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Providing solid angle formalism for skyshine calculations

We detail, derive and correct the technical use of the solid angle variable identified in formal guidance that relates skyshine calculations to dose‐equivalent rate. We further recommend it for use with all National Council on Radiation Protection and Measurements (NCRP), Institute of Physics and En...

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Autores principales: Gossman, Michael S., Pahikkala, A. Jussi, Rising, Mary B., McGinley, Patton H.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2010
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5720402/
https://www.ncbi.nlm.nih.gov/pubmed/21081888
http://dx.doi.org/10.1120/jacmp.v11i4.3286
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author Gossman, Michael S.
Pahikkala, A. Jussi
Rising, Mary B.
McGinley, Patton H.
author_facet Gossman, Michael S.
Pahikkala, A. Jussi
Rising, Mary B.
McGinley, Patton H.
author_sort Gossman, Michael S.
collection PubMed
description We detail, derive and correct the technical use of the solid angle variable identified in formal guidance that relates skyshine calculations to dose‐equivalent rate. We further recommend it for use with all National Council on Radiation Protection and Measurements (NCRP), Institute of Physics and Engineering in Medicine (IPEM) and similar reports documented. In general, for beams of identical width which have different resulting areas, within [Formula: see text] maximum deviation the analytical pyramidal solution is 1.27 times greater than a misapplied analytical conical solution through all field sizes up to [Formula: see text]. Therefore, we recommend determining the exact results with the analytical pyramidal solution for square beams and the analytical conical solution for circular beams. PACS number(s): 87.52.‐g, 87.52.Df, 87.52.Tr, 87.53.‐j, 87.53.Bn, 87.53.Dq, 87.66.‐a, 89., 89.60.+x
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spelling pubmed-57204022018-04-02 Providing solid angle formalism for skyshine calculations Gossman, Michael S. Pahikkala, A. Jussi Rising, Mary B. McGinley, Patton H. J Appl Clin Med Phys Technical Notes We detail, derive and correct the technical use of the solid angle variable identified in formal guidance that relates skyshine calculations to dose‐equivalent rate. We further recommend it for use with all National Council on Radiation Protection and Measurements (NCRP), Institute of Physics and Engineering in Medicine (IPEM) and similar reports documented. In general, for beams of identical width which have different resulting areas, within [Formula: see text] maximum deviation the analytical pyramidal solution is 1.27 times greater than a misapplied analytical conical solution through all field sizes up to [Formula: see text]. Therefore, we recommend determining the exact results with the analytical pyramidal solution for square beams and the analytical conical solution for circular beams. PACS number(s): 87.52.‐g, 87.52.Df, 87.52.Tr, 87.53.‐j, 87.53.Bn, 87.53.Dq, 87.66.‐a, 89., 89.60.+x John Wiley and Sons Inc. 2010-08-17 /pmc/articles/PMC5720402/ /pubmed/21081888 http://dx.doi.org/10.1120/jacmp.v11i4.3286 Text en © 2010 The Authors. This is an open access article under the terms of the Creative Commons Attribution (http://creativecommons.org/licenses/by/3.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Technical Notes
Gossman, Michael S.
Pahikkala, A. Jussi
Rising, Mary B.
McGinley, Patton H.
Providing solid angle formalism for skyshine calculations
title Providing solid angle formalism for skyshine calculations
title_full Providing solid angle formalism for skyshine calculations
title_fullStr Providing solid angle formalism for skyshine calculations
title_full_unstemmed Providing solid angle formalism for skyshine calculations
title_short Providing solid angle formalism for skyshine calculations
title_sort providing solid angle formalism for skyshine calculations
topic Technical Notes
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5720402/
https://www.ncbi.nlm.nih.gov/pubmed/21081888
http://dx.doi.org/10.1120/jacmp.v11i4.3286
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