Results 41 to 50 of about 525 (147)

Monte Carlo-based analysis of the photon beam fluence with air gap thickness between Linac head exit window and patient’s skin in radiotherapy treatments [PDF]

Ядерна фізика та енергетика, 2020
Linear accelerators (Linac) are used in radiation therapy treatment and its technology improvement ensures high dosimetry quality that should be conserved for high radiotherapy efficiency.
Mohamed Bencheikh, Abdelmajid Maghnouj, Jaouad Tajmouati   +2 more
doaj   +1 more source

Dosimetric Study of Flattened Versus Unflattened Filter-Free Medical Linear Accelerator: Experimental Measurements and Monte Carlo Calculations

Quantum Beam Science
A dosimetric study compared flattened filter (FF) and unflattened filter-free (FFF) 18 MV medical linear accelerators (LINAC) using BEAMnrc Monte Carlo (MC) calculations and experimental measurements.
Mohammed Halato, Ibrahim I. Suliman, Abdelmonim Artoli, Francesco Longo, Gianrossano Giannini   +4 more
doaj   +1 more source

Evaluation of Lung Dose in Esophageal Cancer Radiotherapy Using Monte Carlo Simulation

Journal of Mazandaran University of Medical Sciences, 2020
Background and purpose: Radiation therapy make an important contribution in the control and treatment of cancers. Lungs are the main organs at risk in esophageal cancer radiotherapy.
Tayyeb Pourfallah, Mohammad Seyed Abousaeedi, Danial Seifi Makrani, Ehsan Mihandoust, Saeed Davoudian   +4 more
doaj  

Feasibility Study on Applying Radiophotoluminescent Glass Dosimeters for CyberKnife SRS Dose Verification. [PDF]

PLoS ONE, 2017
CyberKnife is one of multiple modalities for stereotactic radiosurgery (SRS). Due to the nature of CyberKnife and the characteristics of SRS, dose evaluation of the CyberKnife procedure is critical.
Shih-Ming Hsu, Chao-Hsiung Hung, Yi-Jen Liao, Hsiao-Mei Fu, Jo-Ting Tsai, Yung-Hui Huang, David Y C Huang   +6 more
doaj   +1 more source

Monte Carlo study of MLC fields for cobalt therapy machine

Journal of Medical Physics, 2014
An automated Multi-Leaf Collimator (MLC) system has been developed as add-on for the cobalt-60 teletherapy machines available in India. The goal of the present computational study is to validate the MLC design using Monte Carlo (MC) modeling.
Komanduri M Ayyangar, Roopa A Rani, Anil Kumar, A R Reddy   +3 more
doaj   +1 more source

Adapting a generic BEAMnrc model of the BrainLAB m3 micro-multileaf collimator to simulate a local collimation device [PDF]

Physics in Medicine and Biology, 2010
This work is focussed on developing a commissioning procedure so that a Monte Carlo model, which uses BEAMnrc's standard VARMLC component module, can be adapted to match a specific BrainLAB m3 micro-multileaf collimator (microMLC). A set of measurements are recommended, for use as a reference against which the model can be tested and optimized.
Kairn, Tanya, Aland, T, Franich, Rick, Johnston, P, Kakakhel, Muhammad, Kenny, John, Knight, Richard, Langton, Christian, Schlect, David, Taylor, Michael, Trapp, Jamie   +10 more
openaire   +5 more sources

Evaluation of the Effects of Inhomogeneities on Dose Profiles Using Polymer Gel Dosimeter and Monte Carlo Simulation in Gamma Knife [PDF]

Iranian Journal of Medical Physics, 2012
Introduction Polymer gel dosimeters offer a practical solution to 3D dose verification for conventional radiotherapy as well as intensity-modulated and stereotactic radiotherapy.
Tayeb Allahverdi Pourfallah, Mahmoud Allahverdi, Mohammad Hasan Zahmatkesh   +2 more
doaj   +1 more source

VALIDATION OF A BEAMNRC MONTE CARLO SIMULATION OF A BROAD BEAM DIAGNOSTIC X-RAY UNIT

Radiation Protection Dosimetry, 2019
A BEAMnrc Monte Carlo simulation of a diagnostic X-ray unit in a broad beam geometry intended for the derivation of effective linear attenuation coefficients was validated against measurements made on the X-ray unit on which the simulation was based.
Mark Worrall, David G Sutton
openaire   +3 more sources

A portable graphite calorimeter for onsite reference dosimetry and beam quality correction factor determination

Journal of Applied Clinical Medical Physics, Volume 26, Issue 12, December 2025.
Abstract Purpose To present a portable, reliable, and fast setup graphite calorimeter for onsite absolute dose measurements at hospitals. Methods We have designed and built a portable graphite calorimeter optimized for fast setup and accurate measurements at clinical centers. Our system has minimum readout and auxiliary electronics and is inserted in a
Nicolás Gómez‐Fernández, Jorge Deus‐Abreu, David Maughan, Faustino Gómez, Diego M. González‐Castaño   +4 more
wiley   +1 more source

Evaluation of electron Monte Carlo algorithm accuracy for dose calculations in extended source‐to‐surface distances electron beam therapy

Journal of Applied Clinical Medical Physics, Volume 26, Issue 9, September 2025.
Abstract Background Extending the source‐to‐surface distance (SSD) is an effective approach to cover a large irradiation area in electron beam therapy for large planning target volumes (PTVs). However, the accuracy of dose calculations at extended SSDs has not been fully validated.
Naohito Ono, Makoto Omiya, Manami Sugiyama, Masaki Oshima   +3 more
wiley   +1 more source