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Distance from the mid-vertebrae line to the origin of the major branches
A : Distance from the mid-vertebrae line to the origin of the brachiocephalic trunk, B : Distance from the mid-vertebrae line to the origin of the left common carotid artery, C : Distance from the mid-vertebrae line to the origin of the left subclavian artery, SD : standard deviation, negative (-) : right side based on the mid-vertebral, line positive (+) : left side based on the mid-vertebral line
