Document Detail


Incorporation monitoring of employees of a radioiodine therapy ward - Is incorporation monitoring required for routine? Ist im Routinebetrieb eine Inkorporationsüberwachung erforderlich?
MedLine Citation:
PMID:  23348688     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Aim of the study was to determine the annual incorporation of staff on a radioiodine therapy ward and the resulting annual effective dose (aed). Following the German incorporation guideline (gig), incorporation monitoring is not necessary for potential aed below 0.5 mSv/a. For aed > 0.5 mSv/a adherence to the 1 mSv dose limit must be verified. For doses > 1 mSv/a incorporation has to be monitored by the authority. Furthermore, the 131I incorporation factor from the gig should be verified. Methods: To determine the actual work related incorporation, the 131I activity concentration in urine samples (collection over 24 h) of 14 employees of different professions were examined over a period of 27 months. Results: Measured activity concentrations were related to the individual time of exposure. A constant activity supply for at least three days was assumed. The mean annual effective doses were 2.4 · 10⁻¹ mSv/a (nursing staff; n = 3), 5.6 · 10⁻² mSv/a (cleaning staff; n = 2), 2.8 · 10⁻³ mSv/a (technical staff; n = 2) and 5.2 · 10⁻³ mSv/a (physicians; n = 7). All aed were below the dose limits of the gig. The calculated mean incorporation factors ranged from 3.0 · 10⁻⁸ for the nursing staff to 3.6 · 10⁻¹⁰ for the technical staff (cleaning staff: 7 · 10⁻⁹; physicians: 6.5 · 10⁻¹⁰) and were therefore well below the 131 I incorporation factor defined by the gig. Conclusions: To estimate the aed caused by incorporation of 131 I it has to be subdivided for the different requirements in the diverse fields of activity of the employees. Regarding those who spend most of their time nearby the patient an incorporation monitoring by the authority might be required. The 131 I incorporation factor from the guideline (10⁻⁶) can be reduced by a factor of 10. For 99m Tc and 18 F an incorporation factor of 10⁻⁷ is accepted.
Authors:
C Happel; U Kratzel; I Selkinski; B Bockisch; M Etzel; H Korkusuz; B Sauter; J Staudt; F von Müller; F Grünwald; W T Kranert
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-25
Journal Detail:
Title:  Nuklearmedizin. Nuclear medicine     Volume:  52     ISSN:  0029-5566     ISO Abbreviation:  Nuklearmedizin     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7609387     Medline TA:  Nuklearmedizin     Country:  -    
Other Details:
Languages:  GER     Pagination:  -     Citation Subset:  -    
Affiliation:
Dipl.-Ing. Christian Happel, Klinikum der Johann Wolfgang Goethe Universität, Klinik für Nuklearmedizin, Theodor-Stern-Kai 7, 60590 Frankfurt am Main, Tel. 069/63 01 43 30, Fax 069/63 01 38 58, E-Mail: Christian.Happel@kgu.de, www.nuklearmedizin-unifrankfurt.de.
Vernacular Title:
Überwachung der Mitarbeiter einer Radioiodtherapiestation mittels Ausscheidungsmessungen. Ist im Routinebetrieb eine Inkorporationsüberwachung erforderlich?
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