Results 21 to 30 of about 2,681 (192)

Novel validation of HDR brachy therapy dosimetry for cervical cancer using egs_brachy Monte Carlo simulations: a comparative analysis with Oncentra treatment planning system. [PDF]

J Appl Clin Med Phys
Abstract Purpose This study aims to validate HDR brachytherapy dosimetry for cervical cancer patients utilizing the egs_brachy Monte Carlo (MC) simulation. Methods Three cervical cancer patients treated with 192Ir HDR brachytherapy were included. Dose distributions were calculated by the Oncentra Brachy v4 treatment planning system (TPS) based on AAPM ...
Tai DT, Thu NTA, Thanh TT, Tuan PA, Chamberland MJP, Sandwall P, Bradley D, Chow JCL.   +7 more
europepmc   +2 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, Pedro Henrique Avelino Andrade, Alex Cristóvão Holanda Oliveira, Vanildo Júnior de Melo Lima, Isabelle Viviane Batista Lacerda, Arykerne Casado Silva, Ivan Eufrázio Santana, Whoody Alem Wanderley Farias, Larissa Cristina Silva Santos, Fernanda Gonçalves Oliveira, Fernando Roberto de Andrade Lima   +10 more
doaj   +1 more source

Exposure computational models with voxel phantoms coupled to EGSnrc Monte Carlo code

Brazilian Journal of Radiation Sciences, 2023
In computational dosimetry of ionizing radiation, the energy deposited in radiosensitive organs and tissues is evaluated when an anthropomorphic simulator (phantom) is irradiated using Exposure Computational Models (ECMs).
José Wilson Vieira, Viriato Leal Neto, Pedro Henrique Avelino de Andrade, Alex Cristóvão Holanda de Oliveira, Vanildo Júnior de Melo Lima, Isabelle Viviane Batista de Lacerda, Luís Rodrigo Dandrada, Arykerne Nascimento Casado da Silva, William de Souza Santos, Ivan Eufrázio de Santana, Whoody Alem Wanderley Araripe Farias, Larissa Cristina Silva dos Santos, Fernanda Gonçalves Oliveira, Fernando Roberto de Andrade Lima   +13 more
doaj   +1 more source

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, Iury Santos Silveira, Linda Viola Ehlin Caldas   +2 more
doaj   +1 more source

The effect of algorithms on dose distribution in inhomogeneous phantom: Monaco treatment planning system versus monte carlo simulation

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, McClean, Brendan, Shields, Laura, McCavana, Patrick, Vintró, Luis León   +4 more
openaire   +2 more sources

Effect of immobilization mask and beam energy on dose coverage to small joints in treating osteoarthritis with low-dose radiation therapy. [PDF]

Med Phys
Abstract Purpose Osteoarthritis (OA) is the most common form of arthritis, affecting over 32 million Americans. Low dose radiation therapy (LDRT) is being used to treat OA, including small joints. Treatment energies recommended include both orthovoltage and 6 MV photons.
Ding GX, Homann KL, Shinohara ET.
europepmc   +2 more sources

Determination of Dose Field Distribution of 125I-103Pd Seed Source with Monte-Carlo and Experimental Method

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

The dosimetric effect of photon target degradation on C-series linear accelerators using Monte Carlo simulation. [PDF]

J Appl Clin Med Phys
Abstract Background The impact of beam dosimetry changes brought on by target degradation has not been well investigated. Purpose To determine the optimal dosimetry metrics for detecting target degradation and to investigate the impact of beam dosimetry changes brought on by target degradation. Methods The EGSnrc Monte Carlo programs were used to model
Deng Y, Qiu M, Zhong J, Xiao Z.
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