Abstract: This paper analyzed the relationship between superb micro-vascular imaging (SMI) carotid artery plaque characteristics and the incidence of ischemic stroke. Selected 96 patients with carotid artery plaque as research subjects, there were 76 patients occurred ischemic stroke during follow-up and set as the study group, and the remaining 20 patients without ischemic stroke were the control group. Both the two groups underwent SMI to obtain carotid plaque characteristics. Compared with the control group, the plaque thickness, plaque length, calcification degree, lipid degree were higher and the level of fiber degree were lower in the study group (P<0.05). With the increase of plaque thickness, plaque length, plaque calcification degree, lipid degree, and the decrease of fiber degree, the patients' incidence of ischemic stroke increased, and those with plaque thickness> 4 mm, plaque length> 20 mm, plaque calcification degree>20%, lipid degree>20%, and fiber degree <50% had the highest incidence of ischemic stroke. The diagnostic accuracy of SMI for ischemic stroke was 97.37% (P>0.05). In conclusion, the plaque characteristics of SMI are closely related to the incidence of ischemic stroke, and the SMI has a high value in the diagnosis of ischemic stroke.

Key words: ischemic brain stroke, superb micro-vascular imaging, carotid plaque