The UWB phased array applicator: novel cooling solutions

Bolus plays a pivotal role in hyperthermia systems because it is not only a matching medium, but it can also help prevent unnecessary heating of the skin. In our work, the bolus is split into two parts, i.e. antenna water bolus (AWB) and the surface bolus (SB). The AWB is shaped for higher efficiency. However, this solution requires cooling of each individual antenna. For the surface bolus, a novel solution by means of hydrogel instead of typical plastic bags is proposed