Increased Skin Dose With the Use of a Custom Mattress for Prone Breast Radiotherapy
Abstract The purpose of this study was to measure and compare the loss of buildup to the skin of the breast in the prone position due to 2 different positioning systems during tangential external beam irradiation. Two experiments were performed; one with a standard nylon-covered foam support and ano...
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Veröffentlicht in: | Medical dosimetry : official journal of the American Association of Medical Dosimetrists 2007, Vol.32 (3), p.196-199 |
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description | Abstract The purpose of this study was to measure and compare the loss of buildup to the skin of the breast in the prone position due to 2 different positioning systems during tangential external beam irradiation. Two experiments were performed; one with a standard nylon-covered foam support and another with a novel helium-filled Mylar bag support. The choice of helium-filled Mylar was to reduce the contamination to as low as possible. The experiments were designed to allow a surface dose measurement and a depth dose profile with the pads placed in the path of the beam in front of the detector. All measurements were taken using a Capintec PS-033 thin-window parallel plate ionization chamber. The standard nylon-covered foam pad caused the surface dose to rise as it got closer to the skin. When the pad was directly touching the surface, the surface dose increased by 300% compared to the result when no pad was present. This loss of buildup to the surface was similar to that of a custom bolus material. The opposite effect occurred with the use of the helium-filled Mylar bag, namely the surface dose gradually decreased as the pad got closer to the phantom. When the Mylar pad was directly touching the phantom, the surface dose was decreased by 7% compared to when no pad was present. The use of a foam pad could potentially result in a significant higher dose to the skin, resulting in an enhanced acute skin reaction. Therefore, special care should be taken in this clinical scenario and further investigation of an air- or helium-based mylar support pad should be investigated in the context of definitive breast radiation treatment. |
doi_str_mv | 10.1016/j.meddos.2007.01.011 |
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Two experiments were performed; one with a standard nylon-covered foam support and another with a novel helium-filled Mylar bag support. The choice of helium-filled Mylar was to reduce the contamination to as low as possible. The experiments were designed to allow a surface dose measurement and a depth dose profile with the pads placed in the path of the beam in front of the detector. All measurements were taken using a Capintec PS-033 thin-window parallel plate ionization chamber. The standard nylon-covered foam pad caused the surface dose to rise as it got closer to the skin. When the pad was directly touching the surface, the surface dose increased by 300% compared to the result when no pad was present. This loss of buildup to the surface was similar to that of a custom bolus material. The opposite effect occurred with the use of the helium-filled Mylar bag, namely the surface dose gradually decreased as the pad got closer to the phantom. When the Mylar pad was directly touching the phantom, the surface dose was decreased by 7% compared to when no pad was present. The use of a foam pad could potentially result in a significant higher dose to the skin, resulting in an enhanced acute skin reaction. Therefore, special care should be taken in this clinical scenario and further investigation of an air- or helium-based mylar support pad should be investigated in the context of definitive breast radiation treatment.</description><identifier>ISSN: 0958-3947</identifier><identifier>EISSN: 1873-4022</identifier><identifier>DOI: 10.1016/j.meddos.2007.01.011</identifier><identifier>PMID: 17707199</identifier><language>eng</language><publisher>United States: Elsevier Inc</publisher><subject>Breast ; Breast Neoplasms - radiotherapy ; Buildup ; DEPTH DOSE DISTRIBUTIONS ; Female ; FOAMS ; HELIUM ; Hematology, Oncology and Palliative Medicine ; Humans ; IONIZATION CHAMBERS ; MAMMARY GLANDS ; MYLAR ; PHANTOMS ; Prone mattress ; Prone Position ; Prone positioning ; RADIATION DOSES ; RADIATION PROTECTION AND DOSIMETRY ; Radiology ; RADIOTHERAPY ; Radiotherapy Dosage ; SKIN ; Skin - radiation effects ; Skin dose</subject><ispartof>Medical dosimetry : official journal of the American Association of Medical Dosimetrists, 2007, Vol.32 (3), p.196-199</ispartof><rights>American Association of Medical Dosimetrists</rights><rights>2007 American Association of Medical Dosimetrists</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c443t-c97fac43ad8048673968a8e465f455bb62b0de023f97d873475c36a9975af2cb3</citedby><cites>FETCH-LOGICAL-c443t-c97fac43ad8048673968a8e465f455bb62b0de023f97d873475c36a9975af2cb3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.meddos.2007.01.011$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>230,314,780,784,885,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/17707199$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/21045973$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Becker, Stewart J., Ph.D</creatorcontrib><creatorcontrib>Patel, Rakesh R., M.D</creatorcontrib><creatorcontrib>Mackie, Thomas R., Ph.D</creatorcontrib><title>Increased Skin Dose With the Use of a Custom Mattress for Prone Breast Radiotherapy</title><title>Medical dosimetry : official journal of the American Association of Medical Dosimetrists</title><addtitle>Med Dosim</addtitle><description>Abstract The purpose of this study was to measure and compare the loss of buildup to the skin of the breast in the prone position due to 2 different positioning systems during tangential external beam irradiation. Two experiments were performed; one with a standard nylon-covered foam support and another with a novel helium-filled Mylar bag support. The choice of helium-filled Mylar was to reduce the contamination to as low as possible. The experiments were designed to allow a surface dose measurement and a depth dose profile with the pads placed in the path of the beam in front of the detector. All measurements were taken using a Capintec PS-033 thin-window parallel plate ionization chamber. The standard nylon-covered foam pad caused the surface dose to rise as it got closer to the skin. When the pad was directly touching the surface, the surface dose increased by 300% compared to the result when no pad was present. This loss of buildup to the surface was similar to that of a custom bolus material. The opposite effect occurred with the use of the helium-filled Mylar bag, namely the surface dose gradually decreased as the pad got closer to the phantom. When the Mylar pad was directly touching the phantom, the surface dose was decreased by 7% compared to when no pad was present. The use of a foam pad could potentially result in a significant higher dose to the skin, resulting in an enhanced acute skin reaction. Therefore, special care should be taken in this clinical scenario and further investigation of an air- or helium-based mylar support pad should be investigated in the context of definitive breast radiation treatment.</description><subject>Breast</subject><subject>Breast Neoplasms - radiotherapy</subject><subject>Buildup</subject><subject>DEPTH DOSE DISTRIBUTIONS</subject><subject>Female</subject><subject>FOAMS</subject><subject>HELIUM</subject><subject>Hematology, Oncology and Palliative Medicine</subject><subject>Humans</subject><subject>IONIZATION CHAMBERS</subject><subject>MAMMARY GLANDS</subject><subject>MYLAR</subject><subject>PHANTOMS</subject><subject>Prone mattress</subject><subject>Prone Position</subject><subject>Prone positioning</subject><subject>RADIATION DOSES</subject><subject>RADIATION PROTECTION AND DOSIMETRY</subject><subject>Radiology</subject><subject>RADIOTHERAPY</subject><subject>Radiotherapy Dosage</subject><subject>SKIN</subject><subject>Skin - radiation effects</subject><subject>Skin dose</subject><issn>0958-3947</issn><issn>1873-4022</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkV-L1DAUxYMo7rj6DUQCgm8db5q0aV4EHf8t7LLiuPgY0vSWyWynGZNUmG9vSgeEfVm4EELOuffmdwh5zWDNgNXv9-sDdp2P6xJAroHlYk_IijWSFwLK8ilZgaqagishL8iLGPcAUAngz8kFkxIkU2pFtlejDWgidnR770b62Uekv13a0bRDepcvvqeGbqaY_IHemJQCxkh7H-iP4Eekn2Z3oj9N53y2BHM8vSTPejNEfHU-L8nd1y-_Nt-L69tvV5uP14UVgqfCKtkbK7jpGhBNLbmqG9OgqKteVFXb1mULHULJeyW7_CshK8tro5SsTF_all-St0tfH5PT0bqEdmf9OKJNumQgKiV5Vr1bVMfg_0wYkz64aHEYzIh-irpuWMNYqbJQLEIbfIwBe30M7mDCSTPQM3K91wtyPSPXwHKxbHtz7j-1-fm_6cw4Cz4sAsws_joM86o4WuxcmDftvHtswsMGdnCjs2a4xxPGvZ_CmDlrpmOpQW_n2OfUQebEOZf8Hwi_pw4</recordid><startdate>2007</startdate><enddate>2007</enddate><creator>Becker, Stewart J., Ph.D</creator><creator>Patel, Rakesh R., M.D</creator><creator>Mackie, Thomas R., Ph.D</creator><general>Elsevier Inc</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>OTOTI</scope></search><sort><creationdate>2007</creationdate><title>Increased Skin Dose With the Use of a Custom Mattress for Prone Breast Radiotherapy</title><author>Becker, Stewart J., Ph.D ; Patel, Rakesh R., M.D ; Mackie, Thomas R., Ph.D</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c443t-c97fac43ad8048673968a8e465f455bb62b0de023f97d873475c36a9975af2cb3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>Breast</topic><topic>Breast Neoplasms - radiotherapy</topic><topic>Buildup</topic><topic>DEPTH DOSE DISTRIBUTIONS</topic><topic>Female</topic><topic>FOAMS</topic><topic>HELIUM</topic><topic>Hematology, Oncology and Palliative Medicine</topic><topic>Humans</topic><topic>IONIZATION CHAMBERS</topic><topic>MAMMARY GLANDS</topic><topic>MYLAR</topic><topic>PHANTOMS</topic><topic>Prone mattress</topic><topic>Prone Position</topic><topic>Prone positioning</topic><topic>RADIATION DOSES</topic><topic>RADIATION PROTECTION AND DOSIMETRY</topic><topic>Radiology</topic><topic>RADIOTHERAPY</topic><topic>Radiotherapy Dosage</topic><topic>SKIN</topic><topic>Skin - radiation effects</topic><topic>Skin dose</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Becker, Stewart J., Ph.D</creatorcontrib><creatorcontrib>Patel, Rakesh R., M.D</creatorcontrib><creatorcontrib>Mackie, Thomas R., Ph.D</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>OSTI.GOV</collection><jtitle>Medical dosimetry : official journal of the American Association of Medical Dosimetrists</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Becker, Stewart J., Ph.D</au><au>Patel, Rakesh R., M.D</au><au>Mackie, Thomas R., Ph.D</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Increased Skin Dose With the Use of a Custom Mattress for Prone Breast Radiotherapy</atitle><jtitle>Medical dosimetry : official journal of the American Association of Medical Dosimetrists</jtitle><addtitle>Med Dosim</addtitle><date>2007</date><risdate>2007</risdate><volume>32</volume><issue>3</issue><spage>196</spage><epage>199</epage><pages>196-199</pages><issn>0958-3947</issn><eissn>1873-4022</eissn><abstract>Abstract The purpose of this study was to measure and compare the loss of buildup to the skin of the breast in the prone position due to 2 different positioning systems during tangential external beam irradiation. Two experiments were performed; one with a standard nylon-covered foam support and another with a novel helium-filled Mylar bag support. The choice of helium-filled Mylar was to reduce the contamination to as low as possible. The experiments were designed to allow a surface dose measurement and a depth dose profile with the pads placed in the path of the beam in front of the detector. All measurements were taken using a Capintec PS-033 thin-window parallel plate ionization chamber. The standard nylon-covered foam pad caused the surface dose to rise as it got closer to the skin. When the pad was directly touching the surface, the surface dose increased by 300% compared to the result when no pad was present. This loss of buildup to the surface was similar to that of a custom bolus material. The opposite effect occurred with the use of the helium-filled Mylar bag, namely the surface dose gradually decreased as the pad got closer to the phantom. When the Mylar pad was directly touching the phantom, the surface dose was decreased by 7% compared to when no pad was present. The use of a foam pad could potentially result in a significant higher dose to the skin, resulting in an enhanced acute skin reaction. Therefore, special care should be taken in this clinical scenario and further investigation of an air- or helium-based mylar support pad should be investigated in the context of definitive breast radiation treatment.</abstract><cop>United States</cop><pub>Elsevier Inc</pub><pmid>17707199</pmid><doi>10.1016/j.meddos.2007.01.011</doi><tpages>4</tpages></addata></record> |
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subjects | Breast Breast Neoplasms - radiotherapy Buildup DEPTH DOSE DISTRIBUTIONS Female FOAMS HELIUM Hematology, Oncology and Palliative Medicine Humans IONIZATION CHAMBERS MAMMARY GLANDS MYLAR PHANTOMS Prone mattress Prone Position Prone positioning RADIATION DOSES RADIATION PROTECTION AND DOSIMETRY Radiology RADIOTHERAPY Radiotherapy Dosage SKIN Skin - radiation effects Skin dose |
title | Increased Skin Dose With the Use of a Custom Mattress for Prone Breast Radiotherapy |
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