Modified BI-RADS with high-resolution DWI: comparison with high-resolution contrast-enhanced imaging in different scanners and cohorts

Motivation: High-resolution diffusion-weighted imaging (HR-DWI) demonstrated substantial or almost perfect agreement with high-resolution contrast enhanced images (HR-CE) for lexicons and categories in a single-institution cohort1. Its reproducibility in other institutions remains unknown. Goal(s): We aimed to examine if this high agreement between HR-DWI and HR-CE is reproduced in a different institution. Approach: Inter-method agreement in lexicons and categories were compared between the cohort 1 (n =108) and cohort 2 (n=35). Inter-method agreement was examined using Cohen's kappa. Results: HR-DWI and HR CE-showed moderate to good agreement in BI-RADS categorization (Weighted kappa 0.55 - 0.68). Internal signal/enhancement pattern showed good agreement (0.72 for both). Impact: The result underpins the potential use of HR-DWI as a substitute of HR-CE.