Thermal profile reconstruction in the steady state during microwave hyperthermia based on microwave radiometry measurements: bidimensional aspects

A method for bidimensional thermal profile reconstruction in the steady state during microwave hyperthermia has been developed. It is based on experimental radiometric measurements taken during the heating session. Two numerical programs have been developed: the first, which is based on the bioheat equation, gives a bidimensional thermal profile in the multilayered inhomogeneous medium; the second calculates the radiometric temperatures corresponding to this thermal profile. The two programs are combined in an optimization algorithm that is used to deduce the bidimensional thermal profile, accounting for the experimental radiometric temperatures. Comparisons between theory and experiments on phantoms, animals, and more recently on patients have given good results