Results 71 to 80 of about 4,636 (165)

Performance optimization of the Varian aS500 EPID system

Journal of Applied Clinical Medical Physics, 2006
Today, electronic portal imaging devices (EPIDs) are widely used as a replacement to portal films for patient position verification, but the image quality is not always optimal. The general aim of this study was to optimize the acquisition parameters of an amorphous silicon EPID commercially available for clinical use in radiation therapy with the view
Berger, Lucie, François, Pascal, Gaboriaud, Geneviève, Rosenwald, Jean‐Claude   +3 more
openaire   +2 more sources

EPIDs and QA of advanced treatments

Journal of Physics: Conference Series, 2019
Abstract In this paper I will summarize the various possibilities of EPIDs for their use as tools for QA of advanced treatments. After elucidating the choice of EPIDs for this purpose, I will review the use of EPIDs for pre-treatment and in vivo (transit) dosimetry applications.
openaire   +1 more source

Usage of PCI and long-term cardiovascular risk in post-myocardial infarction patients: a nationwide registry cohort study from Finland

BMC Cardiovascular Disorders, 2019
Background Despite currently available treatments, the burden of myocardial infarction (MI) morbidity and mortality remains prominent. The aim of this was to investigate the risk of developing subsequent cardiovascular events in MI patients. Methods This
Ville Kytö, Tuire Prami, Houssem Khanfir, Pål Hasvold, Eeva Reissell, Juhani Airaksinen   +5 more
doaj   +1 more source

Assessment of a 2D electronic portal imaging devices-based dosimetry algorithm for pretreatment and in-vivo midplane dose verification

Advanced Biomedical Research, 2016
Background: The use of electronic portal imaging devices (EPIDs) is a method for the dosimetric verification of radiotherapy plans, both pretreatment and in vivo.
Ali Jomehzadeh, Parvaneh Shokrani, Mohammad Mohammadi, Alireza Amouheidari   +3 more
doaj   +1 more source

¿Qué ha pasado con la EPID durante la pandemia? Situación actual y organización futura en Castilla-La Mancha. Reunión del grupo de EPID de la SOCAMPAR [PDF]

Revista SOCAMPAR, 2020
La complejidad de la consulta EPID conlleva que hay que hacer visitas presenciales, pero hay cabida para la telemedicina y la debemos promover. Las visitas a la consulta deben ser las mínimas y deben estar coordinadas con las pruebas para hacérselas en ...
Godoy R, Sacristán L, Fernández Francés J, Sánchez R, García A, López PC, Bellido A   +6 more
doaj  

Verifikasi Geometri dan Indeks Gamma pada Pesawat Linac Tipe Clinac CX Terintegrasi EPID di RS Universitas Andalas

Wahana Fisika: Jurnal Penelitian Fisika dan Terapannya, 2019
Telah dilakukan verifikasi geometri dan indeks gamma pada pesawat Linac tipe Clinac CX yang terintegrasi Electronic Portal Imaging Device (EPID) di Rumah Sakit Universitas Andalas. Verifikasi bertujuan untuk mengetahui kondisi pesawat Linac.
Dian Milvita, Bagus Sidik Waskito Hadi
doaj   +1 more source

Determination of EPID convolution kernels for portal imaging using carbon target bremsstrahlung

Current Directions in Biomedical Engineering, 2017
Improving the accuracy and reproducibility during patient positioning is of paramount importance. Hence, the goal of this work is to characterize the aspects of image blurring occurring during carbon target bremsstrahlung portal imaging and to assess the
Lüdeke Sascha, Wyrwoll Vanessa, Stelljes Tenzin S., Looe Hui Khee, Harder Dietrich, Poppe Björn   +5 more
doaj   +1 more source

Multi-parametric Improvements in the CCD Camera-based EPID for Portal Dosimetry

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, Seied R Mahdavi, Ahmad Mostaar, Hassan Nedaei, Mohammad A Mosleh Shirazi, Alireza Nikoofar, Golbarg Esmailie   +6 more
doaj  

Comparison of EPID portal dosimetry verification and RadCalc dose verification for VMAT treatment plans

Nowotwory
INTRODUCTION: Dosimetry verification is required before starting each treatment. The legal regulations do not clearly define one method of plan verification.
Adam Gądek, Dominika Plaza, Łukasz Sroka, Marta Reudelsdorf-Ullmann, Krzysztof Ślosarek   +4 more
doaj   +1 more source

A deep learning approach for EPID-based patient-specific quality assurance incorporating daily machine-state variations. [PDF]

Front Oncol
Pak K, Kim SW, Park K, Cho B, Kim YJ, Song SY, Jeong C, Kwak J.   +7 more
europepmc   +1 more source