Results 91 to 100 of about 4,632 (208)

Monte carlo investigation of photon beam characteristics and its variation with incident electron beam parameters for indigenous medical linear accelerator

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, P K Dixit, T Palani Selvam, Sanket S Yavalkar, D D Deshpande   +4 more
doaj   +1 more source

Automated algorithm for CBCT-based dose calculations of prostate radiotherapy with bilateral hip prostheses [PDF]

, 2016
OBJECTIVE:Cone beam CT (CBCT) images contain more scatter than a conventional CT image and therefore provide inaccurate Hounsfield units (HUs). Consequently, CBCT images cannot be used directly for radiotherapy dose calculation.
Bourland JD, ICRU, Kawrakow I, Mark A Edwards, Richard P Hugtenburg, Ryan D Lewis, Shaw CC, Susan E Barley, Turki Almatani   +8 more
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

GGR Handbook of Rock and Mineral Analysis Chapter 16 Nano‐Imaging for Advanced X‐Ray Fluorescence and Absorption Spectroscopy Applications

Geostandards and Geoanalytical Research, Volume 49, Issue 3, Page 495-533, September 2025.
Key Points Synchrotron nano‐imaging is necessary to locate elemental nanophases. Trace metal quantification requires high sensitivity nano‐XRF. Trace metal speciation relies on nano‐XANES using nano‐XRF. This chapter (Nano‐Imaging for Advanced X‐ray Fluorescence and Absorption Spectroscopy Applications) is a contribution to the Geostandards and ...
Alexandre S. Simionovici, Laurence Lemelle   +1 more
wiley   +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 Physics
Introduction: In Generative Adversarial Networks (GANs), validation datasets are typically excluded from the adversarial optimization loop, unlike in many conventional machine learning architectures.
KAPIS OTIENO, Kaniu Muchai, Giuseppe Iaccarino, Kalambuka Angeyo   +3 more
doaj   +1 more source

Positronium Portal into Hidden Sector: A new Experiment to Search for Mirror Dark Matter

, 2010
The understanding of the origin of dark matter has great importance for cosmology and particle physics. Several interesting extensions of the standard model dealing with solution of this problem motivate the concept of hidden sectors consisting of SU(3 ...
, , A Belov, A Rubbia, B. Patt, CDMS-II collaboration, CoGeNT collaboration, E.S.M. Ali, F. Caspers, H.A. Bethe, I. Kobzarev, J. Jaeckel, J. Jaeckel, J.D. Wells, J.L. Feng, L.B. Okun, L.B. Okun, L.D. Landau, M. Felcini S.N. Gninenko, M. Goodsell, M.Yu. Khlopov, P Crivelli, P. Crivelli, R. Barbieri, R. Bernabei ., R. Foot, R. Ohta ., R.B. Metcalf, S Gninenko, S.I. Blinnikov, S.I. Blinnikov, U Gendotti, U. Gendotti, Z. Chacko, Z.G. Berezhiani, Z.K. Silagadze   +35 more
core   +1 more source

Simulation of correction factor about electronic loss and fluorescence and scattering for W/MO X-rays

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, Shiwei Ren, Jinjie Wu, Siming Guo, Hongjie Li   +4 more
doaj   +1 more source

Quantitative Test of the Evolution of Geant4 Electron Backscattering Simulation

, 2016
Evolutions of Geant4 code have affected the simulation of electron backscattering with respect to previously published results. Their effects are quantified by analyzing the compatibility of the simulated electron backscattering fraction with a large ...
Basaglia, Tullio, Han, Min Cheol, Hoff, Gabriela, Kim, Chan Hyeong, Kim, Sung Hun, Pia, Maria Grazia, Saracco, Paolo   +6 more
core   +1 more source

Implementation of a Tetrahedral Mesh Phantom Geometry Library for EGSnrc

, 2022
The implementation of a general-purpose tetrahedral mesh phantom geometry library for the Monte Carlo radiation transport code EGSnrc is described. Recently, tetrahedral mesh geometries have been proposed as standard reference phantoms to advance the state of the art over rectilinear voxel phantoms.
openaire   +2 more sources

The $^8$B Neutrino Spectrum

, 2004
Knowledge of the energy spectrum of $^8$B neutrinos is an important ingredient for interpreting experiments that detect energetic neutrinos from the Sun.
A. N. Boyarkina, A. N. Boyarkina, F. C. Barker, F. C. Barker, J. P. Schiffer, K. E. Rehm, S. J. Freedman, W. T. Winter   +7 more
core   +1 more source