Sensitivity, specificity, positive predictive value, negative predictive value, Kappa index of transcranial ultrasound versus magnetic resonance imaging turn on middle cerebral artery M1 segment was 82.86%, 97.97%, 82.86%, 97.07%, 0.799; M2 segment was 80%, 98.29%, 50%, 99.57%, 0.605; anterior cerebral arteries was 40%, 99, 57%, 66.67%, 98.73%, 0.49; and internal carotid artery segment in the skull is 68.42%, 99.55%, 92.86%, 97.35%, 0.773.