Efficient Electric Field Evaluation of a Point Source Near the Infant Torso

The key aim of this paper is the development of a simple and computationally affordable non-spherical model of the infant torso for the accurate calculation of the electric field from a nearby-located external point source. The new model consists of a multilayered host sphere containing four spherical inclusions for the representation of the different tissue group. The electric field is then determined via simulations for a Hertz dipole at 2.4 GHz substantiating the merits of the model's simplicity. Furthermore, since the model comprises simple structures (i.e. spherical bodies), the electric field can be accurately derived via dyadic Green's functions and the superposition principle for the appropriate surface boundary conditions.