Statistical Evaluation of a Fully Automated Mammographic Breast Density Algorithm

Figure 4

Box-and-whisker plot displaying the distribution of reference standard mammographic density assessments falling into the algorithm-derived classifications designated by the standard 4-level BI-RADS density lexicon. Ideally, each of the boxes and their whiskers should be entirely contained in their respective BI-RADS levels. The reference standard mammographic density assessments in the lowest and the highest BI-RADS levels are well classified, while the middle two levels overlap in both directions into adjacent BI-RADS levels.