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Transmission ultrasound images of a dense breast quantitative breast density (QBD = 62.4%). Top row, speed of sound (SOS). L to R: coronal, axial, sagittal. Middle row, segmentation with skin. Bottom row, corresponding total breast volume. There is clear correlation between the total breast volume, the segmentation, and the high‐speed tissue. The segmentation is based on SOS > 1489 m/s.
