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Representative images of scan and rescan analysis of lumen and outer wall boundaries for the five designated arterial segments: the distal basilar artery, the distal vertebral artery (VA (V4)), the distal internal carotid artery (ICA) supraclinoid segment (C4), the middle cerebral artery (MCA) M1 segment, and anterior cerebral artery (ACA) A1 segments, from a 55-year-old male healthy subject
