraction angiographic imaging allow to study the aortic blood flow in case of abdominal aortic aneurysm and find unfavorable elements for a greater risk of rupture. On the other hand, the intraluminal thrombus, whose growth is facilitated by a turbulent blood flow, damages the aneurysm walls through immune-inflammatory mechanisms, connected with release of proteases and specific metalloproteinases. Besides, the vasa vasorum thrombosis causes hypoxia in the aortic walls and, through a secondary production of oxygen reactive species, a proportional oxidative stress. Today, these pathological elements can be firstly researched with a Color Doppler US and CT angiography, but also with PET/CT to discover an inflammatory state. In addition, RMI can demonstrate a fragmented and laminated feature of the intraluminal thrombus, its high elastase content and correlated elastin reduction in the aneurysm medial layer. These data have not yet a mathematical translation.