Results 11 to 20 of about 418,007 (311)
Determination of Some Heavyweight Aggregate Half Value Layer Thickness Used for Radiation Shielding
Acta Physica Polonica A, 2012 A radiation dose above the maximum permissible limit is very dangerous for human being. In radiation shielding, absorbent materials’ properties must be well known. Heavyweight concrete is the most widely used in the world for this aim. The aggregate component of concrete plays an important role in improving concrete properties and this is effect of ...
AKKURT, İskender +5 more
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Mathematical estimation of half-value layer thicknesses. [PDF]
J Appl Clin Med Phys, 2021 AbstractObjectiveThe objective of this article is to introduce a simplified and swift method to satisfactorily estimate the half‐value layers (HVL), quarter‐value layer (QVL), and tenth‐value layer (TVL) from the x‐ray spectra emitted by any diagnostic radiology or kV radiotherapy x‐ray tubes.MethodsA CdTe x‐ray and Gamma detector (X‐123 CdTe, AmpTek ...
Omoumi FH +5 more
europepmc +4 more sources
Determination of the Tenth and Half Value Layer Thickness of Concretes with Different Densities
Acta Physica Polonica A, 2016 Half value layer (HVL) is the most frequently used quantitative factor for describing both the penetrating ability of specific radiations and the penetration through specific objects. The half value layers (HVL) and tenth value layers (TVL) are defined as the thickness of a shield or an absorber that reduces the radiation level by a factor of one-half ...
Akkaş, A.
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Real-time dosimeter employed to evaluate the half-value layer in CT. [PDF]
Phys Med Biol, 2014 Half-value layer (HVL) measurements on commercial whole body computer tomography (CT) scanners require serial measurements and, in many institutions, the presence of a service engineer. An assembly of aluminum filters (AAF), designed to be used in conjunction with a real-time dosimeter, was developed to provide estimates of the HVL using clinical ...
McKenney SE +6 more
europepmc +6 more sources
A pilot study of half-value layer measurements using a semiconductor dosimeter for intraoral radiography. [PDF]
Imaging Sci Dent, 2023 This pilot study was conducted to evaluate half-value layer (HVL) measurements obtained using a semiconductor dosimeter for intraoral radiography.This study included 8 aluminum plates, 4 of which were low-purity (less than 99.9%) and 4 high-purity (greater than 99.9%). Intraoral radiography was performed using an intraoral X-ray unit in accordance with
Nouchi S +5 more
europepmc +3 more sources
Measurement of Half-value Layer in Mammography
Japanese Journal of Radiological Technology, 2003 The half-value layer (HVL) of an X-ray beam for film-screen mammography is considered an important parameter for image quality and patient dose. Thus, HVL must be measured in accordance with The Manual of Accuracy for Mammography printed by the Japanese Society of Radiological Technology.
Hirofumi, Yagi +4 more
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Radiation shielding potential of ultra-high strength concrete from agro-industrial waste [PDF]
Nuclear Technology and Radiation ProtectionUltra-high strength concrete produced with agro-residual wastes and industrial by-products were tested for radiation shielding capacity by measuring the linear attenuation coefficient, half value layer and tenth value layer.
Rajkumar Deivendiran +2 more
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The Precision of Half-value Layer Measurement on Mammography
Japanese Journal of Radiological Technology, 2011 The half-value layer (HVL) is an important index of the image quality or radiation risk in mammography. Radiation risk of the breast tissue is evaluated with the average glandular dose. The HVL index is indispensable for the average glandular dose computations.
Ishii, Rie +4 more
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Determining X-Ray Effective Energy in Linear Accelerator (LINAC) Radiotherapy Instrument
Jurnal Ilmiah Pendidikan Fisika Al-Biruni, 2018 This research in determining x-ray effective energy in linear accelerator (Linac) radiotherapy device was done using copper plates at different thicknesses by determining the Half Value Layer (HVL) for each energy. The purpose of this research is to know
Fauziah Fauziah, Bualkar Abdullah
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Upper Bounds to the Performance of Cooperative Traffic Relaying in Wireless Linear Networks [PDF]
, 2013 Wireless networks with linear topology, where nodes generate their own traffic and relay other nodes' traffic, have attracted increasing attention. Indeed, they well represent sensor networks monitoring paths or streets, as well as multihop networks for ...
CHIASSERINI, Carla Fabiana +3 more
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