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Patient selection. The flowchart shows the process of enrolling patients in this study. The original population consisted of 6,314 subjects who had undergone carotid CTA studies, and we first screened the 615 subjects with mild carotid stenosis. According to the inclusion and exclusion criteria, we finally enrolled 179 subjects and included patients with TIA after CTA in the symptomatic group. CTA, computed tomography angiography; TIA, Transient ischemic attack.
