Sensitivity and specificity of Varian Halcyon's portal dosimetry for plan‐specific pre‐treatment QA [PDF]
Journal of Applied Clinical Medical Physics, 2023 Purpose Developed as a plan-specific pre-treatment QA tool, Varian portal dosimetry promises a fast, high-resolution, and integrated QA solution. In this study, the agreement between predicted fluence and measured cumulative portal dose was determined ...
Gary Razinskas +2 more
exaly +4 more sources
Multi-parametric Improvements in the CCD Camera-based EPID for Portal Dosimetry [PDF]
Journal of Medical Signals and Sensors, 2017 Dosimetric verification of radiation treatment has recently been extended by the introduction of electronic portal imaging devices (EPIDs). Detailed dose response specifications of EPID should be addressed prior to any dosimetric application. The present
Vahideh Nazari +6 more
doaj +3 more sources
Clinical rationale for in vivo portal dosimetry in magnetic resonance guided online adaptive radiotherapy [PDF]
Physics and Imaging in Radiation Oncology, 2022 Background and purpose: In magnetic resonance guided online adaptive radiotherapy, the patient model used for plan adaptation and dose calculation is created online under stringent time constraints.
Begoña Vivas Maiques +3 more
doaj +2 more sources
Prediction of portal dosimetry quality assurance results using log files-derived errors and machine learning techniques [PDF]
Frontiers in Oncology, 2023 ObjectiveThis work aims to use machine learning models to predict gamma passing rate of portal dosimetry quality assurance with log file derived features.
Kah Seng Lew +6 more
doaj +2 more sources
Importance of beam-matching between truebeam stx and novalis tx in pre-treatment quality assurance using portal dosimetry [PDF]
Journal of Medical Physics, 2021 Flexibility and efficiency in a radiotherapy department with different linear accelerators (linacs) can be improved if they are dosimetrically equivalent, and there is no need of plan or patient-specific quality assurance (PSQA) modification.
José Alejandro Rojas-López +1 more
doaj +2 more sources
Current Practices and Clinical Implementation of Electronic Portal Imaging Device-based Dosimetry in Indian Radiotherapy Centres: A National Survey [PDF]
Journal of Medical PhysicsPurpose: This study aims to assess the current prevalence, utilization patterns, and operational challenges of electronic portal imaging device (EPID)-based dosimetry systems in Indian radiotherapy centres. Materials and Methods: A multiple-choice survey
Raghavendra Hajare +7 more
doaj +2 more sources
Beam-axis stability during gantry rotation measured with scintillation dosimetry. [PDF]
J Appl Clin Med PhysAbstract Purpose Volumetric modulated arc therapy (VMAT) requires high mechanical precision due to continuous gantry rotation. This study aims to investigate beam‐axis stability during VMAT delivery and evaluate scintillation‐based imaging as a complementary quality assurance (QA) tool.
Ohira S +9 more
europepmc +2 more sources
Impact of Tumor Geometry on Dose Distribution and Delivery Accuracy in Multi-Target Stereotactic Radiosurgery [PDF]
Brain SciencesObjectives: This study aimed to evaluate the influence of tumor geometry on dose distribution and delivery accuracy, and to assess the impact of the Automatic Lower Dose Objective (ALDO) function on dosimetric performance.
Hsiao-Mei Fu +5 more
doaj +2 more sources
A recurrent neural network for rapid detection of delivery errors during real-time portal dosimetry [PDF]
Physics and Imaging in Radiation Oncology, 2022 James L Bedford, Ian M Hanson
exaly +2 more sources
Improving patient treatment accuracy using transit dosimetry with Electronic Portal Imaging Device images and deep learning [PDF]
Physics and Imaging in Radiation OncologyBackground and Purpose:: Electronic portal imaging devices (EPID) can be utilized for transit in vivo dosimetry (IVD). A major limitation of standard amorphous Silicon EPID detectors for usage IVD is their non-linear detector response to water equivalent
Lorenzo Marini +9 more
doaj +2 more sources