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Estimation of the shielding ability of a tungsten functional paper for diagnostic x‐rays and gamma rays

Tungsten functional paper (TFP) is a novel paper‐based radiation‐shielding material. We measured the shielding ability of TFP against x‐rays and gamma rays. The TFP was supplied in 0.3‐mm‐thick sheets that contained 80% tungsten powder and 20% cellulose (C(6)H(10)O(5)) by mass. In dose measurements...

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Autores principales: Monzen, Hajime, Kanno, Ikuo, Fujimoto, Takahiro, Hiraoka, Masahiro
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5875830/
https://www.ncbi.nlm.nih.gov/pubmed/28656739
http://dx.doi.org/10.1002/acm2.12122
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author Monzen, Hajime
Kanno, Ikuo
Fujimoto, Takahiro
Hiraoka, Masahiro
author_facet Monzen, Hajime
Kanno, Ikuo
Fujimoto, Takahiro
Hiraoka, Masahiro
author_sort Monzen, Hajime
collection PubMed
description Tungsten functional paper (TFP) is a novel paper‐based radiation‐shielding material. We measured the shielding ability of TFP against x‐rays and gamma rays. The TFP was supplied in 0.3‐mm‐thick sheets that contained 80% tungsten powder and 20% cellulose (C(6)H(10)O(5)) by mass. In dose measurements for x‐rays (60, 80, 100, and 120 kVp), we measured doses after through 1, 2, 3, 5, 10, and 12 TFP sheets, as well as 0.3 and 0.5 mm of lead. In lead equivalence measurements, we measured doses after through 2 and 10 TFP sheets for x‐rays (100 and 150 kVp), and 0, 7, 10, 20, and 30 TFP sheets for gamma rays from cesium‐137 source (662 keV). And then, the lead equivalent thicknesses of TFP were determined by comparison with doses after through standard lead plates (purity >99.9%). Additionally, we evaluated uniformity of the transmitted dose by TFP with a computed radiography image plate for 50 kVp x‐rays. A single TFP sheet was found to have a shielding ability of 65%, 53%, 48%, and 46% for x‐rays (60, 80, 100, and 120 kVp), respectively. The lead equivalent thicknesses of two TFP sheets were 0.10 ± 0.02, 0.09 ± 0.02 mmPb, and of ten TFP sheets were 0.48 ± 0.02 and 0.51 ± 0.02 mmPb for 100 and 150 kVp x‐rays, respectively. The lead equivalent thicknesses of 7, 10, 20, and 30 sheets of TFP for gamma rays from cesium‐137 source were estimated as 0.28, 0.43, 0.91, and 1.50 mmPb with an error of ± 0.01 mm. One TFP sheet had nonuniformity, however, seven TFP sheets provided complete shielding for 50 kVp x‐rays. TFP has adequate radiation shielding ability for x‐rays and gamma rays within the energy range used in diagnostic imaging field.
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spelling pubmed-58758302018-04-02 Estimation of the shielding ability of a tungsten functional paper for diagnostic x‐rays and gamma rays Monzen, Hajime Kanno, Ikuo Fujimoto, Takahiro Hiraoka, Masahiro J Appl Clin Med Phys Radiation Protection & Regulations Tungsten functional paper (TFP) is a novel paper‐based radiation‐shielding material. We measured the shielding ability of TFP against x‐rays and gamma rays. The TFP was supplied in 0.3‐mm‐thick sheets that contained 80% tungsten powder and 20% cellulose (C(6)H(10)O(5)) by mass. In dose measurements for x‐rays (60, 80, 100, and 120 kVp), we measured doses after through 1, 2, 3, 5, 10, and 12 TFP sheets, as well as 0.3 and 0.5 mm of lead. In lead equivalence measurements, we measured doses after through 2 and 10 TFP sheets for x‐rays (100 and 150 kVp), and 0, 7, 10, 20, and 30 TFP sheets for gamma rays from cesium‐137 source (662 keV). And then, the lead equivalent thicknesses of TFP were determined by comparison with doses after through standard lead plates (purity >99.9%). Additionally, we evaluated uniformity of the transmitted dose by TFP with a computed radiography image plate for 50 kVp x‐rays. A single TFP sheet was found to have a shielding ability of 65%, 53%, 48%, and 46% for x‐rays (60, 80, 100, and 120 kVp), respectively. The lead equivalent thicknesses of two TFP sheets were 0.10 ± 0.02, 0.09 ± 0.02 mmPb, and of ten TFP sheets were 0.48 ± 0.02 and 0.51 ± 0.02 mmPb for 100 and 150 kVp x‐rays, respectively. The lead equivalent thicknesses of 7, 10, 20, and 30 sheets of TFP for gamma rays from cesium‐137 source were estimated as 0.28, 0.43, 0.91, and 1.50 mmPb with an error of ± 0.01 mm. One TFP sheet had nonuniformity, however, seven TFP sheets provided complete shielding for 50 kVp x‐rays. TFP has adequate radiation shielding ability for x‐rays and gamma rays within the energy range used in diagnostic imaging field. John Wiley and Sons Inc. 2017-06-28 /pmc/articles/PMC5875830/ /pubmed/28656739 http://dx.doi.org/10.1002/acm2.12122 Text en © 2017 The Authors. Journal of Applied Clinical Medical Physics published by Wiley Periodicals, Inc. on behalf of American Association of Physicists in Medicine. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Radiation Protection & Regulations
Monzen, Hajime
Kanno, Ikuo
Fujimoto, Takahiro
Hiraoka, Masahiro
Estimation of the shielding ability of a tungsten functional paper for diagnostic x‐rays and gamma rays
title Estimation of the shielding ability of a tungsten functional paper for diagnostic x‐rays and gamma rays
title_full Estimation of the shielding ability of a tungsten functional paper for diagnostic x‐rays and gamma rays
title_fullStr Estimation of the shielding ability of a tungsten functional paper for diagnostic x‐rays and gamma rays
title_full_unstemmed Estimation of the shielding ability of a tungsten functional paper for diagnostic x‐rays and gamma rays
title_short Estimation of the shielding ability of a tungsten functional paper for diagnostic x‐rays and gamma rays
title_sort estimation of the shielding ability of a tungsten functional paper for diagnostic x‐rays and gamma rays
topic Radiation Protection & Regulations
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5875830/
https://www.ncbi.nlm.nih.gov/pubmed/28656739
http://dx.doi.org/10.1002/acm2.12122
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