Results 151 to 160 of about 2,681 (192)

The impact of sinusitis on dose distribution in a radiotherapy plan by in silico study. [PDF]

Saudi Med J
Alzahrani HM.
europepmc   +1 more source

On the robustness of detective quantum efficiency within the limits of IEC 61267 RQA standard radiation qualities. [PDF]

Radiat Prot Dosimetry
Pojtinger S.
europepmc   +1 more source

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EGSnrc calculation of activity calibration factors for the Vinten ionization chamber

Applied Radiation and Isotopes, 2018
The National Physical Laboratory Vinten 671 chamber was selected as a proving ground for a new radionuclide source model in the EGSnrc software. The computational Vinten model is validated against measurements of radionuclide artifacts whose activities were determined by absolute methods.
Frederic Tessier
exaly   +4 more sources

EGSnrc Monte Carlo calculated dosimetry parameters for and brachytherapy sources

Medical Physics, 2008
This study presents the results of EGSnrc Monte Carlo calculations of the dose distribution surrounding a high dose rate brachytherapy source and 14 high dose rate and pulsed dose rate brachytherapy sources. Energy‐weighted spectra of emitted photons, a full set of TG‐43 dosimetry parameters, along‐away dose tables, and a description of the materials
R. E. P. Taylor, D. W. O. Rogers
exaly   +2 more sources

CSnrc: correlated sampling Monte Carlo calculations using EGSnrc.

Medical physics, 2004
CSnrc, a new user-code for the EGSnrc Monte Carlo system is described. This user-code improves the efficiency when calculating ratios of doses from similar geometries. It uses a correlated sampling variance reduction technique. CSnrc is developed from an existing EGSnrc user-code CAVRZnrc and improves upon the correlated sampling algorithm used in an ...
Buckley, L. A., Kawrakow, I., Rogers, D. W.O.   +2 more
openaire   +3 more sources

Simulation of phoswich detectors using MCNPX and EGSNRC

Radiation Protection Dosimetry, 2010
The in vivo monitoring Lab at KIT uses two phoswich detectors for routine lung counting. A simplified model of one of them has been implemented in the two Monte Carlo codes EGSnrc and MCNPX. The active part of the detector consists of a crystal of NaI(Tl) and one of CsI(Tl): the energy deposited in both the crystals have been studied to consider the ...
Leone, D., Breustedt, B.
openaire   +3 more sources

Poster ‐ 18: New features in EGSnrc for photon cross sections

Medical Physics, 2016
Purpose:To implement two new features in the EGSnrc Monte Carlo system. The first is an option to account for photonuclear attenuation, which can contribute a few percent to the total cross section at the higher end of the energy range of interest to medical physics.
Ali, Elsayed, Mainegra-Hing, Ernesto, Rogers, David W.O.   +2 more
openaire   +1 more source

Optimization of dual electron multileaf collimator materials by use of EGSnrc

Radiological Physics and Technology, 2010
A dual electron multileaf collimator (eMLC) has recently been proposed and ascertained to be effective in the collimation of therapy electron beams. The EGSnrc Monte Carlo code has been used in the optimization of the dual eMLC by simulation of the Varian 2100C medical linear accelerator with the applicator completely replaced by the dual eMLC, and ...
Samuel O, Inyang, Alan C, Chamberlain
openaire   +2 more sources

The EGSnrc System, a Status Report

2001
EGSnrc [1] is a general-purpose package for the Monte Carlo simulation of coupled electron-photon transport that is based on the popular EGS4 system but incorporates a variety of improvements in the class II implementation of the condensed history technique and the modelling of the underlying physical processes.
Kawrakow, I., Rogers, D. W.O.
openaire   +3 more sources

An EGSnrc Monte Carlo‐calculated database of TG‐43 parameters

Medical Physics, 2008
Monte Carlo methods are used to calculate a complete TG‐43 dosimetry parameter data set for 27 low‐energy photon emitting brachytherapy sources (18 and 9 ). All Monte Carlo calculations are performed using the EGSnrc user‐code BrachyDose. TG‐43 dosimetry parameters, including dose rate constants, radial dose functions (with functional fitting ...
R E P, Taylor, D W O, Rogers
openaire   +2 more sources