Development of a 27.12 MHz CC-LCF intraluminal applicator for hyperthermia of the esophagus

Esophageal tumors can be treated with radiation combined with hyperthermia. This study investigated the design of a 27.12 MHz capacitively coupled intraluminal applicator for hyperthermia of the esophagus to be used in combination with external locoregional heating. It consists of four independent electrodes mounted on an inflatable balloon catheter, 10mm each, Measured SAR penetration depth is 4.5mm. Spatial steering is excellent and will prove useful in heterogeneous tumors. Combination with locoregional heating showed a strong increase in temperature rise. Next step is application in esophageal cancer.