Search

The paper shows the method for detecting and mapping inhomogeneities in biological tissues with using the radio-wave tomosynthesis. The method of radio-wave tomosynthesis allows calculating a three-dimensional distribution of permittivity in a studying space. The distribution gives the opportunity to determine tissue inhomogeneities, also their location and size. This method is suitable for dynamic observation of changes in education size due to harmlessness to humans. Unlike X-ray methods, for which regular doses of ionizing radiation contraindicated. Therefore, the development of non-invasive methods for the search for inhomogeneities in biological media based on radio-wave sounding is very relevant.

The concept of dielectric spherical or cylindrical particle in resonant mode as a cloak system is offered. In fundamental modes (modes with the smallest volume correspond to |m| = l, and s = 1) the field is concentrated mostly in the equatorial plane and at the surface of the sphere. Thus under resonance modes, such perturbation due to cuboid particle inserted in the spherical or cylindrical particle has almost no effect on the field forming resonance regardless of the value of internal particle material (defect) as long as this material does not cover the region where resonance takes place.

It's considered the principle possibility of creation the managed reflectors for formulation of given field distribution in the focus area. Reflectors change the reflect ratio in dependence of the external control. The proposed theoretical modeling of such controlled focused device which provides focuse to a specific point in a given distribution of the reflectors. On the basis of numerical simulation it's considered the application of this approach for the solution of the problem of radiotomography.