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Figure 1. Experimental apparatus. An internally cooled RF electrode (solid arrow) has been inserted into an NaCl gel-filled well within an agar phantom (short open arrow), which is placed in a saline bath at a fixed distance from the grounding pad (G). A thermocouple probe (arrowheads) has been inserted to measure temperature 20 mm from the electrode. An acrylic guide (long open arrow) ensures proper positioning of the thermocouple. The RF generator and a temperature measurement device can be seen in the background.
