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The dose penumbra of a custom‐made shield used in hemibody skin electron irradiation

We report our technique for hemibody skin electron irradiation with a custom‐made plywood shield. The technique is similar to our clinical total skin electron irradiation (TSEI), performed with a six‐pair dual field (Stanford technique) at an extended source‐to‐skin distance (SSD) of 377 cm, with th...

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Autores principales: Rivers, Charlotte I., AlDahlawi, Ismail, Wang, Iris Z., Singh, Anurag K., Podgorsak, Matthew B.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5690530/
https://www.ncbi.nlm.nih.gov/pubmed/27929500
http://dx.doi.org/10.1120/jacmp.v17i6.6367
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author Rivers, Charlotte I.
AlDahlawi, Ismail
Wang, Iris Z.
Singh, Anurag K.
Podgorsak, Matthew B.
author_facet Rivers, Charlotte I.
AlDahlawi, Ismail
Wang, Iris Z.
Singh, Anurag K.
Podgorsak, Matthew B.
author_sort Rivers, Charlotte I.
collection PubMed
description We report our technique for hemibody skin electron irradiation with a custom‐made plywood shield. The technique is similar to our clinical total skin electron irradiation (TSEI), performed with a six‐pair dual field (Stanford technique) at an extended source‐to‐skin distance (SSD) of 377 cm, with the addition of a plywood shield placed at 50 cm from the patient. The shield is made of three layers of standard 5/8” thick plywood (total thickness of 4.75 cm) that are clamped securely on an adjustable‐height stand. Gafchromic EBT3 films were used in assessing the shield's transmission factor and the extent of the dose penumbra region for two different shield‐phantom gaps. The shield transmission factor was found to be about 10%. The width of the penumbra (80%‐to‐20% dose falloff) was measured to be 12 cm for a 50 cm shield‐phantom gap, and reduced slightly to 10 cm for a 35 cm shield‐phantom gap. In vivo dosimetry of a real case confirmed the expected shielded area dose. PACS number(s): 87.53.Bn
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spelling pubmed-56905302018-04-02 The dose penumbra of a custom‐made shield used in hemibody skin electron irradiation Rivers, Charlotte I. AlDahlawi, Ismail Wang, Iris Z. Singh, Anurag K. Podgorsak, Matthew B. J Appl Clin Med Phys Radiation Oncology Physics We report our technique for hemibody skin electron irradiation with a custom‐made plywood shield. The technique is similar to our clinical total skin electron irradiation (TSEI), performed with a six‐pair dual field (Stanford technique) at an extended source‐to‐skin distance (SSD) of 377 cm, with the addition of a plywood shield placed at 50 cm from the patient. The shield is made of three layers of standard 5/8” thick plywood (total thickness of 4.75 cm) that are clamped securely on an adjustable‐height stand. Gafchromic EBT3 films were used in assessing the shield's transmission factor and the extent of the dose penumbra region for two different shield‐phantom gaps. The shield transmission factor was found to be about 10%. The width of the penumbra (80%‐to‐20% dose falloff) was measured to be 12 cm for a 50 cm shield‐phantom gap, and reduced slightly to 10 cm for a 35 cm shield‐phantom gap. In vivo dosimetry of a real case confirmed the expected shielded area dose. PACS number(s): 87.53.Bn John Wiley and Sons Inc. 2016-11-08 /pmc/articles/PMC5690530/ /pubmed/27929500 http://dx.doi.org/10.1120/jacmp.v17i6.6367 Text en © 2016 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 Radiation Oncology Physics
Rivers, Charlotte I.
AlDahlawi, Ismail
Wang, Iris Z.
Singh, Anurag K.
Podgorsak, Matthew B.
The dose penumbra of a custom‐made shield used in hemibody skin electron irradiation
title The dose penumbra of a custom‐made shield used in hemibody skin electron irradiation
title_full The dose penumbra of a custom‐made shield used in hemibody skin electron irradiation
title_fullStr The dose penumbra of a custom‐made shield used in hemibody skin electron irradiation
title_full_unstemmed The dose penumbra of a custom‐made shield used in hemibody skin electron irradiation
title_short The dose penumbra of a custom‐made shield used in hemibody skin electron irradiation
title_sort dose penumbra of a custom‐made shield used in hemibody skin electron irradiation
topic Radiation Oncology Physics
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5690530/
https://www.ncbi.nlm.nih.gov/pubmed/27929500
http://dx.doi.org/10.1120/jacmp.v17i6.6367
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