Results 11 to 20 of about 2,681 (192)

Design and evaluation of structural shielding of a typical radiotherapy facility using egsnrc monte carlo code

Journal of Medical Physics, 2022
Purpose: This study aimed to evaluate the shielding integrity of a typical radiotherapy facility using the Monte Carlo (MC) method. Materials and Methods: EGSnrc MC code was used to design a radiotherapy bunker with appropriate materials and thicknesses.
Zaccheaus Ayo Ibitoye, Margret Bose Adedokun, Temitope Aminat Orotoye, Godwin Bassey Udo   +3 more
doaj   +3 more sources

An Efficiency Studying of an Ion Chamber Simulation Using Vriance Reduction Techniques with EGSnrc [PDF]

Journal of Biomedical Physics and Engineering, 2019
Background: Radiotherapy is an important technique of cancer treatment using ionizing radiation. The determination of total dose in reference conditions is an important contribution to uncertainty that could achieve 2%.
Campos L. T., Magalhães L. A., de Almeida C. E. V.   +2 more
doaj   +3 more sources

Evaluation of extrapolation chamber response for surface and buildup dose assessment in radiotherapy photon beams using Monte Carlo simulations. [PDF]

Med Phys
Abstract Background Surface dose assessment is essential in radiotherapy, but accurately measuring doses in the buildup region of megavoltage beams presents significant challenges. Extrapolation chambers are frequently regarded as the most suitable detectors for this purpose. Purpose To establish under what conditions extrapolation chambers can be used
Reis CQM, Muir BR, Nicolucci P, Rogers DWO.   +3 more
europepmc   +2 more sources

Generation of 3D reference dosimetric datasets towards adoption of model-based dose calculations for permanent implant prostate brachytherapy. [PDF]

Med Phys
Abstract Purpose This work aims to create and validate a comprehensive set of test cases and 3D reference dosimetric datasets for model‐based dose calculation algorithms (MBDCAs) in permanent implant prostate brachytherapy. These test cases address the limits of the standard TG‐43 formalism towards improving dose evaluations in prostate cancer ...
Akbari F, Peppa V, Ouellet S, Moghadam N, Oliver S, Gimenez-Alventosa V, Beaulieu L, Vijande J, Thomson RM.   +8 more
europepmc   +2 more sources

Detector response and dose calculation lateral to material interfaces for 6 MV photon beam. [PDF]

J Appl Clin Med Phys
Abstract Background Dose calculation around inhomogeneities is challenging for many algorithms. A validation of dose distributions in these conditions is not straightforward, as detector response close to material interfaces is affected by the non‐equilibrium situation, the changing energy spectrum and the volume effect in a steep dose gradient ...
Ringholz J, Sauer OA, Wegener S.
europepmc   +2 more sources

A Comparison between Electron Gamma Shower, National Research Council/Easy Particle Propagation (EGSnrc/Epp) and Monte Carlo N-Particle Transport Code (MCNP) in Simulation of the INTRABEAM ® System with Spherical Applicators [PDF]

Journal of Biomedical Physics and Engineering, 2021
Background: Online Monte Carlo (MC) treatment planning is very crucial to increase the precision of intraoperative radiotherapy (IORT). However, the performance of MC methods depends on the geometries and energies used for the problem under study ...
E M Tegaw, Gh Geraily, S M Etesami, S Gholami, H Ghanbari, M Farzin, G F Tadesse, M Shojaei   +7 more
doaj   +1 more source

A Monte Carlo approach to optimising a primary collimator design using EGSnrc

Physics Open
The primary collimator in a clinical linear accelerator (linac) plays a vital role in the radiation shielding of the machine. One objective of the collimation system is to reduce head leakage to less than 0.1 % relative to the dose on the central axis of
Anthony Criscuolo, Tracy Underwood, Rebecca Nutbrown, David Shipley, Russell Thomas, Patrick H. Regan, Michael W. Kissick   +6 more
doaj   +2 more sources

Clinical performance of a shielded diode for small field relative dosimetry in a 1.5 T MRI-linac using measurements and simulations. [PDF]

Med Phys
Abstract Background Small field dosimetry on magnetic‐resonance (MR) guided linear accelerators (linacs) has become increasingly more important for accurate beam modeling due to the increase in the number of patients and variety of disease sites treated on MR‐linacs such as those with small fields.
Ferris WS, Czarnecki D, St-Aubin JJ, Hyer DE.   +3 more
europepmc   +2 more sources

Reference datasets for commissioning of model-based dose calculation algorithms for electronic brachytherapy. [PDF]

Med Phys
Abstract Purpose This work provides the first two clinical test cases for commissioning electronic brachytherapy (eBT) model‐based dose calculation algorithms (MBDCAs) for skin irradiation using surface applicators. Acquisition and Validation Methods The test cases utilize the INTRABEAM 30 mm surface applicator.
Mansour IR, Valdes-Cortez C, Ayala Alvarez DS, Berumen F, Côte JS, Ndoutoume-Paquet G, Watson PGF, Seuntjens J, Ballester F, Mainegra-Hing E, Thomson RM, Beaulieu L, Vijande J.   +12 more
europepmc   +2 more sources

Commissioning and validation of the Elekta One GPUMCD algorithm for an Elekta VersaHD linear accelerator. [PDF]

J Appl Clin Med Phys
Abstract Purpose The purpose of this work was to commission and validate GPUMCD, a GPU‐accelerated Monte Carlo dose calculation engine for c‐arm Elekta linear accelerators (linac). This algorithm was recently released for clinical implementation in the Elekta One Treatment Planning System (v6.2.3, EOP). Methods A GPUMCD beam model was generated for all
Rusu SD, Smith BR, Hutchinson GH, Jen JH, Hyer DE.   +4 more
europepmc   +2 more sources