Non-invasive determination of hepatic steatosis by acoustic structure quantification from ultrasound echo amplitude

Figure 2 Schematic of region of interests used for statistical analysis of the radio frequency signal with the acoustic structure quantification method, and the C_m²-histogram. A: The set large-region of interest (ROI) actually consists of several hundred small ROIs used to calculate multiple C_m² (intensity or amplitude) values; B: Results are shown as the occurrence in the C_m² histogram.