Figure 3a:

Data from 50-year-old man with high proton density fat fraction (28%) (participant with nonalcoholic fatty liver disease, denoted participant B). Computer-reconstructed nonenhanced ultrasound B-mode image (transverse plane with time gain compensation) and underlying radiofrequency signals. (a) B-mode image frame 1 for participant B, with yellow outline superimposed to indicate region of interest for deep learning analysis. (b) Radiofrequency signals corresponding to blue dashed line shown in a, without and with time gain compensation. Boundaries of the liver are not well delineated, and it is unclear whether the fixed region of interest includes signals from outside the liver.