Fig. 4

Two case examples illustrating discordant results between density and stiffness. The original MRI (left panel), segmented breast density (middle panel) and the stiffness ROI placed on ultrasound image (right panel) are shown. The upper Case #1 (46 y/o): breast volume 725 cm³, whole breast density 22.3%, local breast density 51.0%, and breast stiffness 1.45 m/s. The lower Case #2 (53 y/o): breast volume 411 cm³, whole breast density 14.1%, local breast density 16.4%, and breast stiffness 3.92 m/s. Case #1 has higher density but lower stiffness