Results 31 to 40 of about 2,643 (174)

Characterization of a 0.5 × 0.5 mm plastic scintillating detector for small field dosimetry: Its performance and comparison with other commercially available plastic scintillating detectors. [PDF]

J Appl Clin Med Phys
Abstract Background Lack of an ideal detector for small field dosimetry has led to the development of many new types of detectors. Recent studies have shown that plastic scintillation detectors (PSDs) provide favorable dosimetric characteristics, such as minimal volume averaging and fluence perturbation effects, real time response rates, high signal to
Baradaran-Ghahfarokhi M, Grees B, Cooney A, Northern E, Ding G, Luo G, Homann K.   +6 more
europepmc   +2 more sources

Design and evaluation of structural shielding of a typical radiotherapy facility using egsnrc monte carlo code

Journal of Medical Physics, 2022
Purpose: This study aimed to evaluate the shielding integrity of a typical radiotherapy facility using the Monte Carlo (MC) method. Materials and Methods: EGSnrc MC code was used to design a radiotherapy bunker with appropriate materials and thicknesses.
Zaccheaus Ayo Ibitoye, Margret Bose Adedokun, Temitope Aminat Orotoye, Godwin Bassey Udo   +3 more
doaj   +1 more source

Evaluation of the TG-43 formalism for intraoperative radiotherapy dosimetry in glioblastoma treatment. [PDF]

Med Phys
Abstract Background Intraoperative radiation therapy (IORT) using the INTRABEAM system has shown promise in glioblastoma treatment. However, accurate dosimetry remains challenging due to the low‐energy photons used and the heterogeneity of tissues in the brain. Current clinical practice relies on the TARGIT method, but more robust approaches, including
Ayala Alvarez DS, Watson PGF, Popovic M, Heng VJ, Evans MDC, Panet-Raymond V, Seuntjens J.   +6 more
europepmc   +2 more sources

EGSnrc/BEAMnrc-Based Monte Carlo Simulation of the Gamma Knife 4C versus MCNP Code in Homogeneous Media

Frontiers in Biomedical Technologies, 2020
Purpose: Gamma Knife is applied as a superseded tool for inaccessible lesions surgery delivering a single high dose to a well-defined target through 201 small beams. Monte Carlo simulations can be an appropriate supplementary tool to determine dosimetric
Atefeh Mahmoudi, Ghazale Geraily
doaj   +1 more source

Semi-classical Monte Carlo algorithm for the simulation of X-ray grating interferometry

Scientific Reports, 2022
Traditional simulation techniques such as wave optics methods and Monte Carlo (MC) particle transport cannot model both interference and inelastic scattering phenomena within one framework.
Stefan Tessarini, Michael Karl Fix, Peter Manser, Werner Volken, Daniel Frei, Lorenzo Mercolli, Marco Stampanoni   +6 more
doaj   +1 more source

Estimation of dose distribution in occupationally exposed individuals to FDG-18F

Brazilian Journal of Radiation Sciences, 2015
The use of unsealed radiation sources in nuclear medicine can lead to important incorporation of radionuclides, especially for occupationally exposed individuals (OEIs) during production and handling of radiopharmaceuticals.
Isabelle Viviane Batista de Lacerda, Manuela Ohana Monteiro Cabral, José Wilson Vieira, Mercia Liane Oliveira, Fernando Roberto de Andrade Lima   +4 more
doaj   +1 more source

DESENVOLVIMENTO DE ALGORITMOS SIMULADORES DE FONTES RADIOATIVAS PLANARES PARA USO EM MODELOS COMPUTACIONAIS DE EXPOSIÇÃO

Brazilian Journal of Radiation Sciences, 2013
Algumas das irradiações a que o homem é submetido podem ser modeladas por um fantoma de voxels acoplado a um código Monte Carlo (MC) que simule o transporte da radiação pelos órgãos e tecidos do fantoma, a interação desta com os átomos constituintes do ...
José Wilson Vieira, Viriato Leal Neto, José de Melo Lima Filho, Fernando Roberto de Andrade Lima   +3 more
doaj   +1 more source

Comparison of MCNPX and EGSnrc Monte Carlo Codes in the Calculation of Nano-Scaled Absorbed Doses and Secondary Electron Spectra around Clinically Relevant Nanoparticles

Frontiers in Biomedical Technologies, 2023
Purpose: Absorbed dose enhancement due to the presence of high atomic number nanoparticles (NP)s has been estimated and modeled by Monte Carlo (MC) simulation methods.
Asghar Mesbahi, Mostafa Robatjazi, Hamid Reza Baghani, Elham Mansouri, Mohammad Mohammadi   +4 more
doaj   +1 more source

Charged particle transport in magnetic fields in EGSnrc

Medical Physics, 2016
Purpose:To accurately and efficiently implement charged particle transport in a magnetic field in EGSnrc and validate the code for the use in phantom and ion chamber simulations.Methods:The effect of the magnetic field on the particle motion and position is determined using one‐ and three‐point numerical integrations of the Lorentz force on the charged
V N, Malkov, D W O, Rogers
openaire   +2 more sources

Validação dosímetrica de trabéculas ósseas sintéticas geradas por método Monte Carlo paramétrico

Brazilian Journal of Radiation Sciences, 2018
Um dos maiores desafios da dosimetria numérica é estimar a dose de radiação ionizante absorvida pelos tecidos moles que se localizam nas trabéculas ósseas. Em função da dificuldade na obtenção de imagens micro-CT de amostras de ossos reais (OR), surgiu a
Fernanda Gonçalves Oliveira, Arthur Andrade, José Vieira, Alex Oliveira, Fernando Lima   +4 more
doaj   +1 more source