Heating properties of the resonant cavity applicator with ultrasound monitoring system for effective hyperthermia treatments

In this study, we discuss the effectiveness of a resonant cavity applicator with an ultrasound monitoring system. We have already proposed a non-invasive heating method using the resonant cavity applicator for hyperthermia treatments, and confirmed the possibility of controlling the heated area and the location of a hotspot. However, this applicator did not have a monitoring system to detect the location and size of the target. In the present paper, to overcome this problem, we propose a monitoring system using a commercial diagnostic ultrasound imaging system. In order to show the validity of the proposed resonant cavity applicator with the ultrasound monitoring system, we reconstructed a 3-D model from 2-D ultrasound images to detect the location and size of the target and to calculate temperature distributions inside a heated object. From these results, we found that the proposed system is useful for effective hyperthermia treatments.