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Fig. 6. —Effect of tissue perfusion on radiofrequency ablation. Range of perfusion states (0-10 kg/m³-sec) are presented. Hypervascular tumor perfusion acts as significant thermal sink at all tumor sizes and electrical conductivities. Height of surface contour lowers as perfusion increases from 0 to 10 kg/m³-sec, while peak only shifts slightly. Surface responses show that perfusion significantly affects radiofrequency heating. S/m = siemens per meter.