The study was carried out on 69 patients with acute cerebral infarction caused by large cerebral artery occlusion (internal carotid artery and middle cerebral artery) hospitalized after 6 hours of cerebral perfusion imaging (CT Perfusion, MRI Perfusion) treated in combination with artificial intelligence software (RAPID) to remove intravascular thrombus during the period from January 2020 to March 2022 at Phu Tho Provincial General Hospital.