Análisis de los efectos radiobiológicos generados por haces de fotones de RX de 6 MeV incidentes en un maniquí de pulmón simulado en geant4

Abstract

In radiotherapy different ranges of energies are used depending on the area of ​​the body to be treated, to avoid risks and a higher economic cost generally, simulations with established variables are used. The present work presents a simulation generated in Geant4 software whose foundation is the Monte Carlo method. Initially, the physics to be used in the simulation was selected, using the G4Penelope library to obtain greater precision in data collection. Next, a thorax was constructed based on the measurements and densities of the CIRS 002LFC model. A source of X-rays (RX) emitted with the Bremsstrahlung effect is established at an energy of 6 mega-electronvolt (MeV) in the direction of the isocenter of the phantom. Subsequently, a detector is created in the geometric center of the phantom which measures deposited dose and deposited energy. To avoid the dispersion of the photons, a collimator with a conical geometry is produced which focuses the RX beam. In the characterization of the beam, it was necessary to simulate a water tank as a detector to determine the depth dose curve, where the information obtained from the International Atomic Energy Organization in technical report 398.