Physical Basis of RF Hyperthermia for Cancer Therapy (3) A Non-Perturbed and Non-Perturbing Thermometer at RF Heating

Abstract

A non-perturbing and non-perturbed thermometer system in RF field was developed. The probe is composed of (1) C-A thermocouple, wrapped by (2) the conductor, which encircles the C-A thermocouple, and also (3) the insulator of a low dielectric constant in the most outer layer. Production of noises and “ hot spots ” was prevented by coiling both a part of the cable of the probe and C-A thermocouple at the one of the two ends connected to a temperature monitor.
It was pointed out that the RF current, which was rectified at the junction of the thermocouple, caused noises.