Results 201 to 210 of about 66,716 (273)

Perioperative nursing coordination and complication management in Yttrium-90 radioactive microsphere therapy for hepatocellular carcinoma. [PDF]

Front Med (Lausanne)
Li X, Shang Q.
europepmc   +1 more source

Dosimetry with a fluoroscopic electronic portal imaging device

, 1999
openaire   +1 more source

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Electronic Portal Imaging Device in Pre-Treatment Patient-Specific Quality Assurance of volumetric-modulated arc therapy delivery

Journal of Radiotherapy in Practice, 2022
Background: Radiotherapy treatment delivery is evaluated by a pre-treatment patient-specific quality assurance (PSQA) procedure to ensure the patient receives an accurate radiation dose.
M. Lau, R. Abdullah, J. Jayamani
semanticscholar   +1 more source

Deep learning-based 3D in vivo dose reconstruction with an electronic portal imaging device for magnetic resonance-linear accelerators: a proof of concept study

Physics in Medicine and Biology, 2021
Objective. To develop a novel deep learning-based 3D in vivo dose reconstruction framework with an electronic portal imaging device (EPID) for magnetic resonance-linear accelerators (MR-LINACs). Approach.
Yongbao Li, Fan Xiao, Biaoshui Liu, M. Qi, Xingyu Lu, Jiajun Cai, Linghong Zhou, T. Song   +7 more
semanticscholar   +1 more source

Assessing the accuracy of electronic portal imaging device (EPID)-based dosimetry: I. Quantities influencing long-term stability.

Medical Physics (Lancaster), 2021
PURPOSE The aim of this study is to reduce the uncertainty associated with determining dose-to-water using an amorphous silicon electronic portal imaging detector (EPID) under reference conditions by identifying and accounting for operational and ...
J. Renaud, B. Muir
semanticscholar   +1 more source

Assessing the accuracy of electronic portal imaging device (EPID)-based dosimetry: II. Evaluation of a dosimetric uncertainty budget and development of a new film-in-EPID absorbed dose calibration methodology.

Medical Physics (Lancaster), 2021
PURPOSE The aim of this study is to reduce the uncertainty associated with determining dose-to-water using an amorphous silicon electronic portal imaging detector (EPID) under reference conditions by developing a direct calibration formalism based on ...
J. Renaud, B. Muir
semanticscholar   +1 more source

Measurement possibilities using an electronic portal imaging device

Medical Dosimetry, 1993
A vital role in the quality control of radiotherapy is the use of portal imaging for verifying field size, shape, orientation and patient set-up. Coincidence of treated volume and target volume is imperative. Electronic portal imaging devices are effective at providing this verification.
M C, Kirby, P C, Williams
openaire   +2 more sources

An electronic portal imaging device for transit dosimetry

Physics in Medicine and Biology, 1997
An electronic portal imaging device has been designed and constructed. It consists of an array of 128 CsI scintillation crystals coupled to photodiodes which is scanned across the field in 4 seconds. The linac is operated at a dose rate of 400 cGy min-1 and the dose delivered for image acquisition is approximately 27 cGy.
SymondsTayler, JRN, Partridge, M, Evans, PM   +2 more
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Use of electronic portal imaging devices for electron treatment verification

Australasian Physical & Engineering Sciences in Medicine, 2015
This study aims to help broaden the use of electronic portal imaging devices (EPIDs) for pre-treatment patient positioning verification, from photon-beam radiotherapy to photon- and electron-beam radiotherapy, by proposing and testing a method for acquiring clinically-useful EPID images of patient anatomy using electron beams, with a view to enabling ...
Kairn, T., Aland, T., Crowe, S. B., Trapp, J. V.   +3 more
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Routine individualised patient dosimetry using electronic portal imaging devices

Radiotherapy and Oncology, 2007
To analyse the results of routine EPID measurements for individualised patient dosimetry.Calibrated camera-based EPIDs were used to measure the central field dose, which was compared with a dose prediction at the EPID level. For transit dosimetry, dose data were calculated using patient transmission and scatter, and compared with measured values ...
Sebastiaan M J J G, Nijsten, Ben J, Mijnheer, André L A J, Dekker, Philippe, Lambin, André W H, Minken   +4 more
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