Results 21 to 30 of about 25,468 (231)

EPID-based in vivo dosimetry – new developments and applications

Journal of Physics: Conference Series, 2023
In vivo dosimetry has been shown to be a powerful quality assurance method in modern radiation therapy. The most common tool used for in vivo dosimetry is the electronic portal imaging device (EPID) which can quantitatively image the therapeutic beam ...
B. McCurdy
semanticscholar   +1 more source

In-vivo quality assurance of dynamic tumor tracking (DTT) for liver SABR using EPID images.

Journal of Applied Clinical Medical Physics, 2023
PURPOSE To assess dynamic tumor tracking (DTT) target localization uncertainty for in-vivo marker-based stereotactic ablative radiotherapy (SABR) treatments of the liver using electronic-portal-imaging-device (EPID) images.
Rostamzadeh Maryam, Luchka Kurt, Ma Roy, L. Mitchell, Dunne Emma, Camborde Marie-Laure, Karan Tania, Mestrovic Ante, Bergman Alanah   +8 more
semanticscholar   +1 more source

Verification of IMRT and RapidArc Localized Prostate Cancer Treatment Plans Using EPID and Delta4 in vivo Dosimetry Methods [PDF]

Middle East Journal of Cancer, 2021
Background: Quality assurance for intensity modulated radiation therapy (IMRT) depends on the type of dosimetry system and its evaluation procedure. We can check both the intensity and distribution of each field as the required pretreatment verification ...
Moustafa Ahmed, Naer Baker, Khaled El-Shahat, Mohamed Akl, Ahmed Shawata   +4 more
doaj   +1 more source

Manejo de las enfermedades pulmonares intersticiales difusas (EPID) asociadas a enfermedades autoinmunes, por el neumólogo en las diferentes unidades de EPID en España

Open Respiratory Archives, 2022
Resumen: Introducción: El objetivo del estudio fue conocer el manejo de los pacientes con enfermedad pulmonar intersticial difusa (EPID) asociada a enfermedades autoinmunes sistémicas (EAS) en las consultas de neumología especializadas en EPID en el ...
Orlando Acosta Fernández, Myriam Aburto Barrenetxea, Ana Belén Llanos González, María Jesús Rodríguez Nieto, María Molina Molina, Claudia Valenzuela   +5 more
doaj   +1 more source

Evaluation of an EPID in vivo monitoring system using local and external independent audit measurements

Journal of Applied Clinical Medical Physics, 2022
Purpose The aim of this work was to evaluate the SunCHECK PerFRACTION, the software for in vivo monitoring using EPID images. Materials/Methods First, the PerFRACTION ability to detect errors was investigated simulating two situations: (1) variation of ...
Samuel Ramalho Avelino, J. R. Dias, T. M. Peron, G. Vidal   +3 more
semanticscholar   +1 more source

An Empirical Transmitted EPID Dosimetry Method using a Back-Projection Algorithm [PDF]

Journal of Biomedical Physics and Engineering, 2019
Background: The present study aimed to introduce a rapid transmission dosimetry through an electronic portal-imaging device (EPID) to achieve two-dimensional (2D) dose distribution for homogenous environments. Material and Methods: In this Phantom study,
S M Hashemi, M H Bahreyni, M Mohammadi, S Nasseri, S Bayani, H Gholamhosseinian, R Salek, F Shahedi, M Momennezhad   +8 more
doaj   +1 more source

Intrinsic detector sensitivity analysis as a tool to characterize ArcCHECK and EPID sensitivity to variations in delivery for lung SBRT VMAT plans

Journal of Applied Clinical Medical Physics, 2021
Purpose To investigate intrinsic sensitivity of an electronic portal imaging device (EPID) and the ArcCHECK detector and to use this in assessing their performance in detecting delivery variations for lung SBRT VMAT.
T. Alharthi, P. Vial, L. Holloway, D. Thwaites   +3 more
semanticscholar   +1 more source

Evaluation of IGRT-Induced Imaging Doses and Secondary Cancer Risk for SBRT Early Lung Cancer Patients In Silico Study

Technology in Cancer Research & Treatment, 2021
Objectives: This study performed dosimetry studies and secondary cancer risk assessments on using electronic portal imaging device (EPID) and cone beam computed tomography (CBCT) as image guided tools for the early lung cancer patients treated with SBRT.
Yan-Hua Duan ME, Heng-Le Gu MS, Xiao-Hui Yang BS, Hua Chen ME, Hao Wang MS, Yan Shao MS, Xiao-Yang Li MD, Ai-Hui Feng MS, Yan-Chen Ying MS, Xiao-Long Fu PhD, Kui Ma, Tao Zhou, Zhi-Yong Xu PhD   +12 more
doaj   +1 more source

Importance of beam-matching between truebeam stx and novalis tx in pre-treatment quality assurance using portal dosimetry

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, Daniel Venencia   +1 more
doaj   +1 more source

Analysis of EPID Transmission Fluence Maps Using Machine Learning Models and CNN for Identifying Position Errors in the Treatment of GO Patients

Frontiers in Oncology, 2021
Purpose To find a suitable method for analyzing electronic portal imaging device (EPID) transmission fluence maps for the identification of position errors in the in vivo dose monitoring of patients with Graves’ ophthalmopathy (GO).
Guyu Dai, Xiangbin Zhang, Wenjie Liu, Zhibin Li, Guangyu Wang, Yaxin Liu, Qing Xiao, Lian Duan, Jing Li, Xinyu Song, Guangjun Li, S. Bai   +11 more
semanticscholar   +1 more source