Photographs of the surgery and the ultrasound images taken during the procedure.

(A) Placement of two electrodes (dashed arrows) through a grid (solid line arrow) into the liver. (B) Use of an intraoperative ultrasound (solid arrow) to monitor the placement of the probes and the tissue ablation. (C) Ultrasound images of an electrolytic treatment with two electrodes (note the bright hyperechoic area—marked by arrow). (D) Ultrasound images of an electroporation treatment with four electrodes (note the bright hyperechoic area—marked by arrows). (Bottom right figure used with permission of the publisher [44]).