Analysis of the pulse-modulated microwave propagation into 3D anisotropic heart model by SIE method

Abstract

Here we present the electrodynamical analyses of microwave pulses propagation in a 3D anisotropic heart model for the first time. The electrodynamical rigorous solution of Maxwell's equations related to the microwave pulse propagation in the 3D heart model with anisotropic and isotropic media is presented here. The myocardium tissue media is an anisotropic lossy media and blood is an isotropic lossy media. The boundary problem was solved by using the singular integral equations' (SIE) method. Our solution, obtained by the SIE method, is electrodynamically rigorous. The false roots do not appear and the boundary conditions have to be satisfied only on the surfaces dividing di®erent materials. The frequency of the carrier microwave is 2.45 GHz. The modulating signals are triangular video pulses with the on-o® time ratio equal to 5 and 100. The pulse durations were always equal to 20 ¹s. Microwave electric field distributions were analysed at three longitudinal cross-sections of the heart model. The distributions of electric field for the anisotropic and isotropic heart models are compared here.