A Comparison of the Annular Phased Array to Helical Coil Applicators for Limb and Torso Hyperthermia

The BSD annular phased array (APA) and miniature annular phased array (MAPA) have been compared to helical coil applicators designed for the trunk and thigh, respectively. All four applicators were tested using both cylindrical saline phantoms and a phantom-filled mannequin. Patterns of deposition were determined using both an implantable electric field probe and local values of the rate of temperature increase. Scattered fields were measured when the APA and trunk helix were used with the phantom-filled mannequin.