Figure 6.

(a) Photograph of the agarose phantom with sample holders. (b) Schematic of the phantom (top view) with five sample holders located within the RF heated area and two outside for control purposes. (c) Schematics of the phantom (frontal view) depicting the positioning of the polytetrafluoroethylene (PTFE) tubes for the insertion of fiber optic temperature sensors. The PTFE tubes were placed at each side of the sample holders (please note that the holders are not all in the same plane) at a depth of 5, 15, and 25 mm and at the bottom of the holders at a depth of 35 mm). (d) Photograph of the bow tie dipole RF antenna. (e) Setup for the electromagnetic field and temperature simulations. The phantom was placed inside a water box with a background temperature of 37 °C, and a bow tie dipole RF antenna was placed on top, centered in the heated sample.