Results 61 to 70 of about 2,643 (174)

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

Validação de um modelo computacional de acelerador linear VARIAN CLINAC 2100 utilizando o código EGSnrc para utilização em dosimetria de pequenos campos.

Brazilian Journal of Radiation Sciences, 2018
Neste trabalho foi empregado o Método de Monte Carlo para a simulação de campos clínicos de radioterapia que serão posteriormente utilizados para a calibração de pequenos campos de radiocirurgia. O código de transporte de radiação utilizado foi o EGSnrc
Reginaldo Gonçalves Leão Jr, Rômulo Verdolin Sousa, Arno Heeren Oliveira, Hugo Lemos Leonardo Silva, Arnaldo Prata Mourão   +4 more
doaj   +1 more source

Comparison and validation of multiple detectors against monte carlo simulation for the use of small-field dosimetry

Journal of Medical Physics, 2022
Aim: The aim of this study was to compare the Exradin W2 scintillator, PTW microDiamond, IBA Razor Nano, and IBA Razor chamber detectors for small-field dose measurements and validate the measured data against the EGSnrc user code and observe the ...
Nazia Parveen, Prabhakar Ramachandran, Venkatakrishnan Seshadri, Ben Perrett, Andrew Fielding   +4 more
doaj   +1 more source

Uso de Métodos Monte Carlo na Modelagem de Fontes Radioativas Naturais

Brazilian Journal of Radiation Sciences, 2015
Exist, in Brazil and in the world, different places with high levels of ambient radiation, mainly due to the presence of primordial radionuclides, exposing populations to risks that can not be neglected.
Gutemberg Luiz Sales Claudino, José Vieira, Viriato Leal Neto, Fernando Lima, José Santos   +4 more
doaj   +1 more source

A geometrical model for the Monte Carlo simulation of the TrueBeam linac [PDF]

, 2015
Monte Carlo (MC) simulation of linacs depends on the accurate geometrical description of the head. The geometry of the Varian TrueBeam (TB) linac is not available to researchers. Instead, the company distributes phase-space files (PSFs) of the flattening-
Brualla, Lorenzo, Cozzi, Luca, Fogliata, Antonella, Rodriguez, Miguel, Sauerwein, Wolfgang, Sempau, Josep   +5 more
core   +3 more sources

Simulation, visualization and dosimetric validation of scatter radiation distribution under fluoroscopy settings [PDF]

, 2015
2015-2016 > Academic research: refereed > Refereed conference paperVersion of ...
Chan, LWC, Chan, TP, Cheung, BTF, Fung, KKL, Mo, K   +4 more
core   +1 more source

Accurate,robust and harmonized implementation of morpho-functional imaging in treatment planning for personalized radiotherapy [PDF]

, 2019
In this work we present a methodology able to use harmonized PET/CT imaging in dose painting by number (DPBN) approach by means of a robust and accurate treatment planning system.
Baeza, José Antonio, Balcerzyk, Marcin, García-Gómez, Francisco Javier, Jiménez Ortega, Elisa Eugenia, Leal Plaza, Antonio, Parrado-Gallego, Ángel, Pereira Barbeiro, Ana Rita, Ureba Sánchez, Ana María, Wals-Zurita, Amadeo   +8 more
core   +2 more sources

Development of a GPU-based Monte Carlo dose calculation code for coupled electron-photon transport

, 2010
Monte Carlo simulation is the most accurate method for absorbed dose calculations in radiotherapy. Its efficiency still requires improvement for routine clinical applications, especially for online adaptive radiotherapy.
Amitava Majumdar, Bielajew A F Hirayama H Nelson W R Rogers D W O, Briesmeister J F, Dongju Choi, Gu X, Gu X, Jacques R Taylor R Wong J McNutt T, Josep Sempau, Lensch H Strzodka R, Li J S, Li M, Ma C M, Men C, Nelson W R Hirayama H Rogers D W O, NVIDIA, Salvat F Fernández-Varea J M Baró J Sempau J, Salvat F Fernández-Varea J M Sempau J, Sempau J, Sharp G C, Steve B Jiang, Woodcock E Murphy T Hemmings P Longworth S, Xu F, Xuejun Gu, Xun Jia, Yan G R   +24 more
core   +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

Comparison of measured and Monte Carlo calculated dose distributions from indigenously developed 6 MV flattening filter free medical linear accelerator

Journal of Medical Physics, 2018
Purpose: Monte Carlo simulation was carried out for a 6 MV flattening filter-free (FFF) indigenously developed linear accelerator (linac) using the BEAMnrc user-code of the EGSnrc code system. The model was benchmarked against the measurements.
Bibekananda Mishra, Subhalaxmi Mishra, T Palani Selvam, S T Chavan, S N Pethe   +4 more
doaj   +1 more source