Results 41 to 50 of about 8,621 (193)
BMC Pulmonary Medicine, 2018 Background Exacerbations of chronic obstructive pulmonary disease (COPD) are an important measure of disease severity in terms of impaired disease progression, increased recovery time, healthcare resource utilization, overall morbidity and mortality.
Gunnar Johansson +6 more
doaj +1 more source
Contrast enhancement of EPID images via difference imaging : a feasibility study [PDF]
, 2010 In this study, the feasibility of difference imaging for improving the contrast of electronic portal imaging device (EPID) images is investigated. The difference imaging technique consists of the acquisition of two EPID images (with and without the ...
Khoei, Shadi +9 more
core +1 more source
Journal of Medical Physics, 2017 Aims: This study investigates the impact of cine acquisition mode on the dosimetric characteristics of a Varian aS500 amorphous silicon electronic portal imaging device (a-Si EPID).
Omemh Bawazeer +4 more
doaj +1 more source
Use of Amorphous Silicon (ASi) Electronic Portal Imaging Devices for Other applications for Linear Accelerator Quality Assurance [PDF]
Iranian Journal of Medical Physics, 2021 Introduction: The success of radiation therapy depends critically on the accuracy of patient alignment in treatment position day after day. The primary use for Electronic portal imaging devices (EPIDs) is to monitor patient position during daily ...
Gena Mohamed +3 more
doaj +1 more source
EPID‐based dosimetry to verify IMRT planar dose distribution for the aS1200 EPID and FFF beams [PDF]
Journal of Applied Clinical Medical Physics, 2016 We proposed to perform a basic dosimetry commissioning on a new imager system, the Varian aS1200 electronic portal imaging device (EPID) and TrueBeam 2.0 linear accelerator for flattened (FF) and flattening filter‐free (FFF) beams, then to develop an image‐based quality assurance (QA) model for verification of the system delivery accuracy for intensity‐
Miri, Narges +3 more
openaire +2 more sources
Journal of Medical Physics, 2012 The dose delivery verification for a head and neck static intensity modulated radiation therapy (IMRT) case using a scanning liquid ionization chamber electronic portal imaging device (SLIC-EPID) was investigated.
Mohammad Mohammadi, Eva Bezak
doaj +1 more source
PLoS ONE, 2019 PURPOSE:The goal of this study was to investigate the effectiveness of monitoring relevant variations during treatments for electronic portal imaging device (EPID)-based 3D in vivo verification performed using planning CTs.
Yinghui Li +4 more
doaj +1 more source
Indonesian Journal of Cancer, 2016 Radiotherapy is one of common treatment modality for Nasopharyngeal Cancer. The development of intensity modulated radiotherapy (IMRT technique) gives satisfactory results in the nasopharyngeal cancer treatment, both clinically and dosimetry.
SUSI NOFRIDIANITA
doaj +1 more source
EPID-Based Setup Error Correction in Head and Neck Radiotherapy [PDF]
Iranian Journal of Medical PhysicsIntroduction: This study introduces and evaluates a novel optimized averaging method for Electronic Portal Imaging Device (EPID)-based setup corrections, comparing it with conventional approaches.
Mohamad Pursamimi +5 more
doaj +1 more source
Comparison of electronic portal imaging device-based Winston–Lutz analysis software
South African Journal of OncologyBackground: Stereotactic radiosurgery (SRS) with a linear accelerator requires submillimetre geometric accuracy. The Winston–Lutz (WL) test verifies coincidence among radiation, mechanical, and imaging isocentres.
Hein Fourie +2 more
doaj +1 more source