Results 31 to 40 of about 506,839 (244)

In-Air Electron Streaming Effect for Esophageal Cancer Radiotherapy With a 1.5 T Perpendicular Magnetic Field: A Treatment Planning Study

Frontiers in Oncology, 2020
PurposeTo investigate the in-air out-of-field electron streaming effect (ESE) for esophageal cancer radiotherapy in the presence of 1.5 T perpendicular magnetic field.MethodsTen esophageal cancer patients treated with conventional Linac were ...
Hongdong Liu, Shouliang Ding, Bin Wang, Yongbao Li, Ying Sun, Xiaoyan Huang   +5 more
doaj   +1 more source

Absorbed dose calculation for a realistic CT-derived mouse phantom irradiated with a standard Cs-137 cell irradiator using a Monte Carlo method.

PLoS ONE, 2023
Computed tomography (CT) derived Monte Carlo (MC) phantoms allow dose determination within small animal models that is not feasible with in-vivo dosimetry.
Amir Entezam, Andrew Fielding, David Bradley, Davide Fontanarosa   +3 more
doaj   +1 more source

Preclinical Evaluation of Dose-Volume Effects and Lung Toxicity Occurring In and Out-of-Field [PDF]

International Journal of Radiation Oncology*Biology*Physics, 2019
The aim of this study was to define the dose and dose-volume relationship of radiation-induced pulmonary toxicities occurring in and out-of-field in mouse models of early inflammatory and late fibrotic response.Early radiation-induced inflammation and fibrosis were investigated in C3H/NeJ and C57BL/6J mice, respectively. Animals were irradiated with 20 
Ghita, Mihaela, Dunne, Victoria L, McMahon, Stephen J, Osman, Sarah O, Small, Donna M, Weldon, Sinead, Taggart, Clifford C, McGarry, Conor K, Hounsell, Alan R, Graves, Edward E, Prise, Kevin M, Hanna, Gerard G, Butterworth, Karl T   +12 more
openaire   +4 more sources

Consideration of the radiation dose delivered away from the treatment field to patients in radiotherapy

Journal of Medical Physics, 2011
Radiation delivery to cancer patients for radiotherapy is invariably accompanied by unwanted radiation to other parts of the patient′s body. Traditionally, considerable effort has been made to calculate and measure the radiation dose to the target as ...
Michael L Taylor, Tomas Kron
doaj   +1 more source

Assessment of Dose Calculation Accuracy of TiGRT Treatment Planning System for Physical Wedged fields in Radiotherapy [PDF]

Iranian Journal of Medical Physics, 2016
Introduction Wedge modifiers are commonly applied in external beam radiotherapy to change the dose distribution corresponding to the body contour and to obtain a uniform dose distribution within the target volume.
Bagher Farhood, Mohammad Taghi Bahreyni Toossi, Shokouhozaman Soleymanifard   +2 more
doaj   +1 more source

Simulation and experimental verification of ambient neutron doses in a pencil beam scanning proton therapy room as a function of treatment plan parameters

Frontiers in Oncology, 2022
Out-of-field patient doses in proton therapy are dominated by neutrons. Currently, they are not taken into account by treatment planning systems. There is an increasing need to include out-of-field doses in the dose calculation, especially when treating ...
Olivier Van Hoey, Liliana Stolarczyk, Liliana Stolarczyk, Liliana Stolarczyk, Jan Lillhök, Linda Eliasson, Natalia Mojzeszek, Malgorzata Liszka, Malgorzata Liszka, Ali Alkhiat, Ali Alkhiat, Vladimir Mares, François Trompier, Sebastian Trinkl, Sebastian Trinkl, Immaculada Martínez-Rovira, Maite Romero-Expósito, Carles Domingo, Ondrej Ploc, Roger Harrison, Pawel Olko   +20 more
doaj   +1 more source

Supplemental computational phantoms to estimate out-of-field absorbed dose in photon radiotherapy [PDF]

Physics in Medicine & Biology, 2018
Abstract The purpose of this study was to develop a straightforward method of supplementing patient anatomy and estimating out-of-field absorbed dose for a cohort of pediatric radiotherapy patients with limited recorded anatomy. A cohort of nine children, aged 2–14 years, who received 3D conformal radiotherapy for low-grade localized ...
Kyle J Gallagher, Jaad Tannous, Racile Nabha, Joelle Ann Feghali, Zeina Ayoub, Wassim Jalbout, Bassem Youssef, Phillip J Taddei   +7 more
openaire   +2 more sources

Estimating Radiotherapy-Induced Secondary Cancer Risk Arising from Brain Irradiation at High Energy: A Monte Carlo Study

Frontiers in Biomedical Technologies, 2021
Background: The present study aims to determine the whole-body out-of-field photon dose equivalents of high-energy conventional radiation therapy treatment.
Soheil Elmtalab, Amir Hossein Karimi, Fardin Samadi Khoshe Mehr, Hamed Zamani, Iraj Abedi, Fakhereh Pashaei   +5 more
doaj   +1 more source

Measurement of Reference Radiation Spectrum of Isotopic Neutron Source and Analysis of Simulated Neutron Spectrum

Journal of Isotopes, 2023
The neutron reference radiation field of different components is the basic condition for the performance test of neutron shielding materials. In order to obtain an ideal neutron field for neutron protection material testing, a multi sphere energy ...
LI Ziping;TANG Zhihui;LI Da;FENG Mei;JIANG Hong;LI Duohong;ZHOU Zhibo
doaj   +1 more source

Out‐of‐field dose equivalents delivered by proton therapy of prostate cancer

Medical Physics, 2007
Measurements were performed to assess the dose equivalent outside a primary proton treatment field, using a silicon‐on‐insulator (SOI) microdosimeter. The SOI microdosimeter was placed on the surface of an anthropomorphic phantom and dose equivalents were determined as a function of lateral distance from a typical passively scattered and modulated ...
Wroe, A., Rosenfeld, Anatoly B., Schulte, R.   +2 more
openaire   +4 more sources