Fig. 2
From: Value of inversion imaging to diagnosis in differentiating malignant from benign breast masses
Representative images of the masses’ general appearance by inversion score. Inversion imaging of A: 1 point, B: 2 points, C: 3 points, D: 4 points, and E: 5 points. The white region(defined as “Dense Threshold Region”) indicates the breast mass region on inversion images, and the black-white-gray interlaced region (defined as “Non-dense Threshold Region” ) represents the internal acoustic impedance difference