Results 21 to 30 of about 313,243 (217)

A simple model for transit dosimetry based on a water equivalent EPID

Medical Physics, 2018
PurposeThe aim of this study was to demonstrate a new model for implementing a transit dosimetry system as a means of in vivo dose verification with a water equivalent electronic portal imaging device (WE‐EPID) and a conventional treatment planning system (TPS).Method and materialsA standard amorphous silicon (a‐Si) EPID was modified to a WE‐EPID ...
Deshpande, Shrikant, Blake, Samuel J, Xing, Aitang, Metcalfe, Peter E, Holloway, Lois C, Vial, Philip J   +5 more
openaire   +4 more sources

Transit and non‐transit 3D EPID dosimetry versus detector arrays for patient specific QA [PDF]

Journal of Applied Clinical Medical Physics, 2019
AbstractPurposeDespite their availability and simplicity of use, Electronic Portal Imaging Devices (EPIDs) have not yet replaced detector arrays for patient specific QA in 3D. The purpose of this study is to perform a large scale dosimetric evaluation of transit and non‐transit EPID dosimetry against absolute dose measurements in 3D.MethodsAfter ...
Olaciregui‐Ruiz, Igor, Vivas‐Maiques, Begoña, Kaas, Jochem, Perik, Thijs, Wittkamper, Frits, Mijnheer, Ben, Mans, Anton   +6 more
openaire   +3 more sources

Evaluation of Mid-Plane Dose by Flat Panel Transit Dosimetry Method and by EBT2 Film Incident Dosimetry

International Journal of Medical Physics, Clinical Engineering and Radiation Oncology, 2015
Purpose: The aim of this study is to validate an easily applicable flat panel dosimetry method based on the back projection approach and to compare this method with the incident dosimetry by EBT2 film method for mid-plane dose calculations. Methods: The dosimetric characteristics of the flat panel were determined for 6 MV photon energy.
Kalliopi Mandourari, Christos Antypas, Christina Armpilia, Ioannis Floros, Pantelis Karaiskos, Panagiotis Sandilos   +5 more
openaire   +3 more sources

Review of the thermoluminescent dosimetry method for the environmental dose monitoring [PDF]

Nuclear Technology and Radiation Protection, 2021
Passive solid state dosimeters, such as thermoluminescence dosimeters, provide integrated measurement of the total dose and are widely used in environmental monitoring programs. The objective of this paper is to provide a comprehensive review on
Stanković-Petrović Jelena S., Knežević Željka I., Kržanović Nikola Lj., Majer Marija C., Živanović Miloš Z., Ciraj-Bjelac Olivera F.   +5 more
doaj   +1 more source

Transit dose measurements using alanine and diode-based dosimeters

Brazilian Journal of Radiation Sciences, 2022
The growing interest in low-dose (< 100 Gy) radiation processing applications has raised concerns about accurately measuring the absorbed dose in irradiated materials.
Josemary A. C. Gonçalves, Elisabeth S. R. Somessari, Samir L. Somessari, Carmen C. Bueno   +3 more
doaj   +1 more source

A Novel GPU-based Fast Monte Carlo Photon Dose Calculating Method for Accurate Radiotherapy Treatment Planning [PDF]

Journal of Biomedical Physics and Engineering, 2020
Background: An accurate and fast radiation dose calculations method is the main part of treatment planning for successful radiation therapy. Objective: This work aimed to create a novel GPU-based fast Monte Carlo Photon Dose Code (MCPDC) as a fast and ...
M Karbalaee, D Shahbazi-Gahrouei, M B Tavakoli   +2 more
doaj   +1 more source

Development of in-house heterogeneous thorax phantom and evaluation of pretreatment patient-specific transit dosimetry for intensity-modulated radiotherapy and volumetric modulated arc therapy plans

Journal of Cancer Research and Therapeutics, 2022
Background: Patient-specific dosimetry before patient treatment plays a crucial role in radiotherapy (RT) treatment. Absolute point dosimetry and relative dosimetry using homogeneous phantom are the regular methods which are employed for dose ...
P. Bagdare
semanticscholar   +1 more source

Extending in aqua portal dosimetry with dose inhomogeneity conversion maps for accurate patient dose reconstruction in external beam radiotherapy

Physics and Imaging in Radiation Oncology, 2022
Background and purpose: In aqua dosimetry with electronic portal imaging devices (EPIDs) allows for dosimetric treatment verification in external beam radiotherapy by comparing EPID-reconstructed dose distributions (EPID_IA) with dose distributions ...
Igor Olaciregui-Ruiz, Julia-Maria Osinga-Blaettermann, Karen Ortega-Marin, Ben Mijnheer, Anton Mans   +4 more
doaj   +1 more source

Simultaneous measurement of In vivo and transit mid-plane doses with ionization chambers in gynecological malignancy patients undergoing three-dimensional conformal radiotherapy

Journal of Medical Physics, 2020
Purpose: The aim of this study is to estimate delivered radiation doses inside planning tumor volume (PTV) using the in vivo (mid-plane dose) measurement and transit measurement methods in gynecological malignancy patients undergoing three-dimensional ...
Putha Suman Kumar, Challapalli Srinivas, B M Vadhiraja, Sourjya Banerjee, R Shreyas, P U Prakash Saxena, Ramamoorthy Ravichandran, Dilson Lobo   +7 more
doaj   +1 more source

Can the Risk of Dysphagia in Head and Neck Radiation Therapy Be Predicted by an Automated Transit Fluence Monitoring Process During Treatment? A First Comparative Study of Patient Reported Quality of Life and the Fluence-Based Decision Support Metric

Technology in Cancer Research & Treatment, 2021
Purpose/Objective(s): The additional personnel and imaging procedures required for Adaptive Radiation Therapy (ART) pose a challenge for a broad implementation.
Seng Boh Lim PhD, Nancy Lee MD, Kaveh Zakeri MD, Peter Greer PhD, Todsaporn Fuangrod PhD, Frederick Coffman PhD, Laura Cerviño PhD, D. Michael Lovelock PhD   +7 more
doaj   +1 more source