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Fig. 1 | BMC Neurology

Fig. 1

From: Are the anomalous vertebral arteries more hypoplastic?: retrospective linear mixed model approach

Fig. 1

Left VAs (arrows) originating from (a) the subclavian artery and (b) the aorta on a three-dimensional MR angiography. Axial source images (window level = 400 Hounsfield Units, width = 1400 Hounsfield Units) of the CT angiography showing that the left VA (c, arrow) did not penetrate the C6 transverse foramen (arrow head) but that it passed through the C5 transverse foramen (c, curved arrow). Three-dimensional reconstructed CT image (d) showing a left VA (arrow) with an aortic origin and an empty left C6 transverse foramen (arrow head)

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