Results 31 to 40 of about 1,765 (182)
An Efficiency Studying of an Ion Chamber Simulation Using Vriance Reduction Techniques with EGSnrc [PDF]
Journal of Biomedical Physics and Engineering, 2019 Background: Radiotherapy is an important technique of cancer treatment using ionizing radiation. The determination of total dose in reference conditions is an important contribution to uncertainty that could achieve 2%.
Campos L. T. +2 more
doaj +3 more sources
Development of anthropomorphic computational phantoms at the UFPE
Brazilian Journal of Radiation Sciences, 2023 To evaluate the amount of energy deposited in radiosensitive organs and tissues of the human body, when an anthropomorphic phantom is irradiated, researchers in numerical dosimetry use the so-called exposure computational models (ECMs).
José Wilson Vieira +10 more
doaj +1 more source
Attix free-air chamber correction factors computed using EGSnrc. [PDF]
Med PhysAbstractBackgroundA cylindrical free‐air chamber, the Attix FAC, is used for absolute air‐kerma measurements of low‐energy photon beams at the University of Wisconsin Medical Radiation Research Center. Correction factors for air‐kerma measurements of specific beams were determined in the 1990s.
Stasko JT, Culberson WS.
europepmc +3 more sources
Radiology and mammography standard X-ray spectra simulated with the Monte Carlo method
Brazilian Journal of Radiation Sciences, 2021 Six standard beams described in the TRS-457 (IAEA): RQR 5, 8, M1, M2, M3, M4 were simulated using the EGSnrc Monte Carlo code. Each spectrum was created by an X-ray tube simulated in BEAMnrc, and attenuation curves were obtained using the application ...
Joel Marques Xavier Filho +2 more
doaj +1 more source
Gamma ray shielding properties of synthesized lanthanide borides using EGSnrc code [PDF]
, 2023 In this study, we have investigated some hexaborides which are synthesized for the purpose of gamma-ray shielding. These materials were synthesized by the method of magnesiothermic reduction process in the open air, and stoichiometric amounts of M2O3 ...
Aksu, Mecit +7 more
core +1 more source
Journal of Medical Physics, 2021 Background: The aim of this study is to evaluate the dose calculation algorithms commonly used in TPS by using MC simulation in the highly different inhomogeneous region and in the small fields and to provide the following uniquely new information in the
Taylan Tuğrul
doaj +1 more source
Clinical treatment planning for kilovoltage radiotherapy using EGSnrc and Python
Journal of Applied Clinical Medical Physics, 2022 AbstractKilovoltage radiotherapy dose calculations are generally performed with manual point dose calculations based on water dosimetry. Tissue heterogeneities, irregular surfaces, and introduction of lead cutouts for treatment are either not taken into account or crudely approximated in manual calculations.
Nikandrovs, Mihails +4 more
openaire +2 more sources
Journal of Isotopes, 2014 Under the same parameters, the Monte Carle codes MCNP5 and EGSnrc were used to calculate the dose field distribution. Measurements of the dose field distributions about the source were performed using LiF thermoluminescent dosimeters(GR-200) in PMMA ...
CAO Zhen1;MENG Bei-di2;ZHANG Wen-zai2;FENG Gen-sheng2;WANG Xiao-jing2
doaj +1 more source
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 +3 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 +4 more
doaj +1 more source