Results 31 to 40 of about 525 (147)
Beam collimation and filtration optimization for a novel orthovoltage radiotherapy system. [PDF]
Med PhysAbstract Background The inaccessibility of clinical linear accelerators in low‐ and middle‐income countries creates a need for low‐cost alternatives. Kilovoltage (kV) x‐ray tubes have shown promise as a source that could meet this need. However, performing radiotherapy with a kV x‐ray tube has numerous difficulties, including high skin dose, rapid dose
Clements N +4 more
europepmc +2 more sources
Simulation and measurement of spectra of reference filtered X radiation
The Journal of Engineering, 2019 The energy spectrum is one of the most effective methods to characterise the quality of reference filtered X radiations. To obtain the energy resolution, the authors choose seven sealed standard radioactive sources to carry out energy calibration for ...
Deliang Zhang +6 more
doaj +1 more source
Enhancing targeted doses: Low-energy photon lipiodol-enhanced radiotherapy (LEPERT) for liver cancer patients. [PDF]
J Appl Clin Med PhysAbstract Objectives This study proposes a novel approach, “Low‐energy photon Lipiodol‐Enhanced Radiotherapy” (LEPERT), for patients with liver cancer. Moreover, we evaluate the dose difference of the conventional treatment planning with 10 MV X‐ray beam (MV‐plan) and LEPERT.
Kawahara D.
europepmc +2 more sources
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
Momento, 2017 The goals of this work are: (1) To evaluate a plastic scintillation detector and other stereotactic dosimeters for measuring output factors, dose profiles and percent depth dose curves of small and sub-centimeter radiation fieldsand (2)
Norman H. Machado, Johans Restrepo
doaj +1 more source
Journal of Medical Physics, 2022 Purpose: This study aimed to evaluate the shielding integrity of a typical radiotherapy facility using the Monte Carlo (MC) method. Materials and Methods: EGSnrc MC code was used to design a radiotherapy bunker with appropriate materials and thicknesses.
Zaccheaus Ayo Ibitoye +3 more
doaj +1 more source
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 +4 more
doaj +1 more source
Evaluation of Thyroid Absorption Dose During Chest Imaging by Monte Carlo Simulation (DOSXYZnrc)
Armaghane Danesh Bimonthly Journal, 2021 Background & aim: Chest radiography is one of the most common X-ray imaging procedures performed worldwide. During this process, in addition to the thorax, other tissues, including the thyroid, are exposed to radiation.
F Ghahremani, Z Salehi
doaj
Monte-Carlo Modelling For Evaluation Of Two Different Calculation Algorithms
Brazilian Journal of Radiation Sciences, 2019 Modeling of linac head (VARIAN Trilogy) for 6 MeV photon beam was performed using BEAMnrc code package (BEAMnrc 2017). The DOSXYZnrc code was used to determine the percentage depth dose (PDD profiles) and beam profiles for different symmetric square ...
Baljeet Seniwal +2 more
doaj +1 more source
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 +4 more
doaj +1 more source