Figure 3

Thermal images of the coated capsules in the presence of the alternating magnetic field at time t = (a) 30 s, (temperature maximum 35.43 °C) (b) 90 s, (temperature maximum 37.33 °C) (c) 150 s, (temperature maximum 51.12 °C) and (d) 210 s, (temperature maximum 64.54 °C). The drawn circle surrounding the capsule indicates the position of the RF coil. Photographs of the coated capsule above the RF coil (e) before and (f) after exposure to the alternating magnetic field.