Results 101 to 110 of about 4,632 (208)

Microdosimetry calculations in situ for clinically relevant photon sources and their correlation with the early DNA damage response

Medical Physics, Volume 52, Issue 7, July 2025.
Abstract Background Radiobiological data suggests variations in relative biological effectiveness (RBE) between clinically used photon‐based sources. A microdosimetric formalism using Monte Carlo (MC) methods can mechanistically describe the photon RBE.
Mirta Dumančić, Jonathan Kalinowski, Victor D. Diaz‐Martinez, Joanna Li, Behnaz Behmand, Joseph M. DeCunha, Shirin A. Enger   +6 more
wiley   +1 more source

Comparative dosimetry of GammaMed Plus high-dose rate ¹⁹² Ir brachytherapy source

Journal of Medical Physics, 2010
The comparative dosimetry of GammaMed (GM) Plus high-dose rate brachytherapy source was performed by an experiment using 0.1-cc thimble ionization chamber and simulation-based study using EGSnrc code. In-water dose measurements were performed with 0.1-cc
Patel N, Majumdar B, Vijayan V
doaj  

Accuracy Evaluation of Oncentra™ TPS in HDR Brachytherapy of Nasopharynx Cancer Using EGSnrc Monte Carlo Code

Journal of Biomedical Physics and Engineering, 2015
Background: HDR brachytherapy is one of the commonest methods of nasopharyngeal cancer treatment. In this method, depending on how advanced one tumor is, 2 to 6 Gy dose as intracavitary brachytherapy is prescribed.
Hadad K, Zohrevand M, Faghihi R, , Sedighi Pashaki A   +3 more
doaj  

Determination of a beam quality conversion factor from 60Co to 192Ir

Journal of Radiation Research and Applied Sciences, 2018
Radiation dosimetry is an integral part of the radiation therapy process. The ultimate goal of radiation dosimetry is to determine the dose delivered to the tumor and to the normal tissues in a patient undergoing radiotherapy. The importance of HDR 192Ir
Luciana Tourinho Campos, Luis Alexandre Gonçalves Magalhães, Carlos Eduardo Veloso de Almeida   +2 more
doaj   +1 more source

Application of a Monte Carlo linac model in routine verifications of dose calculations

Nucleus, 2015
The analysis of some parameters of interest in radiotherapy Medical Physics based on an experimentally validated Monte Carlo model of an Elekta Precise lineal accelerator was performed for 6 and 15 MV photon beams.
Haydee M. Linares Rosales, Elier Lara Mas, Rodolfo Alfonso Laguardia, Tony Popescu   +3 more
doaj  

Estimation of Backscatter from Internal Shielding in Electron Beam Radiotherapy Using Monte Carlo Simulations (EGSnrc) and Gafchromic Film Measurements

Journal of Medical Physics, 2019
Purpose: The purpose of the study was to estimate the backscatter electron dose in internal shielding during electron beam therapy using Monte Carlo (MC) simulations and Gafchromic film measurements.
Sukhvir Singh, M. Semwal, Chetna Bhatt
semanticscholar   +1 more source

Development of a deformable dosimetric phantom to verify dose accumulation algorithms for adaptive radiotherapy

Journal of Medical Physics, 2016
Adaptive radiotherapy may improve treatment outcomes for lung cancer patients. Because of the lack of an effective tool for quality assurance, this therapeutic modality is not yet accepted in clinic.
Hualiang Zhong, Jeffrey Adams, Carri Glide-Hurst, Hualin Zhang, Haisen Li, Indrin J Chetty   +5 more
doaj   +1 more source

Perbandingan Dosis Serap Berkas Foton 16 MV Pada Berbagai Jenis Phantom menggunakan Metode Monte Carlo - EGSnrc

Wahana Fisika: Jurnal Penelitian Fisika dan Terapannya, 2016
Telah dilakukan penelitian tentang perbandingan dosis serap berkas foton 16 MV pada berbagai jenis material phantom dengan menggunakan simulasi Monte Carlo-EGSnrc.
Ridwan Ramdani, Freddy Haryanto
doaj  

EGSnrc Monte Carlo-aided dosimetric studies of the new BEBIG 60 Co HDR brachytherapy source

Journal of Contemporary Brachytherapy, 2013
The purpose of this study is to obtain the dosimetric parameters of the new BEBIG (60)Co brachytherapy source following by TG-43U1 recommendation with appropriate electron cutoff energy (0.521 MeV).The new BEBIG (60)Co brachytherapy source is used to calculate the TG-43U1 parameters.
Anwarul, Islam Mohammad, Akramuzzaman, Mir Md., Zakaria, Golam Abu   +2 more
openaire   +2 more sources

Simulação de um acelerador LINAC 6MV para determinação da dose de profundidade e razão tecido fantoma utilizando MCNPx e EGSnrc

Brazilian Journal of Radiation Sciences, 2016
O objetivo deste trabalho é publicar os resultados obtidos de um exercício de intercomparação que envolve a modelagem e simulação de um feixe clínico de um acelerador linear de 6 MV em um campo 10x10 cm², utilizando dois diferentes códigos de Monte Carlo,
Luiz Antônio Castelo e Silva, Bruno Melo Mendes, Lucas Paixão Reis, Bruno Rodrigues Gonçalves, Daisy Mary Marchezini dos Santos, Raquel Luiza Mageste Fonseca, Madelon Aparecida Fernandes Zenóbio, Telma Cristina Ferreira Fonseca   +7 more
doaj   +1 more source