Results 31 to 40 of about 757 (155)

Monte Carlo Simulation-Based BEAMnrc Code of a 6 MV Photon Beam Produced by a Linear Accelerator (LINAC)

Atom Indonesia, 2021
In radiotherapy, high energy ionizing radiation, such as X-rays, gamma rays and electron beams,is used. The dose in the tissue is often approached with the dose in the medium of the body which is 80 % of human soft tissue.
R. Sapundani, R. Ekawati, K. M. Wibowo
doaj   +1 more source

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

Viability of the virtual cone technique using a fixed small multi‐leaf collimator field for stereotactic radiosurgery of trigeminal neuralgia

Journal of Applied Clinical Medical Physics, Volume 24, Issue 12, December 2023., 2023
Abstract Dosimetric uncertainties in very small (≤1.5 × 1.5 cm2) photon fields are remarkably higher, which undermines the validity of the virtual cone (VC) technique with a diminutive and variable MLC fields. We evaluate the accuracy and reproducibility of the VC method with a very small, fixed MLC field setting, called a fixed virtual cone (fVC), for
Taindra Neupane, Charles Shang, Maxwell Kassel, Wazir Muhammad, Theodora Leventouri, Timothy R. Williams   +5 more
wiley   +1 more source

Very high‐energy electron dose calculation using the Fermi‐Eyges theory of multiple scattering and a simplified pencil beam model

Medical Physics, Volume 50, Issue 12, Page 8009-8022, December 2023., 2023
Abstract Background Very high‐energy electrons (VHEE) radiotherapy, in the energy range of 100–200 MeV is currently considered a promising technique for the future of radiation therapy and could benefit from the promises of ultra‐high dose rate FLASH therapy.
Maria Grazia Ronga, Umberto Deut, Anthony Bonfrate, Ludovic De Marzi   +3 more
wiley   +1 more source

Electron modes simulation of a Siemens-Primus-Linac at 10, 12, and 14 MeV with various field sizes

Journal of Radiation Research and Applied Sciences, 2023
The electron mode of a Siemens Primus linear accelerator (SPLA) is simulated using Monte Carlo (MC) simulation, BEAMnrc, with various field sizes 10 × 10, 15 × 15, and 20 × 20 cm2 at different e-beam energies of 10, 12, 14 MeV.
Hani H. Negm, Walaa M. Fathy, Moamen M. Aly   +2 more
doaj   +1 more source

Exploration of Monte Carlo Simulation from a Case Study of Particle Transport in the Gamma Knife Perfexion™ Machine [PDF]

Iranian Journal of Medical Physics
Introduction: Gamma Knife Perfexion™ delivers 192 Cobalt-60 sources to the focal point (isocenter), and the patient is fixed using a stereotactic frame. In conformal techniques, the width of the penumbra resulting in an out-of-field dose of normal tissue
Junios Junios, Delsi Kariman, Irhas Irhas, Elia Soediatmoko, Dina Ediana, Rahmonalisa Rahmonalisa, Farhan Kharisma   +6 more
doaj   +1 more source

Impact of range uncertainties for intensity-modulated mixed electron-photon radiation therapy. [PDF]

Med Phys
Abstract Background In the context of mixed electron‐photon radiation therapy (MBRT), while the necessity of robust optimization to setup uncertainties is well‐established, range uncertainties have yet to be investigated. Purpose This study provides the first assessment of the impact of range uncertainties on MBRT plans.
Heng VJ, Renaud MA, Serban M, Seuntjens J.   +3 more
europepmc   +2 more sources

Evaluation of the Effects of Inhomogeneities on Dose Profiles Using Polymer Gel Dosimeter and Monte Carlo Simulation in Gamma Knife [PDF]

Iranian Journal of Medical Physics, 2012
Introduction Polymer gel dosimeters offer a practical solution to 3D dose verification for conventional radiotherapy as well as intensity-modulated and stereotactic radiotherapy.
Tayeb Allahverdi Pourfallah, Mahmoud Allahverdi, Mohammad Hasan Zahmatkesh   +2 more
doaj   +1 more source

Effect of modulation factor and low dose threshold level on gamma pass rates of single isocenter multi-target SRT treatment plans. [PDF]

J Appl Clin Med Phys
Abstract Purpose SRS MapCHECK (SMC) is a commercially available patient‐specific quality assurance (PSQA) tool for stereotactic radiosurgery (SRS) applications. This study investigates the effects of degree of modulation, location off‐axis, and low dose threshold (LDT) selection on gamma pass rates (GPRs) between SMC and treatment planning system ...
Timakova E, Zavgorodni SF.
europepmc   +2 more sources

Development of a deformable dosimetric phantom to verify dose accumulation algorithms for adaptive radiotherapy

Journal of Medical Physics, 2016
Adaptive radiotherapy may improve treatment outcomes for lung cancer patients. Because of the lack of an effective tool for quality assurance, this therapeutic modality is not yet accepted in clinic.
Hualiang Zhong, Jeffrey Adams, Carri Glide-Hurst, Hualin Zhang, Haisen Li, Indrin J Chetty   +5 more
doaj   +1 more source