{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,6,15]],"date-time":"2025-06-15T04:05:02Z","timestamp":1749960302005,"version":"3.41.0"},"reference-count":8,"publisher":"IOP Publishing","issue":"3","license":[{"start":{"date-parts":[[2024,3,6]],"date-time":"2024-03-06T00:00:00Z","timestamp":1709683200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/iopscience.iop.org\/page\/copyright"},{"start":{"date-parts":[[2024,3,6]],"date-time":"2024-03-06T00:00:00Z","timestamp":1709683200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/iopscience.iop.org\/info\/page\/text-and-data-mining"}],"content-domain":{"domain":["iopscience.iop.org"],"crossmark-restriction":false},"short-container-title":["Biomed. Phys. Eng. Express"],"published-print":{"date-parts":[[2024,5,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>Radiometric surveys in radiotherapy bunkers have been carried out in Brazil for many years, both by the same radiotherapy facility for verification of shielding as by the regulatory agency for licensing and control purposes. In recent years, the Intensity Modulated Radiation Therapy (IMRT) technique has been gradually incorporated into many facilities. Therefore, it has been necessary to consider the increased leakage component that has an important impact on the secondary walls. For that, a radiometric survey method has been used that considers an increased \u2018time of beam\u2014on\u2019 for the secondary walls. In this work we discuss two methods of doing this: the first considers that this \u2018time of beam\u2014on\u2019 affects the sum of the two components, leakage and scattered. In another method it is considered that only the leakage component is affected by this extended \u2018time of beam\u2014on\u2019. We compare the methods and show that for secondary walls with <jats:italic>U<\/jats:italic> = 1 the first method overestimates dose rates by important percentages and for secondary walls with <jats:italic>U<\/jats:italic> &lt; 1 it can both overestimate or underestimate the dose rates, depending on the parameters of the project. An optimized procedure is proposed, according to the use factor (<jats:italic>U<\/jats:italic>) of the secondary wall to be measured.<\/jats:p>","DOI":"10.1088\/2057-1976\/ad2e34","type":"journal-article","created":{"date-parts":[[2024,2,28]],"date-time":"2024-02-28T22:26:25Z","timestamp":1709159185000},"page":"035001","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["On methods for radiometric surveying in radiotherapy bunkers"],"prefix":"10.1088","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9108-3635","authenticated-orcid":true,"given":"Eduardo","family":"Sergio Santini","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Renato Vasconcellos","family":"de Oliveira","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nozimar do","family":"Couto","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Camila","family":"Salata","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Paulo Ant\u00f4nio","family":"Pereira Leal","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fl\u00e1via Cristina","family":"da Silva Teixeira","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1111-2193","authenticated-orcid":true,"given":"Georgia Santos","family":"Joana","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"266","published-online":{"date-parts":[[2024,3,6]]},"reference":[{"key":"bpexad2e34bib1","doi-asserted-by":"publisher","first-page":"402","DOI":"10.1093\/rpd\/ncp264","article-title":"Radiometric survey of teletherapy treatment rooms in Brazil","volume":"138","author":"de Paiva","year":"2010","journal-title":"Radiat. 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All rights, including for text and data mining, AI training, and similar technologies, are reserved.","name":"copyright_information","label":"Copyright Information"},{"value":"2023-09-14","name":"date_received","label":"Date Received","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2024-02-28","name":"date_accepted","label":"Date Accepted","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2024-03-06","name":"date_epub","label":"Online publication date","group":{"name":"publication_dates","label":"Publication dates"}}]}}