Figure 4. (A) Pretreatment CT scan in a patient with two large liver metastases (arrows) from colorectal cancer. (B) CT scan 1 month after resection of the left lobe lesion and RFA of the right lobe tumor that measured 11.0 × 8.0 × 6.5 cm. There is complete necrosis of the large right lobe lesion (open arrows) that was treated with multiple intraoperative applications of RF energy to all areas of the tumor.