Table 4:

Kappa statistical evaluation for interobserver performance of ischemic lesion mismatch (CBF/CBV lesion size) detection for 3 independent observers

κ CoefficientPercentage AgreementStatistical Significance
C-arm (n = 12)0.3166.6%P = .03
PCT (n = 12)0.0777.7%P = .34
  • Note:n = total number of perfusion maps presented to a single observer.