TEMPERATURE RECONSTRUCTIONS IN A DIELECTRIC CYLINDER BY MULTIFREQUENCY MICROWAVE RADIOMETRY

Due to the interest in the non-invasive measurement of subcutaneous te mperature, a four-frequency microwave radiometer system has been teste d on a two-dimensional thermal phantom consisting of a hotter tube emb edded eccentrically in a colder circular container simulating a cylind rical body region with an inhomogeneous temperature distribution. It i s shown that measured radiometric data agree with a theoretical model of the electromagnetic radiation from thermal structures. An equation for retrieving temperature distributions in homogeneous circular cylin ders has been obtained by taking regularity properties of temperature functions into account. Results of temperature reconstructions from bo th measured and synthetic data axe reported showing the capability of the method.