Results 61 to 70 of about 1,765 (182)

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

Monte Carlo modeling of the field size dependency for thin window plane‐parallel chambers in kilovoltage X‐ray reference dosimetry

Medical Physics, Volume 53, Issue 5, May 2026.
Abstract Background Clinical dosimetry for kV X‐ray radiotherapy beams requires calibrated ionization chambers. When the clinical field size differs from the field size used for chamber calibration, in‐air measurements result in a different magnitude of scatter from the detector stem or body housing affecting the sensitive volume.
Fayz Kadeer, Brendan Healy, Duncan Butler   +2 more
wiley   +1 more source

The accuracy of EGSnrc, Geant4 and PENELOPE Monte Carlo systems for the simulation of electron scatter in external beam radiotherapy

, 2009
Three widely used Monte Carlo systems were benchmarked against recently published measurements of the angular distribution of 13 MeV and 20 MeV electrons scattered from foils of different atomic numbers and thicknesses. Source and geometry were simulated
Sempau, Josep, Perl, Joseph, Faddegon, Bruce A., Urban, Laszlo, Kawrakow, Iwan, Kubyshin, Yuri   +5 more
core   +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

Feasibility study of in‐house second‐channel calibration of dual‐channel electrometers using a battery‐powered current source

Journal of Applied Clinical Medical Physics, Volume 27, Issue 3, March 2026.
Abstract Background An ionization chamber and electrometer allow measurement of the absorbed dose to water. A sensitivity comparison between electrometers is essential for quality control, and an efficient method is available to accurately measure the electrometer sensitivity coefficient without using a linear accelerator (linac).
Hayato Tsuno, Ruan Sasaki, Koji Sasaki, Kohei Nishi, Tae Ushikawa, Daisaku Goto, Yasuhiro Kawashima, Ririko Kosugi   +7 more
wiley   +1 more source

Comparison of GATE/GEANT4 with EGSnrc and MCNP for electron dose calculations at energies between 15 keV and 20 MeV

, 2011
The GATE Monte Carlo simulation platform based on the GEANT4 toolkit has come into widespread use for simulating positron emission tomography (PET) and single photon emission computed tomography (SPECT) imaging devices.
Perrot, Y., L Maigne, D Donnarieix, Maigne, L., Breton, Vincent, Donnarieix, D., Schaart, D. R., Y Perrot, D R Schaart, V Breton   +9 more
core   +1 more source

Monte Carlo Modelling of an Orthovoltage X-ray System Using Multiple Applications in EGSnrc

, 2022
Biodosimetry relies on calibration curves to convert biological damage induced by ionizing radiation to an absorbed dose. Health Canada generates these curves by irradiating biological samples with X-rays, though exposures scenarios could consist of ...
Gunasekara, Dinindu Bawantha
core   +1 more source

Quality control of radiotherapy treatment plans with electrons

Brazilian Journal of Radiation Sciences, 2019
In this work the quality of the treatment planning generated by EclipseÒ commercial treatment planning system for electron beams of energy 9 and 20 MeV was verified and their accuracy in the calculation of dose distributions for several clinical ...
Luciana Tourinho Campos, Luiz Ribeiro da Rosa, Delano Valdivino Batista, Delson Braz   +3 more
doaj   +1 more source

Simulasi teknik radiasi volumetric modulated arc therapy (VMAT) berdasarkan data Dynamic log (Dynalog) menggunakan metode Monte Carlo-EGSnrc [PDF]

, 2018
INDONESIA: Pada radioterapi modern khususnya External Beam Radiation Therapy (EBRT) menggunakan Linear Accelerator (linac) sebelum dilakukan treatment, perhitungan dosis Analytical Anisotropic Algoritm (AAA) terlebih dahulu dilakukan. Selain itu untuk
Nitasari, Arrum
core   +1 more source

A novel system for micron‐scale analysis of energy deposition and response to low‐dose radiation

Medical Physics, Volume 53, Issue 3, March 2026.
Abstract Background Micrometer‐scale evaluation of energy deposition is important for radiation protection and therapy as well as for advancing knowledge of responses to radiation in materials and biological systems. Due to the stochastic nature of radiation interactions, there is significant variation in energy deposition in micrometer‐sized targets ...
Prarthana Pasricha, Connor McNairn, Iymad R. Mansour, Kirsty Milligan, Bryan R. Muir, Jeffrey L. Andrews, Edana Cassol, Vinita Chauhan, Sanjeena Subedi, Andrew Jirasek, Sangeeta Murugkar, Rowan M. Thomson   +11 more
wiley   +1 more source