Results 11 to 20 of about 4,851,518 (333)
Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022 Abstract Purpose MRI is increasingly used for brain and head and neck radiotherapy treatment planning due to its superior soft tissue contrast. Flexible array coils can be arranged to encompass treatment immobilization devices, which do not fit in diagnostic head/neck coils. Selecting a flexible coil arrangement to replace a diagnostic coil should rely
Evangelia Kaza +6 more
wiley +1 more source
Treatment planning with a 2.5 MV photon beam for radiation therapy
Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022 Abstract Purpose The shallow depth of maximum dose and higher dose fall‐off gradient of a 2.5 MV beam along the central axis that is available for imaging on linear accelerators is investigated for treatment of shallow tumors and sparing the organs at risk (OARs) beyond it.
Navid Khaledi +5 more
wiley +1 more source
Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022 Abstract The present study was conducted as part of a comprehensive work to establish National Diagnostic Reference Levels (NDRLs) in Sri Lanka for the first time. DRLs can be used as an effective optimization tool for identifying unusually high or low patient doses during X‐ray examinations.
Sachith Welarathna +3 more
wiley +1 more source
Nature Communications, 2022 Vaccine effectiveness of a ChAdOx1-S booster was estimated in a test-negative case-control study in England. Protection was found to be moderate against mild disease but remained high and comparable to that of an mRNA booster against hospitalisation with
Freja Cordelia Møller Kirsebom +5 more
doaj +1 more source
The impact of foreign markets globalization on the price and functionality of electronic access control systems [PDF]
SHS Web of Conferences, 2021 Research background: The research, which is the subject of the paper, is based on the global expansion of the use of electronic access control systems using biometric data for user verification.
Boroš Martin, Lenko Filip, Velas Andrej
doaj +1 more source
Complex & Intelligent Systems, 2023 At present, terrorism has become an important factor affecting world peace and development. As the time series data of terrorist attacks usually show a high degree of spatial–temporal correlation, the spatial–temporal prediction of casualties in ...
Zhiwen Hou +3 more
doaj +1 more source
Modified Total Evaporation Method for Highly Precise Measurement of Uranium Isotopes Ratio [PDF]
Zhipu Xuebao, 2023 Thermal ionization mass spectrometry (TIMS) is a well-established instrumental technique for accurately analyzing isotopes of elements with low first ionization potential.
ZHANG Ji-long1 +8 more
doaj +1 more source
Nature Communications, 2022 SARS-CoV-2 variants of concern have been associated with reduced vaccine effectiveness, even after a booster dose. In this study, authors aim to estimate vaccine effectiveness against hospitalisation with the Omicron and Delta variants, using different ...
Julia Stowe +4 more
doaj +1 more source
Risk Assessment for Illegal Waste Open Burning [PDF]
E3S Web of Conferences, 2021 The area of Naples and Campania region, in Italy, has been experiencing the dramatic consequences of diffuse open burning of illegal waste, resulting in possible threats to human health. The need of evaluating a risk index of open burning rises from this
Buzzo Gianpiero +5 more
doaj +1 more source
Composite Metrics for Network Security Analysis [PDF]
Software Networking, 2018(1), 137-160, 2020 Security metrics present the security level of a system or a network in both qualitative and quantitative ways. In general, security metrics are used to assess the security level of a system and to achieve security goals. There are a lot of security metrics for security analysis, but there is no systematic classification of security metrics that are ...
arxiv +1 more source