Results 21 to 30 of about 1,530,338 (157)

Assessment of the Absorbed Dose Variations in the Thyroid Gland Exposed to Orthopantomography (OPG) while Swallowing: A Novel Approach to Radiation Protection [PDF]

Journal of Biomedical Physics and Engineering
Background: The reliance on specialized diagnostic techniques is on the rise across various medical fields, including dentistry. While orthopantomogram (OPG), offers many advantages in terms of dental diagnosis, it also poses potential risks to sensitive
Hassan Vafapour, Zaker Salehi
doaj   +2 more sources

Radiation Beam Characterization and Dosimetry of Theratron Equinox-80 Telecobalt Machine Using BEAMnrc Monte Carlo Simulation Code

International Journal of Medical Physics, Clinical Engineering and Radiation Oncology, 2016
The BEAMnrc code was used for the simulation of the Theratron Equinox-80 telecobalt machine. The phase space of radiation beam was generated at treatment distance of 80 cm for various field sizes. The phase spaces in air were analyzed by BEAMdp data processing program.
Narayan Prasad Patel, Rahul Shukla, Nagappan Balasubramanian, Rajeev Atri, Anil Kumar Dhull, Hanuman Prasad Yadav, Vivek Kaushal   +6 more
exaly   +3 more sources

Feasibility study: Use of an optical scanning system to obtain 3D body surface images suitable for total skin electron therapy treatment dosimetry. [PDF]

J Appl Clin Med Phys
Abstract Background Total skin electron therapy (TSET, also known as TSE, TSI, TSEI or TSEBT) provides an effective treatment for extensive superficial lesions such as mycosis fungoides, although the standing setups and large distances used for treatment mean that comprehensive three‐dimensional (3D) dose calculations are rarely achievable clinically ...
Crowe SB, Cassim N, Luscombe J, McMahon KL, Kairn T.   +4 more
europepmc   +2 more sources

Development of a LINAC head model for the CyberKnife VSI-System using EGSnrc Monte Carlo system. [PDF]

J Appl Clin Med Phys, 2023
Abstract Introduction In order to understand the interaction processes of photons and electrons of the CyberKnife VSI‐System, a modeling of the LINAC head must take place. Here, a Monte Carlo simulation can help. By comparing the measured data with the simulation data, the agreement can be checked. Materials and methods For the Monte Carlo simulations,
Thiele M, Galonske K, Ernst I, Mack A.
europepmc   +2 more sources

Field output correction factors and perturbation factor analysis for novel SunSILICON and SunSILICON P silicon diode detectors. [PDF]

J Appl Clin Med Phys
Abstract Background Field output factor measurements of clinical linear accelerators require detector‐specific corrections, due to the introduction of fluence perturbation effects by non‐water‐equivalent components of applied detectors. Purpose This study aims to determine field output correction factors for novel shielded and unshielded silicon diode ...
Schönfeld AA, Alissa M, Towle D, Murray A, Schönfeld AB, Anders TJ, Alquist E, Evrard O, Rosenwald C, Hildreth J, Flatten V, Wessing G, Habib C, Czarnecki D.   +13 more
europepmc   +2 more sources

Monte Carlo modeling of the origin of contaminant electrons on a 0.5T bi-planar Linac-MR. [PDF]

Med Phys
Abstract Introduction In the last decade, hybrid linear accelerator magnetic resonance imaging (Linac‐MR) devices have evolved into FDA‐cleared clinical tools, facilitating magnetic resonance guided radiotherapy (MRgRT). The addition of a magnetic field to radiation therapy has previously demonstrated dosimetric and electron effects regardless of ...
Reynolds M, Oliver PAK, Wood T, Yip E, Tari SY, Wachowicz K, Burke B, Fallone BG.   +7 more
europepmc   +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

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

Radiology and mammography standard X-ray spectra simulated with the Monte Carlo method

Brazilian Journal of Radiation Sciences, 2021
Six standard beams described in the TRS-457 (IAEA): RQR 5, 8, M1, M2, M3, M4 were simulated using the EGSnrc Monte Carlo code. Each spectrum was created by an X-ray tube simulated in BEAMnrc, and attenuation curves were obtained using the application ...
Joel Marques Xavier Filho, Iury Santos Silveira, Linda Viola Ehlin Caldas   +2 more
doaj   +1 more source

Monte Carlo modeling of radiation dose from radiation therapy with superficial x-rays. [PDF]

J Appl Clin Med Phys
Abstract Introduction Superficial x‐rays (50–100 kVp) are used for treating non‐melanoma skin cancer and intraoperative radiation therapy (IORT). At these energies, the photoelectric effect significantly increases absorbed dose to bone compared to soft tissue.
Barghash R, Martin TW, Prebble AR, Leary D.   +3 more
europepmc   +2 more sources