Figure 7c. Palliative tumor ablation in a 62-year-old man with a painful 7-cm hepatocellular carcinoma in his liver. (a) Axial CT scan obtained before ablation shows internal calcifications (arrows). (b) Axial CT scan shows three single microwave antennae, which were positioned with fluoroscopic guidance into the center of the lesion. Two 10-minute, 45-W ablations were performed. (c, d) Postprocedure axial CT scans obtained with contrast material enhancement in the arterial (c) and portal venous (d) phases show a large area of thermocoagulation (arrows) with no internal enhancement. The patient was observed after the procedure and later discharged to home with no immediate complications. His pain resolved within 2 days after the procedure.