title: [Optimal conditions for the formation of a radiation beam in gamma-therapeutic equipment].
abstract: The symmetry and reproducibility of the radiation field in the gamma-therapeutic device should be considered in terms of the recommendations given in the IEC Publications for medical electron accelerators, since the requirements for the exposed dose are similar in both cases. The calculations of the relationship between the source volume luminosity and the dimensions of the collimator system have shown that the increase in the diameter of the shutter hole for the operating beam results in much lower requirements for the source-shutter alignment, and so asymmetry and instability of the radiation field are essentially excluded.
mesh_terms: D001830:Body Surface Area; D005720:Gamma Rays; D006801:Humans; D009369:Neoplasms / Q000532:radiotherapy; D011878:Radiotherapy / Q000295:instrumentation*; D011879:Radiotherapy Dosage; D013679:Technology, Radiologic / Q000295:instrumentation*
vernacular_title: Ob optimizatsii trakta formirovaniia rabochego puchka izlucheniia terapevticheskikh gamma-apparatov.