Figure 1e. Congenital aortic coarctation. (a, b) Left lateral (a) and frontal (b) volume-rendered images show aortic narrowing below the left subclavian artery (large arrow). Elongation of the supraaortic vessels also is visible (small arrow in a). (c) Contrast-enhanced axial CT scan shows enlarged internal mammary arteries (large arrows), intercostal arteries (small arrows), and descending scapular arteries (arrowheads). (d, e) Left lateral volume-rendered images show the internal mammary artery (arrowheads in d), the intercostal arteries (arrows in e), and the descending scapular arteries (arrowheads in e).