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Figure 1: normal ultrasound findings of the right vertebral artery on the ostium (V1 segment).
Figure 2: thickening of the vascular wall of the vertebral artery in the segment at the entrance to C6.
Figure 3: thickening of the vascular wall of the vertebral artery in the segment at C5-C6.
Figure 4: significant expression of asymmetric thickening of the vascular wall of the vertebral artery in the segment at C4-C5.