[Non-compact right ventricular myocardium - diagnostic and clinical features: A review].

Non-compact right ventricular myocardium is a rare type of cardiomyopathy, it usually results from arrested myocardial development during embryogenesis. This disease can be characterized by excessive prominent trabeculations and deep inter-trabecular recesses in the ventricular wall. It might be a component of biventricular non-compact cardiomyopathy or an isolated form. The article presents a review of the literature on the clinic and radiation diagnostics of non-compact right ventricular myocardium with the presentation of the issues of differential diagnosis.

The effect of heterogeneity in gamma-ray albedo analysis of mineral raw materials.

The influence of heterogeneity on the results of a gamma-ray albedo analysis of heterogeneous raw materials has been considered. The heterogeneity error components, caused by dispersing the defined element in the bulk under study and by the direct influence of the particles dimension (grain size) on the intensity of the scattered gamma-rays, have been determined. Mathematical models to describe the dependence of the error on the chemical composition of the raw material under study, the component densities, the particles dimensions and the primary gamma-radiation energy have been suggested.