Irradiation of gold nanoparticles by x-rays: Monte Carlo simulation of dose enhancements and the spatial properties of the secondary electrons production

2011 ◽  
Vol 38 (2) ◽  
pp. 624-631 ◽  
Author(s):  
Michael K. K. Leung ◽  
James C. L. Chow ◽  
B. Devika Chithrani ◽  
Martin J. G. Lee ◽  
Barbara Oms ◽  
...  
Keyword(s):  
Monte Carlo Simulation ◽  
Gold Nanoparticles ◽  
Monte Carlo ◽  
X Rays ◽  
Secondary Electrons ◽  
Spatial Properties

Monte Carlo Simulation Study on Dose Enhancement by Gold Nanoparticles in Brachytherapy

2010 ◽  
Vol 56 (6) ◽  
pp. 1754-1758 ◽  
Author(s):  
Myonggeun Yoon ◽  
Sungkoo Cho ◽  
Jong Hwi Jeong ◽  
Chan Hyeong Kim
Keyword(s):  
Monte Carlo Simulation ◽  
Gold Nanoparticles ◽  
Monte Carlo ◽  
Simulation Study ◽  
Dose Enhancement ◽  
Monte Carlo Simulation Study

An investigation of the effect of gold nanoparticles with different concentrations on increasing absorbed dose: an empirical and simulation study

2018 ◽  
Vol 18 (02) ◽  
pp. 191-197
Author(s):  
Masoumeh Hoseinnezhad ◽  
Mohammad Mahdavi ◽  
Seyyed R. M. Mahdavi ◽  
Mobarake Mahdavizade
Keyword(s):  
Monte Carlo Simulation ◽  
Gold Nanoparticles ◽  
Monte Carlo ◽  
Absorbed Dose ◽  
Simulation Method ◽  
Dose Enhancement ◽  
Depth Dose ◽  
Optical Ct ◽  
Ct System ◽  
Monte Carlo Simulation Model

AbstractPurposeThe purpose of this study was to determine the dose enhancement factor (DEF) of gold nanoparticles in a dosimeter gel and construct percentage depth dose curves, using the Optical CT system and the Monte Carlo simulation model, to determine the effect of increasing the dose caused by increasing the concentration of gold nanoparticles at depths in the gel.Materials and methodsThe Magic-f Gel was made based on the relevant protocol in the physics lab. To determine the amount of the increase in the absorbed dose, the gold nanoparticles were added to the gel and irradiated. An increase in the dose after adding nanoparticles to the gel vials was estimated both with the Optical CT system and by the Monte Carlo simulation method.ResultsDose enhancement curves for doses of 2, 4 and 6 Gy were prepared for gel vials without adding nanoparticles, and nanoparticle gels at concentrations 0·17, 3 and 6 mM. Also, the DEF was estimated. For the 0·17 mM molar gel, the DEF for 2, 4 and 6 Gy was 0·7, 0·743 and 0·801, respectively. For the 3 mM gel, it was 1·98, 2·5 and 2·2, and for the 6 mM gel, it was 37·4, 4·24 and 4·71, respectively.ConclusionThe enhancement of the dose after adding gold nanoparticles was confirmed both by experimental data and by simulation data.

Monte Carlo Simulation of Self-Absorption Effects in Elemental XRF Analysis of Atmospheric Particulates Collected on Filters

1975 ◽  
Vol 19 ◽  
pp. 323-337 ◽  
Author(s):  
A. R. Hawthorne ◽  
R. P. Gardner ◽  
T. G. Dzubay
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Size Range ◽  
Thick Layer ◽  
Thin Layers ◽  
Analytical Models ◽  
Enhancement Effect ◽  
X Rays ◽  
Atmospheric Particulates ◽  
Cylinders And Spheres

Monte Carlo simulation is used to determine the effects of selfabsorption for the low energy X-rays of light elements in the size range front 1 to 20 μm. Calculations are performed for a wide angle Fe-55 radioisotope-excited energy dispersive XRF system. Results are obtained for sulfur attenuation in thin layers, long cylinders, and spheres composed of various matrix materials. The enhancement effect is also treated for the transition region between thin and thick layer samples as well as in spheres of various sizes. Results are also comrpared to fixed angle analytical models.

Monte Carlo Simulation of Generations of Continuous and Characteristic X-Rays by Electron Impact

2000 ◽  
Vol 39 (Part 1, No. 5A) ◽  
pp. 2863-2864 ◽  
Author(s):  
Kentaro Fujii ◽  
Takaharu Nagatomi ◽  
Yoshihide Kimura ◽  
Yoshizo Takai ◽  
Ryuichi Shimizu ◽  
...  
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Electron Impact ◽  
X Rays
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