Zobrazeno 1 - 10
of 2 160
pro vyhledávání: '"Portal imaging"'
Publikováno v:
Precision Radiation Oncology, Vol 8, Iss 2, Pp 77-84 (2024)
Abstract Objective This study aimed to analyze the effect of different gantry angles on portal imaging in terms of isocenter shifts and their dosimetric impact on dose delivery. Methods Thirty patients with head and neck cancers were prospectively se
Externí odkaz:
https://doaj.org/article/425cfa2601534775be80181f602d4ac0
Publikováno v:
Journal of Biomedical Physics and Engineering, Vol 14, Iss 4, Pp 347-356 (2024)
Background: Electronic portal imaging devices (EPIDs) are applied to measure the dose and verify patients’ position.Objective: The present study aims to evaluate the performance of EPID for measuring dosimetric parameters in small photon fields.Mat
Externí odkaz:
https://doaj.org/article/7e4f2a59db184d6b8d2bd1706d222fdf
Publikováno v:
Zhongguo yiliao qixie zazhi, Vol 48, Iss 2, Pp 150-155 (2024)
ObjectiveA quality control (QC) system based on the electronic portal imaging device (EPID) system was used to realize the Multi-Leaf Collimator (MLC) position verification and dose verification functions on Primus and VenusX accelerators. Methods Th
Externí odkaz:
https://doaj.org/article/696b35ff308c43f2ba0b0f96a3d9d1ee
Publikováno v:
Journal of Medical Physics, Vol 48, Iss 4, Pp 350-357 (2023)
Aim: The Mobius3D software addresses limitations lacking in measurement-based methods in patient-specific quality assurance (QA). The objective of this study was to validate its dosimetric performance against conventionally used portal dose measureme
Externí odkaz:
https://doaj.org/article/caaedd6dab7c4f44beb5a3c707c93f59
Akademický článek
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Autor:
Elena N. Vasina, Natalie Kong, Peter Greer, Jose Baeza Ortega, Tomas Kron, Joanna J. Ludbrook, David Thwaites, Joerg Lehmann
Publikováno v:
Physics and Imaging in Radiation Oncology, Vol 24, Iss , Pp 1-6 (2022)
Background and purpose: Real-time treatment monitoring with the electronic portal imaging device (EPID) can conceptually provide a more accurate assessment of the quality of deep inspiration breath-hold (DIBH) and patient movement during tangential b
Externí odkaz:
https://doaj.org/article/08ea604451104dcfb1099f25e7f7b806
Publikováno v:
Journal of Indira Gandhi Institute of Medical Sciences, Vol 8, Iss 2, Pp 117-120 (2022)
The present article illustrates an attempt to design and test the reproducibility of low-cost patient positioning devices prepared in-house in the radiotherapy department. A rigid wood-polymer composite material stands with angulations, scales, and s
Externí odkaz:
https://doaj.org/article/bf2f797a91ff475a9c42c977168380f0
Publikováno v:
Iranian Journal of Medical Physics, Vol 19, Iss 5, Pp 282-289 (2022)
Introduction: To compare Patient-Specific Quality Assurance (PSQA) of 6 MV and 10 MV Volume Modulated Arc Therapy (VMAT) plans performed with Electronic Portal Imaging Device (EPID) kept at Isocenter 100 cm (Source to Imager Distance (SID)) using an
Externí odkaz:
https://doaj.org/article/12b689050d4146a0a48042fdd9af38a7
Publikováno v:
Journal of Yeungnam Medical Science, Vol 39, Iss 2, Pp 108-115 (2022)
Background This study was aimed at comparing and analyzing the results of FractionLab (Varian/Mobius Medical System) with those of portal dosimetry that uses an electronic portal imaging device. Portal dosimetry is extensively used for patient-specif
Externí odkaz:
https://doaj.org/article/315eca475b3b49628ca0cfbfd173f401
Autor:
James L. Bedford, Ian M. Hanson
Publikováno v:
Physics and Imaging in Radiation Oncology, Vol 22, Iss , Pp 36-43 (2022)
Background and purpose: Real-time portal dosimetry compares measured images with predicted images to detect delivery errors as the radiotherapy treatment proceeds. This work aimed to investigate the performance of a recurrent neural network for proce
Externí odkaz:
https://doaj.org/article/6bce58f953564fc19945773b963934df