901642.fig.002
Figure 2: 2D conventional US (a) and virtual touch tissue imaging (VTI, b). Tumor mass after RFA is remarkably darker (stiffer) than adjacent hepatic parenchyma on VTI. The ablated size of VTI (34.8 mm × 43.1 mm) is larger than that of 2D conventional US (27.1 mm × 38.7 mm).