Results 51 to 60 of about 525 (147)

Evaluation of nanoDot optically stimulated luminescence dosimeter for cone-shaped small-field dosimetry of cyberknife stereotactic radiosurgery unit: A monte carlo simulation and dosimetric verification study

Journal of Medical Physics, 2019
Aim: The aim of this study was to investigate the adequacy of nanoDot optically stimulated luminescence (OSL) dosimeter for small field dosimetry before its in vivo applications in CyberKnife SRS unit.
Fadil Akyol, Neslihan Sarigul, Mete Yeginer, Yagiz Yedekci, Haluk Utku   +4 more
doaj   +1 more source

Field output correction factors using a scintillation detector

Medical Physics, Volume 52, Issue 6, Page 4844-4861, June 2025.
Abstract Background As small radiation fields play an ever‐increasing role in radiation therapy, accurate dosimetry of these fields becomes critical to ensure high quality dose calculation and treatment optimization. Despite the availability of several small volume dose detectors, small field dosimetry remains challenging.
Luc Gingras, Yunuen Cervantes, Frederic Beaulieu, Magali Besnier, Benjamin Coté, Simon Lambert‐Girard, Danahé LeBlanc, Yoan LeChasseur, François Therriault‐Proulx, Luc Beaulieu, Louis Archambault   +10 more
wiley   +1 more source

Evaluating the Effects of Field Size on Beam Homogeneity Coefficient in the Superficial Radiotherapy Machine Using Empirical Method and Simulation [PDF]

Iranian Journal of Medical Physics, 2012
Introduction Superficial X-ray therapy is one of the most important treatment methods in radiotherapy especially in the treatment of superficial skin lesions (Up to 300 kVp).
Hamed Babapour, Tayyeb Allahverdi Pourfallah, Ali Shabestani Monfared, Ali-Reza Shirazi   +3 more
doaj   +1 more source

Beam characterization of 10-MV photon beam from medical linear accelerator without flattening filter

Journal of Medical Physics, 2017
Aim: This work investigated the dosimetric properties of a 10-MV photon beam emitted from a medical linear accelerator (linac) with no flattening filter (FF).
Tomohiro Shimozato, Yuichi Aoyama, Takuma Matsunaga, Katsuyoshi Tabushi   +3 more
doaj   +1 more source

Dose perturbations at tissue interfaces during parallel linac‐MR treatments: The “Lateral Scatter Electron Return Effect” (LS‐ERE)

Medical Physics, Volume 51, Issue 11, Page 8506-8523, November 2024.
Abstract Background Magnetic resonance (MR) imaging devices have been integrated with medical linear accelerators (linac) in radiation therapy. Both perpendicular linac‐MR (LMR‐B⊥) and parallel (LMR‐B∥) systems exist, where due to the MR's magnetic field dose can be perturbed in the patient.
Stephen Steciw, B. Gino Fallone, Eugene Yip   +2 more
wiley   +1 more source

Investigation of Reduction of the Uncertainty of Monte Carlo Dose Calculations in Oncor® Clinical Linear Accelerator Simulation Using the DBS Variance Reduction Technique in Monte Carlo Code BEAMnrc

Majallah-i Dānishgāh-i ’Ulūm-i Pizishkī-i Shahīd Ṣadūqī Yazd, 2017
Purpose: To study the benefits of Directional Bremsstrahlung Splitting (DBS) dose variance reduction technique in BEAMnrc Monte Carlo (MC) code for Oncor® linac at 6MV and 18MV energies. Materials and Method: A MC model of Oncor® linac was built
Amin Asadi, Abolfazl Nickfarjam, Keyvan Jabari   +2 more
doaj  

Spectrum Analysis With Monte Cralo Simulation, Beamnrc, For Low Energy X-Ray

, 2011
{"references": ["C, Muirhead , D,L,Preston.- Radiation protection 125 Low dose\nionizing radiation and cancer risk-, European commission , Nov 2000", "Ionization Radiation Fact book, United States Environmental Protection\nAgency, March 2007", "Rogers, D.W.O., Walters, B., 1995. BEAMnrc users manual.
Z. Salehi Dehyagani, A. L. Yusoff
openaire   +2 more sources

Effect of modulation factor and low dose threshold level on gamma pass rates of single isocenter multi‐target SRT treatment plans

Journal of Applied Clinical Medical Physics, Volume 25, Issue 9, September 2024.
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 ...
Elena Timakova, Sergei F. Zavgorodni
wiley   +1 more source

Monte Carlo calculated CT numbers for improved heavy ion treatment planning

Nukleonika, 2014
Better knowledge of CT number values and their uncertainties can be applied to improve heavy ion treatment planning. We developed a novel method to calculate CT numbers for a computed tomography (CT) scanner using the Monte Carlo (MC) code, BEAMnrc ...
Qamhiyeh Sima, Wysocka-Rabin Anna, Jäkel Oliver   +2 more
doaj   +1 more source

Four-dimensional dosimetry validation and study in lung radiotherapy using deformable image registration and Monte Carlo techniques

Radiation Oncology, 2010
Thoracic cancer treatment presents dosimetric difficulties due to respiratory motion and lung inhomogeneity. Monte Carlo and deformable image registration techniques have been proposed to be used in four-dimensional (4D) dose calculations to overcome the
Dilling Thomas, Liang Ji-An, Huang Tzung-Chi, Wu Tung-Hsin, Zhang Geoffrey   +4 more
doaj   +1 more source