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Figure 6: Three-dimensional reconstructed computed tomographic angiography images showing (a) in a patient with atlanto-axial dislocation, a low-lying posterior inferior cerebellar artery arising from V3 segment of vertebral artery (VA) (type 2e; thick arrow); (b and c) Medial looping of the third segment of VA (thin arrow; type 3b)

Figure 6: Three-dimensional reconstructed computed tomographic angiography images showing (a) in a patient with atlanto-axial dislocation, a low-lying posterior inferior cerebellar artery arising from V3 segment of vertebral artery (VA) (type 2e; thick arrow); (b and c) Medial looping of the third segment of VA (thin arrow; type 3b)