Fig. 2

A patient with a history of hepatectomy and cholecystectomy. The index tumor was in segment 4 and ablated with RFA. Ultrasound (a) and MR (c) images show that the distance between the index tumor (white arrow) and intestine (red arrow) was < 5 mm. b A PTC needle is inserted with the tip (arrow) in the gap between the tumor and the intestine. Perfusion of normal saline established a local thermal barrier (double arrow line). d The RFA zone was about 3 cm × 2 cm and was measured 3 cm along the needle tract to control the size. After ablation, CEUS (e) and CEMR (f) show that the tumor was completely ablated