Results 31 to 40 of about 25,468 (231)
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
Disruption of Vitamin D and Calcium Signaling in Keratinocytes Predisposes to Skin Cancer. [PDF]
, 2016 1,25 dihydroxyvitamin D (1,25(OH)2D), the active metabolite of vitamin D, and calcium regulate epidermal differentiation. 1,25(OH)2D exerts its effects through the vitamin D receptor (VDR), a transcription factor in the nuclear hormone receptor family ...
Bikle, Daniel D +4 more
core +2 more sources
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
An EPID-based method for comprehensive verification of gantry, EPID and the MLC carriage positional accuracy in Varian linacs during arc treatments [PDF]
, 2014 BACKGROUND: In modern radiotherapy, it is crucial to monitor the performance of all linac components including gantry, collimation system and electronic portal imaging device (EPID) during arc deliveries.
Barnes, Michael P +4 more
core +1 more source
Journal of Applied Clinical Medical Physics, 2021 The use of trajectory log files for routine patient quality assurance is gaining acceptance. Such use requires the validation of the trajectory log itself.
S. Lim +4 more
semanticscholar +1 more source
Commissioning and Evaluation of an Electronic Portal Imaging Device-Based In-Vivo Dosimetry Software. [PDF]
, 2018 This study reports on our experience with the in-vivo dose verification software, EPIgray® (DOSIsoft, Cachan, France). After the initial commissioning process, clinical experiments on phantom treatments were evaluated to assess the level of accuracy of ...
Cheung, Joey +4 more
core +2 more sources
A Validation Method for EPID In Vivo Dosimetry Algorithms
Applied Sciences, 2021 The aim of this study was to develop and apply an evaluation method for assessing the accuracy of a novel 3D EPID back-projection algorithm for in vivo dosimetry. The novel algorithm of Dosimetry Check (DC) 5.8 was evaluated. A slab phantom homogeneously
M. Esposito +5 more
semanticscholar +1 more source
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
Case notes and clinicians : Galen's commentary on the Hippocratic epidemics in the Arabic tradition [PDF]
, 2008 Galen’s Commentaries on the Hippocratic Epidemics constitute one of the most detailed studies of Hippocratic medicine from Antiquity. The Arabic translation of the Commentaries by Ḥunayn ibn Isḥāq (d. c. 873) is of crucial importance because it preserves
Pormann, Peter E.
core +3 more sources
Breast in vivo dosimetry by EPID
Journal of Applied Clinical Medical Physics, 2010 An electronic portal imaging device (EPID) is an effective detector for in vivo transit dosimetry. In fact, it supplies two‐dimensional information, does not require special efforts to be used during patient treatment, and can supply data in real time.
Fidanzio, Andrea +9 more
openaire +4 more sources