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Figure 4


Fig. 4 —Schematic drawing showing points at which diameter and length were measured by both MR angiography and digital subtraction angiography in patients with thoracic aortic aneurysm. (1) Diameter of aorta at proximal extent of aneurysm, (2) diameter of aorta at distal part of aneurysm, (3) diameter of aorta at level of left subclavian artery, (4) length of thoracic aneurysm, (5) proximal caudal neck of aneurysm, (6) maximum diameter of left external iliac artery, (7) distance between left common carotid artery and left subclavian artery, and (8) diameter of aorta at level of left common carotid artery.