A simple model for calculatingrelative biological effectiveness of x-rays and gamma radiation in cell survival.

CONCLUSIONS: By combining an innovative method for calculating [Formula: see text] with a microdosimetric model, we developed a model that is consistent with extensive experimental data involving photon energies from 0.27 keV to 1.25 MeV.
ADVANCES IN KNOWLEDGE: We have developed a photon RBE model applicable to an energy range from ultra-soft x-rays to megaelectron volt γ radiation, including high dose levels where the RBE cannot be calculated as the ratio of α values. In this model, the ionization density represented by [Formula: see text] determines the RBE for a given photon spectrum.
PMID: 32464080 [PubMed - as supplied by publisher]

Source: The British Journal of Radiology - May 27, 2020 Category: Radiology Authors: Vassiliev ON, Peterson CB, Grosshans DR, Mohan R Tags: Br J Radiol Source Type: research