Results 71 to 80 of about 1,765 (182)
Journal of Medical Physics, 2018 Purpose: A Monte Carlo model of a 6 MV medical linear accelerator (linac) unit built indigenously was developed using the BEAMnrc user code of the EGSnrc code system. The model was benchmarked against the measurements.
Subhalaxmi Mishra +4 more
doaj +1 more source
Construção de um catálogo de espectros de raios X para simulações em mamografia
Brazilian Journal of Radiation Sciences, 2018 Modelos Computacionais de Exposição (MCEs) utilizam técnicas Monte Carlo (MC) para simular a interação da radiação com a matéria. Um MCE é constituído, basicamente por um fantoma (geometria a ser irradiada), algoritmos simuladores de fontes radioativas e
Larissa Cristina Silva dos Santos +2 more
doaj +1 more source
Image Analysis Metrics in Evaluation of Generative Adversarial Network (GAN) Models Performance in Prediction of 177Lu Dose Voxel Kernels [PDF]
Iranian Journal of Medical PhysicsIntroduction: In Generative Adversarial Networks (GANs), validation datasets are typically excluded from the adversarial optimization loop, unlike in many conventional machine learning architectures.
KAPIS OTIENO +3 more
doaj +1 more source
The Journal of Engineering, 2019 The Monte–Carlo (MC) program EGSnrc was used to establish the model of low-energy radiation field and low-energy free air ionisation chamber. The electron loss correction factor and the fluorescence scattering correction factor of the molybdenum-filtered
Ji Wang +4 more
doaj +1 more source
Journal of Applied Clinical Medical Physics, Volume 27, Issue 1, January 2026.Abstract Background O‐ring linac systems improve radiotherapy efficiency but require rigorous pretreatment verification due to increased delivery uncertainty in IMRT/VMAT. Existing methods face limitations: measurement‐based approaches incur setup errors, while calculation‐based methods (e.g., Monte Carlo) need machine‐specific validation per AAPM TG ...
Xiangyin Meng +9 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
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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 +4 more
wiley +1 more source
An Intercomparison Exercise Between EGSnrc and MCNPX for Validation of New egs kerma User Code
, 2023 Background: The “Case 1” exercise described in the TG report 195 of the American Association of Physicists inMedicine was used. This exercise aims to verify the material attenuation of a filter of aluminum and the half andquarter-value layer calculations.
Ferreira, C.V.G. +4 more
core
Application of variance reduction techniques in EGSnrc based Monte-Carlo method
Science and Technology Development Journal, 2019 Introduction: Monte Carlo (MC) is considered to be the most accurate method to calculate dose distribution in radiation therapy. However, the limitation of MC simulations is the long calculation time to reach the desired statistical uncertainty in the dose calculation as well as in clinical practice.
Loan Thi Hong Truong +3 more
openaire +2 more sources
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 +3 more
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