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Anterior Spinal Artery and Artery of Adamkiewicz Detected by Using Multi-Detector Row CT

Kohsuke Kudoa, Satoshi Teraea, Takeshi Asanoa, Masaki Okaa, Kenshi Kanekoa, Satoshi Ushikoshia and Kazuo Miyasakaa

a From the Department of Radiology, Hokkaido University Graduate School of Medicine, Sapporo, Japan



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  		FIG 1. CT scans obtained from patient 2, a 52-year-old woman.

A, Coronal multiplanar reconstruction scan shows the ASA along the anterior midsagittal surface of the spinal cord (small white arrows). The large radiculomedullary artery (black arrow), which is defined as the AKA, arises from the left T10 level and joins the ASA. Both the ascending and descending branches of the ASA distal to the junction with the AKA are seen, but the ascending branch is narrower than the descending branch. The spinal branch (curved white arrow) arises from the left 10th intercostal artery (large white arrow).

B, On the dorsal section of the coronal view, the continuity of the radiculomedullary artery and intercostal artery (large white arrow) via the spinal branch (curved white arrow) is confirmed.

C and D, Axial scans show the ASA (small white arrows) and AKA (black arrows) in the dural sac. The continuity of the intercostal artery (large white arrow), spinal branch (curved white arrows), and radiculomedullary artery (black arrows) is also seen.

E, Curved multiplanar reconstruction scan allows the visualization of the continuity of the intercostal artery (large white arrow), spinal branch (curved white arrow), radiculomedullary artery (black arrow), and ASA (small white arrows) on a single section. The change of caliber of these vessels is also seen.



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  		FIG 2. CT scans obtained in patient 3, a 54-year-old man.

A and B, Coronal scans show ASA (small white arrow) and AKA (black arrows). Thorough inspection reveals that the top of the hairpin curve is visualized at the upper edge of the scan. The continuity of the 10th intercostal artery (large white arrow), spinal branch (curved white arrow), and radiculomedullary artery (black arrows) is obscure because of close attachment of these vessels to the bone as a result of narrow intervertebral foramen.



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  		FIG 3. CT scans obtained in patient 13, a 52-year-old man.

A, Coronal multiplanar reconstruction scan shows the radiculomedullary artery (black arrows) arising from the left L1 level and joining the ASA (small white arrows). Both the ascending and descending branches of the ASA are seen.

B, Because the radiculomedullary artery (black arrow) is slightly tortuous, the continuity of the vessel is confirmed on the section dorsal to that shown in A.



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  		FIG 4. CT scan obtained in patient 17, a 25-year-old male patient. Coronal view multiplanar reconstruction scan shows the ASA (small white arrow) as visualized from the top of the scanning range. The radiculomedullary artery is not detected. The upper level of the scanning range is T11 level for this patient. The AKA is expected to arise from a more cranial level.





Copyright © 2008 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X