Results 1 to 10 of about 1,079,802 (320)

A rapid and direct method for half value layer calculations for nuclear safety studies using MCNPX Monte Carlo code [PDF]

Nuclear Engineering and Technology, 2022
Half Value Layer calculations theoretically need prior specification of linear attenuation calculations, since the HVL value is derived by dividing ln(2) by the linear attenuation coefficient.
H.O. Tekin, Ghada ALMisned, Shams A.M. Issa, Hesham M.H. Zakaly   +3 more
doaj   +5 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, Seibert JA, Burkett GW, Gelskey D, Sunde PB, Newman JD, Boone JM.   +6 more
europepmc   +8 more sources

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, Wu X, Ghani MU, Wong MD, Li Y, Liu H.   +5 more
europepmc   +5 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.
core   +3 more sources

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, Akkaş, A., Mavi, B., Günoǧlu, Kadir, KILINÇARSLAN, Şemsettin, BAŞYİĞİT, Celalettin   +5 more
core   +5 more sources

ISO 4037-2019 validation of radiation qualities by means of half-value layer and. Hp(10) dosimetry.

Radiation Protection Dosimetry, 2019
Radiation qualities were characterised and validated at the fully automated X-ray calibration facility of the Individual Monitoring Service at Helmholtz Zentrum Munchen by using half-value layer and H-p(10) dosimetry approaches specified in the updated ...
Greiter, M., Bandalo, V., Hödlmoser, H., Brönner, J.   +3 more
core   +2 more sources

Constancy of the Half Value Layer of Cobalt-doped borate glasses with Lanthanum Oxide Additive at Extremely High Radiation Energy

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
doaj   +3 more sources

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, Yoshida, Akira, Ishii, Mie, Fujimoto, Shiho, Henmi, Noriko   +4 more
openaire   +4 more sources

Half-value layer measurement: simple process method using radiochromic film [PDF]

Australasian Physics & Engineering Sciences in Medicine, 2009
Although the half-value layer (HVL) is one of the important parameters for QA and QC, constant monitoring has not been performed because the measurements using an ionization chamber (IC) are time-consuming and complicated. To solve these problems, the use of radiochromic film (GAFCHROMIC XR TYPE R: GAF-R) with step-shaped aluminum (Al) filters ...
T, Gotanda, T, Katsuda, R, Gotanda, A, Tabuchi, K, Yamamoto, T, Kuwano, H, Yatake, K, Kashiyama, Y, Takeda   +8 more
openaire   +3 more sources

Comparative half value layer study of novel PbO-B2O3-CuO-CaO glasses with previous reports

Nexus of Future Materials
This work intends to assess the gamma-ray shielding performance of newly fabricated glasses with diversified content of PbO and B2O3, as well as compare the results with those of previously reported glasses from different authors.
Heryanto, H. (Heryanto), Akouibaa, A. (Ahmed), Setiawan, V. (Vicram), Veeravelan, K. (K.)   +3 more
core   +2 more sources