Results 1 to 10 of about 1,506,118 (205)
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
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
Investigation of gamma radiation shielding features for modified structural materials for nuclear energy and nuclear medicine [PDF]
Nuclear Technology and Radiation Protection, 2023 In this paper, shielding characteristics of three concrete samples with different B4C,Fe3O4,and BaSO4 contents were examined by determining their theoretical and experimental mass attenuation coefficients at photon energies of 15 MeV.
Zaripova Yuliya +4 more
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Süleyman Demirel Üniversitesi Fen-Edebiyat Fakültesi Fen Dergisi, 2023 Half-value layer (HVL) is energy dependent on the photon, much as the attenuation coefficient. Increasing the penetrating energy of a photon stream causes an increase in a substance's HVL.
Hasan Bircan +2 more
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Gamma Radiation Shielding Properties of Slag and Fly Ash-based Geopolymers
Atom Indonesia, 2021 Industrial waste-based geopolymer cement is a greener alternative to Ordinary Portland Cement (OPC) for radiation shielding with comparable mechanical properties without the production of CO2 during synthesis.
M. W. Hasan +2 more
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Lead-borate glass system doped with Sm3+ ions for the X-ray shielding applications
Results in Physics, 2022 The impact of varying Sm2O3 content on radiation shielding properties of 15PbF2: (65-x) B2O3: 20K2O:xSm2O3 (where 0 ≤ x ≤ 1.5 mol %) glass samples, was investigated by studying their physical, radio-luminescence and X-ray-shielding characteristics.
S. Mukamil +11 more
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Nuclear Engineering and Technology, 2022 Soils are porous materials with high shielding capability to attenuate gamma and X-rays. The disposal of radionuclides throughout the soil profile can expose the living organisms to ionizing radiation.
Luiz F. Pires
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Effect of Waste Iron Filings (IF) on Radiation Shielding Feature of Polyepoxide Composites
Crystals, 2023 In the present work, photon and neutron attenuation properties of polyepoxide composites produced by doping waste iron filings (IF) at different percentages (0%, 20%, 40%, and 60% iron filing percentage) were obtained using theoretical and experimental ...
Mohammed T. Alresheedi, Mohamed Elsafi
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Journal of Applied Sciences and Environmental Management, 2023 Radiation shielding is essential for protecting workers, patients, and the environment from harmful effects of radiation. To achieve effective and non-toxic shielding, scientists are interested in developing lead-free materials with low thickness that ...
M. N. Isa, M. Alhassan, H. A. Ibrahim
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Comparação entre métodos de medição da camada semi-redutora em radiologia
Brazilian Journal of Radiation Sciences, 2021 The Half Value Layer (HVL) is a parameter used in Quality Control (QC), to evaluate the X-ray beam quality. The HVL can be measured through the X-ray primary beam attenuation measurement using knew thickness slabs of 99% purity aluminum (M1) or by ...
Denyel Jefferson Prado Faria +4 more
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