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Decision tree based on classification of the IBAGS and MBGS. The decision tree shows two nodes: (A) color density based on IBAGS, (B) brightness density based on IBAGS, (C) color density based on MBGS, and (D) brightness density based on MBGS. Horizontal numbers (x-axis) in node graphs indicate the vascularity score using the IBAGS grades in (A) and (B), whereas those in (C) and (D) indicate the vascularity score using the MBGS grades.
