| An analysis of the regulatory program of quality audits in radiotherapy in Brazil from 1995 to 2007. | |
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MedLine Citation:
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PMID: 21587175 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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The Brazilian Institute of Radiation Protection and Dosimetry (IRD/CNEN) carried out quality assurance regulatory audits in Brazilian radiotherapy facilities from 1995 to 2007. In this work, the set of data collected from 195 radiotherapy facilities that use high-energy photon beams are analyzed. They include results from audits in linear electron accelerators and/or Co-60 units. The inspectors of IRD/CNEN performed the dosimetry of high-energy radiotherapy photon beams according to the IAEA dosimetry protocols TRS 277 and TRS 398, and the values of measurements were compared to stated values. Other aspects of radiological protection were checked during on-site audits such as calibration certification of clinical dosimeters and portable monitors, existence and use of check source, use of barometer and thermometer, individual dose registry and training of staff. It was verified that no check source was available in 38% of the visited facilities; the training of personnel was not adequate in 9% of the facilities and the registry of accumulated individual doses was not being done in 6% of the facilities. Measurements of absorbed dose have indicated deviations in the range ± 3% for 67.6% of the cobalt-60 units and 79.6% of medical linear accelerators; 18.5% of Co-60 irradiators and 9.6% of linear accelerators presented deviations in the range 3% < δ ≤ 5%. Finally, 13.9% of Co-60 facilities and 10.8% of linear accelerator facilities presented dosimetry deviations above 5%. The effort in dosimetric quality control performed by IRD/CNEN audits has yielded positive changes that make radiation treatment facilities more reliable. |
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Authors:
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Eduardo De Paiva; Luiz A R Da Rosa; Ricardo R A Brito; Lidia V De Sá; Ana C M Dovales; Delano V S Batista; Ricardo A Giannoni; Alexandre F Velasco |
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Publication Detail:
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Type: Journal Article Date: 2011-01-30 |
Journal Detail:
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Title: Journal of applied clinical medical physics / American College of Medical Physics Volume: 12 ISSN: 1526-9914 ISO Abbreviation: J Appl Clin Med Phys Publication Date: 2011 |
Date Detail:
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Created Date: 2011-05-18 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101089176 Medline TA: J Appl Clin Med Phys Country: United States |
Other Details:
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Languages: eng Pagination: 3330 Citation Subset: IM |
Affiliation:
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Instituto de Radioproteção e Dosimetria - IRD/CNEN. epaiva@ird.gov.br. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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