A-050 16 This presentation focuses on technical backgrounds and requirements for successful acquisiton of angiographic MR and CT data to a minor extent. Apart from conventional techniques also functional imaging approaches for quantifying disease severity will be presented such as MR-flow measurements and time-resolved phase-contrast MRA. The main focus of this presentation is the display of typical disease entities that can be encountered in the thoracic and abdominal aorta. The topics covered will include atherosclerosis, congenital vessel diseases and inflammatory vessel diseases such as Takaysu's diseaes or pseudoaneursyms. Special emphasis will be put on the implications for therapy that can be deducted from the MRA and CTA data. Finally, MRA and CTA will be compared with regard to their diagnostic capabilities and their optimal applications. Learning Objectives: