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Atherosclerotic disease of the great vessels. (A) VRT image of a CTA of the thorax in a patient with right arm claudication showed a critical stenosis in the first part of right subclavian artery proximal to the vertebral artery origin; (B) DSA of the same patient confirming the same finding. Incidental severe atherosclerotic disease of the right carotid bulb is also noted. VRT, volume rendering technique; CTA, CT angiogram; DSA, digital subtraction angiogram.
