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      Dose absorbed by technologists in positron emission tomography procedures with FDG

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          Abstract

          The objective of this work was to evaluate radiation doses delivered to technologists engaged in different tasks involving positron emission tomography (PET) studies with FDG (fluorodeoxyglucose). This investigation was performed in two French nuclear medicine departments, which presented significant differences in their arrangements and radiation safety conditions. Both centers administered about 300 MBq per PET/CT study, although only one of them is a dedicated clinical PET center. Dose equivalent Hp(10) and skin dose Hp(0.07) were measured using Siemens electronic personnel dosimeters. For assessment dose absorbed by hands during drawing up of tracer and injection into the patient, a Polimaster wristwatch gamma dosimeter was employed. Absorbed dose and the time spent during each investigated task were recorded for a total of 180 whole-body PET studies. In this report, the methodology employed, the results and their radioprotection issues are presented as well as discussed.

          Translated abstract

          O objetivo deste trabalho foi o de avaliar doses absorvidas por profissionais de saúde em diferentes tarefas relacionadas à tomografia por emissão de pósitrons com [18F]-FDG (fluordesoxiglicose). Esta pesquisa foi realizada em dois centros de medicina nuclear na França, os quais apresentavam diferenças significativas em sua organização e radioproteção. Esses centros aplicavam aproximadamente 300 MBq por exame PET/CT, embora apenas um deles correspondesse a um serviço de medicina nuclear dedicado a exames por PET. A dose equivalente (Hp(10)) e a dose na pele Hp(0,07) foram medidas usando dosímetros eletrônicos (Siemens). Para avaliação da dose nas mãos do tecnologista durante a preparação do radiofármaco e durante injeção no paciente, um dosímetro tipo relógio de pulso (Polimaster) foi empregado. A dose absorvida e o tempo empregado durante cada tarefa foram registrados para um total de 180 exames de corpo inteiro através da PET. Neste trabalho, a metodologia empregada, os resultados e suas conseqüências na dose absorvida para o profissional de saúde são apresentados e discutidos.

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          Most cited references15

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          Radiation dose to PET technologists and strategies to lower occupational exposure.

          The use of PET in Australia has grown rapidly. We conducted a prospective study of the radiation exposure of technologists working in PET and evaluated the occupational radiation dose after implementation of strategies to lower exposure.
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            Are MIBI/tetrofosmin heart studies a potential radiation hazard to technologists?

            The number of nuclear medicine studies is increasing and they are becoming more complex and time-consuming. In particular, this is true of myocardial perfusion investigations. We use a one-day protocol for these studies, utilizing 99Tc(m)-MIBI or 99Tc(m)-tetrofosmin with tomographic rest images (250 MBq) acquired in the morning and exercise images (750 MBq) approximately 4 h later after pharmacological stress. Imaging technologists are concerned about continual exposure to 1000 MBq 99Tc(m) per study. Radiation doses were measured during rest (1.0 microSv, n = 18), exercise (2.5 microSv, n = 18) and stress administration (2.0 microSv, n = 16), giving a total dose of 5.5 microSv per combined cardiac study. We have previously shown that the average dose per radionuclide study (excluding myocardial perfusion studies) is 1.5 microSv. Although 5.5 microSv is higher, a technologist is highly unlikely to exceed current dose limits. New EC legislation, however, is expected to reduce these limits, which may lead to more classified workers. Pregnant technologists should avoid, if possible, combined cardiac studies, especially if performing other nuclear medicine duties.
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              Recommendations of the International Commission on Radiological Protection

              ICRP (1991)
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                Author and article information

                Journal
                babt
                Brazilian Archives of Biology and Technology
                Braz. arch. biol. technol.
                Instituto de Tecnologia do Paraná - Tecpar (Curitiba, PR, Brazil )
                1516-8913
                1678-4324
                September 2007
                : 50
                : spe
                : 129-134
                Affiliations
                [01] Recife PE orgnameUniversidade Federal de Pernambuco orgdiv1Departamento de Energia Nuclear orgdiv2Grupo de Estudos em Radioproteção e Radioecologia Brasil
                [02] orgnameIRSN orgdiv1DPHD orgdiv2SDOS France
                [03] Sarcelles orgnameCentre Tep Paris-Nord Roger Perez France
                Article
                S1516-89132007000600016 S1516-8913(07)05000016
                10.1590/S1516-89132007000600016
                9c5c2e4a-db59-4ae3-b292-81bc49c5a204

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 08 August 2007
                : 10 August 2007
                : 31 July 2007
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 15, Pages: 6
                Product

                SciELO Brazil

                Categories
                Radiobiology and Radioprotection

                Radioprotection,Technologists,PET,Electronic Dosimeters
                Radioprotection, Technologists, PET, Electronic Dosimeters

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