The monitoring conditions were the same for all samples, i.e. there was applied the same distance of each sample from
the RTG-tube and the same set-up of the RTG-emitter parameters. The volumetric point ‘‘voxel’’ is a cube with the side length
160 lm (Fig. 4). This value is sufficient for the external and internal defectoscopy of the samples. Reduction of the voxel
dimensions is possible with regard to the RTG-tube parameters according to the material density.