[en] Perspectives of use of track autoradiography method on thick-layered photoemulsion for tomography of microheterogeneous materials carrying by radioactive gaseous probes were studied by the methods of mathematical models. Possibilities of the method were illustrated on the system of radon and polyethylene-based composite material. It was shown that microautoradiographic variant of this method permitted to proceed the spatial localization of individual heterogeneities of structure absorbing α-radiating gaseous probe intensively