Fig. 4.
Comparison of differences between AI and Radiologist measurement of airspace opacity extent. A Airspace opacity extent percentage as a function of observer. Adjusted R2 = 0.656; Spearman ρ = 0.797. Overall agreement is considered excellent for positive cases (single fixed raters ICC = 0.810, 95% CI 0.765–0.840). Agreement for all cases is considered excellent (single fixed raters ICC = 0.820, 95% CI 0.790–0.840). B Bland–Altman plot for difference of methods. Mean difference -22.4%; SE 21.1%. C Confusion matrix for discrete scores compared between expert and AI. Weighted macro F1 score for categorical agreement is 0.157