  In this paper we develop a mathematical model of the distribution of
microwave electric field in heterogenous biological tissue of mammary gland. We
use this model to investigate the efficiency of the medical diagnostic method
based on microwave thermometry. Also we run a numerical modeling of
electromagnetic field in biotissue of mammary gland for various sets of the
spatial structure of biotissue. The small-scale structure is caused by a
complex combination of several components: blood flows, fat tissue, muscle
tissue, milk lobules, skin. Next we vary in the model the spatial structure of
the tissue to evaluate the effect of the heterogeneous structure of the tissue
on the distribution of the electromagnetic field in the volume of mammary
gland.
