Fig 1. A, Oblique coronal reconstruction allowing identification of the AKA as it makes the characteristic hairpin formation at its union with the anterior spinal artery. Note the continuity of the posterior branch of the intercostal artery and the AKA (arrows). B, Transverse image showing 2 contiguous enhanced spots (arrows) in the ventral surface of the cord, corresponding to the AKA and the anterior spinal artery. C, MIP axial reformatted image showing the continuity of the aorta, the intercostal artery, its posterior branch (arrow), and the AKA.