On the Possible Use of Microwave-Active Imaging for Remote Thermal Sensing (Short Papers)

Recent results have demonstrated the feasibility of quasi-real-time, active as well as harmless microwave imaging for biomedical purposes. Such a pkreess allows tomographic reconstructions based on differences in the complex permittivity of tissues, the temperature dependence of which can be used for remote thermaf sensing. A basic experiment conducted in water at 3-GH2 yielded information on spatial resolution and temperature sensitivity. Discussion is devoted to potentiaf capabilities and limitations of this remote-sensing approach in more complicated situations. Manuscript recewed January 18, 1983; revised May 3, 1983. This work was supported in collaboration with the Soci&t& d’Etude du Radant (Orsay) and the Laboratolre de Thermologie Biom6dicale (Strasbourg) in the frame of a DWegation G&v%le pour 1a Recherche Scientifique et Technique under Contract 81 M0909. J. C. Bolomey and G. Peronnet are with the Groupe d’Electromagrietisme, Laboratome des Signaux et Systemes, Ecole Sup&ieure d’Electricity, Plateau du Moulon-91190 GIF-sur-Yvette, France. L. Jofre is with the Department Electrotisica, Escuela Tecnica Superior de Ingenieros de Telecommurricaci6n, Apdo. 3002 Barcelona-34, Spain. 0018-9480/83 /0900-0777$01 .00 @1983 IEEE 778 IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. MIT-31, NO. 9, SEPTEMRER 1983