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Figure 2 Cervical radiographs showing (A) the target lesion (thin arrows) and distal loop (thick arrow) in the left internal carotid artery and (B) furthermost advancement of the GuardWire into this vessel. In panel B, note that, although the wire had passed both the lesion and loop, the distal tip of the wire (arrow) could not be advanced cranially enough to safely inflate the balloon.