915 MHZ MICROWAVE INTERSTITIAL HYPERTHERMIA .1. THEORETICAL AND EXPERIMENTAL ASPECTS WITH TEMPERATURE CONTROL BY MULTIFREQUENCY RADIOMETRY

Microwave interstitial hyperthermia now plays an increasing part in th e various hyperthermia techniques used in cancer treatment. This paper will present the design, construction and theoretical as well as expe rimental study of miniature coaxial antennas designed to heat tumours of various volumes and sizes. Monitoring temperature using multifreque ncy radiometry during hyperthermia stems naturally from the very desig n of these antennas. Experiments on phantoms, animals and patients in phase I clinical assessment have demonstrated that microwave interstit ial hyperthermia can be achieved with temperature control and monitori ng by microwave radiometry.