Results 21 to 30 of about 10,962 (218)
Novel methodologies for dosimetry audits: Adapting to advanced radiotherapy techniques
Physics and Imaging in Radiation Oncology, 2018 With new radiotherapy techniques, treatment delivery is becoming more complex and accordingly, these treatment techniques require dosimetry audits to test advanced aspects of the delivery to ensure best practice and safe patient treatment.This review of ...
Marlies Pasler +3 more
doaj +1 more source
A Large Area Pixelated Silicon Array Detector for Independent Transit In Vivo Dosimetry
Applied Sciences, 2022 A large area pixelated silicon array detector named “MP987” has been developed for in vivo dosimetry. The detector was developed to overcome the non-water equivalent response of EPID (Electronic Portal Imaging Device) dosimetry systems, due to the ...
Owen J. Brace +9 more
doaj +1 more source
Comparison of log file-based and measurement-based QA for detecting MLC positional errors and evaluating dosimetric impacts of MLC defects. [PDF]
J Appl Clin Med PhysAbstract Purpose This study aimed to compare the sensitivity of log file‐based quality assurance (LF‐QA) and measurement‐based quality assurance (MB‐QA) for detecting multileaf collimator (MLC) positional errors and to evaluate the dosimetric impacts of MLC mechanical drive train defects.
Kim CH, Kang KM, Choi HS.
europepmc +2 more sources
IMRT QA using machine learning: A multi-institutional validation. [PDF]
, 2017 PurposeTo validate a machine learning approach to Virtual intensity-modulated radiation therapy (IMRT) quality assurance (QA) for accurately predicting gamma passing rates using different measurement approaches at different institutions.MethodsA Virtual ...
Chan, Maria F +5 more
core +2 more sources
Monte Carlo portal dosimetry [PDF]
Medical Physics, 2005 This project developed a solution for verifying external photon beam radiotherapy. The solution is based on a calibration chain for deriving portal dose maps from acquired portal images, and a calculation framework for predicting portal dose maps.
openaire +1 more source
Evaluation of HyperArc™ using film and portal dosimetry quality assurance
Physical and Engineering Sciences in Medicine, 2022 Abstract HyperArc™ is a stereotactic radiotherapy modality designed for targeting multiple brain metastases using a single isocenter with multiple non-coplanar arcs. The purpose of this study was to assess the efficacy of two patient specific quality assurance methods, film and the Varian Portal Dosimetry System with Varian’s HyperArc ...
Onno Kamst, Pushkar Desai
openaire +2 more sources
Investigating the electronic portal imaging device for small radiation field measurements
Journal of Medical Physics, 2017 Purpose: With the advent of state-of-the-art treatment technologies, the use of small fields has increased, and dosimetry in small fields is highly challenging.
Arpita Agarwal +5 more
doaj +1 more source
Evaluation of Daily CT for EPID-Based Transit In Vivo Dosimetry
Frontiers in Oncology, 2021 PurposeThe difference in anatomical structure and positioning between planning and treatment may lead to bias in electronic portal image device (EPID)-based in vivo dosimetry calculations. The purpose of this study was to use daily CT instead of planning
Bin Feng +20 more
doaj +1 more source
Fricke and polymer gel 2D dosimetry validation using Monte Carlo simulation [PDF]
, 2016 Complexity in modern radiotherapy treatments demands advanced dosimetry systems for quality control. These systems must have several characteristics, such as high spatial resolution, tissue equivalence, three-dimensional resolution, and dose-integrating ...
Chacón Obando, D. +12 more
core +1 more source
Radiation Oncology, 2018 Background The demand for dose verification during treatment has risen with the increasing use of intensity-modulated radiation therapy (IMRT) and volumetric modulated arc therapy (VMAT) in modern radiation therapy.
So-Yeon Park +4 more
doaj +1 more source