Figure 1.

A 50-year old woman with liver metastasis cancer resulted from breast with complete response (CR) to bipolar radiofrequency ablation (BRFA). A. Arterial-phase contrast-enhanced ultrasound (CEUS) before BRFA shows a hyperenhanced tumor (arrow); B. Contrast-enhanced magnetic resonance imaging (CEMRI) shows peripheral enhancement of the tumor in the arterial phase (arrow) before BRFA; C. CEUS after BRFA: the tumor shows non-enhancement (arrow) in the arterial phase; D. CEMRI also shows non-enhancement (arrow) in the arterial phase.