Figure 3. Three-dimensional intravascular US (IVUS) analysis: The lumen and EEM contours, measured in cross sections of 0.1 mm each (top [transverse view] and bottom left [longitudinal view]), are automatically delineated and displayed. Lumen and EEM CSAs in one segment are measured (top right [transverse view]). Plaque-plus-media CSA is calculated as difference between EEM CSA and lumen CSA. The plaque burden is then calculated (bottom right). Expansive remodeling in response to growing plaque can be observed in this segment (top right).