Fig. 1

Representative examples of segmentation of FFDM using LIBRA. a Segmentation using FOR PROCESSING images; b the same breasts segmented using FOR PRESENTATION images. In red the breast area; in green the dense area. There are large differences in the main breast area (pectoral muscle removal) and in the dense area. c, d An example from another woman representative of very large errors with consequently wrong Percent Density (PD)