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Integrated spatiotemporal assessment of ambient radiation fields in a nuclear medicine department using OSL and time-resolved Geiger-Müller monitoring.

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Τίτλος: Integrated spatiotemporal assessment of ambient radiation fields in a nuclear medicine department using OSL and time-resolved Geiger-Müller monitoring.
Συγγραφείς: Poonak K; Department of Radiological Technology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok 10300, Thailand., Sopapan P; Department of Radiological Technology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok 10300, Thailand., Thongkuam P; Department of Radiological Technology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok 10300, Thailand., Sureeyaphan M; Department of Radiological Technology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok 10300, Thailand., Tanakitchaiyasit L; Department of Radiological Technology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok 10300, Thailand., Sungsriphet N; Department of Radiological Technology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok 10300, Thailand., Awikunprasert P; Department of Radiological Technology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok 10300, Thailand., Parklug P; Department of Radiology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok 10300, Thailand., Tungkasereeruk T; Bureau of Radiation and Medical Devices, Department of Medical Sciences, Ministry of Public Health, Nonthaburi 11000, Thailand.
Πηγή: Journal of radiological protection : official journal of the Society for Radiological Protection [J Radiol Prot] 2026 Sep 25; Vol. 46 (3). Date of Electronic Publication: 2026 Sep 25.
Τύπος έκδοσης: Journal Article
Γλώσσα: English
Στοιχεία περιοδικού: Publisher: IOP Pub. Ltd Country of Publication: England NLM ID: 8809257 Publication Model: Electronic Cited Medium: Internet ISSN: 1361-6498 (Electronic) Linking ISSN: 09524746 NLM ISO Abbreviation: J Radiol Prot Subsets: MEDLINE
Imprint Name(s): Original Publication: [Bristol, UK] : IOP Pub. Ltd., [c1988-
Ιατρικοί όροι (MeSH): Radiation Monitoring*/instrumentation , Radiation Monitoring*/methods , Occupational Exposure*/analysis , Radiation Protection* , Nuclear Medicine* , Nuclear Medicine Department, Hospital* , Optically Stimulated Luminescence Dosimetry*, Humans ; Radiation Dosage ; Spatio-Temporal Analysis
Περίληψη: Occupational radiation protection in nuclear medicine is complicated by ambient radiation fields that vary both spatially and temporally. This variability arises from routine radiopharmaceutical handling and from patients who act as temporary mobile radiation sources after administration. Passive dosimetry provides cumulative information but cannot resolve short-term fluctuations arising during routine operations. This study integrated fixed-location optically stimulated luminescence (OSL) dosimetry with time-resolved Geiger-Müller monitoring to characterise spatial variations in ambient dose equivalent and temporal variations in dose-rate in a clinical nuclear medicine department. Monthly ambient dose equivalent,H*(10), was measured at 34 positions grouped into 14 functional areas across controlled, supervised, and uncontrolled zones, while ambient dose rate was recorded at 1 s intervals during routine working hours (08:00-16:00 h) over four weeks. Location-based estimates of annual effective dose (AED) and excess lifetime cancer risk were derived from the OSL measurements. At the functional-area level, the syringe placement area showed the highest monthlyH*(10) (0.405 mSv month-1), followed by the patient waiting room (0.288 ± 0.214 mSv month-1) and injection room (0.204 ± 0.101 mSv month-1). The patient waiting room also recorded the highest four-week mean dose rate (1.21 ± 0.24µSv h-1). Functional-area AED indicators ranged from 1.18 to 5.30 mSv y-1, reflecting spatial variation in the annualised exposure estimates.H*(10) did not differ significantly among the three zones (p= 0.262), it differed significantly among locations within the controlled zone (p= 0.046). Time-resolved monitoring further revealed transient dose-rate peaks that were not apparent in cumulative dosimetry. Integrated monitoring may provide a more comprehensive basis for spatial prioritization and workflow-informed optimisation of radiation protection.
(© 2026 Society for Radiological Protection. Published on behalf of SRP by IOP Publishing Limited. All rights, including for text and data mining, AI training, and similar technologies, are reserved.)
Contributed Indexing: Keywords: ambient dose equivalent; annualised effective dose; excess lifetime cancer risk; radiation safety
Entry Date(s): Date Created: 20260911 Date Completed: 20260925 Latest Revision: 20260925
Update Code: 20260925
DOI: 10.1088/1361-6498/aea625
PMID: 42727597
Βάση Δεδομένων: MEDLINE
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PubType: Academic Journal
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  Data: Integrated spatiotemporal assessment of ambient radiation fields in a nuclear medicine department using OSL and time-resolved Geiger-Müller monitoring.
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  Data: <searchLink fieldCode="AU" term="%22Poonak+K%22">Poonak K</searchLink>; Department of Radiological Technology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok 10300, Thailand.<br /><searchLink fieldCode="AU" term="%22Sopapan+P%22">Sopapan P</searchLink>; Department of Radiological Technology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok 10300, Thailand.<br /><searchLink fieldCode="AU" term="%22Thongkuam+P%22">Thongkuam P</searchLink>; Department of Radiological Technology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok 10300, Thailand.<br /><searchLink fieldCode="AU" term="%22Sureeyaphan+M%22">Sureeyaphan M</searchLink>; Department of Radiological Technology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok 10300, Thailand.<br /><searchLink fieldCode="AU" term="%22Tanakitchaiyasit+L%22">Tanakitchaiyasit L</searchLink>; Department of Radiological Technology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok 10300, Thailand.<br /><searchLink fieldCode="AU" term="%22Sungsriphet+N%22">Sungsriphet N</searchLink>; Department of Radiological Technology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok 10300, Thailand.<br /><searchLink fieldCode="AU" term="%22Awikunprasert+P%22">Awikunprasert P</searchLink>; Department of Radiological Technology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok 10300, Thailand.<br /><searchLink fieldCode="AU" term="%22Parklug+P%22">Parklug P</searchLink>; Department of Radiology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok 10300, Thailand.<br /><searchLink fieldCode="AU" term="%22Tungkasereeruk+T%22">Tungkasereeruk T</searchLink>; Bureau of Radiation and Medical Devices, Department of Medical Sciences, Ministry of Public Health, Nonthaburi 11000, Thailand.
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  Data: <searchLink fieldCode="JN" term="%228809257%22">Journal of radiological protection : official journal of the Society for Radiological Protection</searchLink> [J Radiol Prot] 2026 Sep 25; Vol. 46 (3). <i>Date of Electronic Publication: </i>2026 Sep 25.
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  Data: <i>Publisher: </i><searchLink fieldCode="PB" term="%22IOP+Pub%2E+Ltd%22">IOP Pub. Ltd </searchLink><i>Country of Publication: </i>England <i>NLM ID: </i>8809257 <i>Publication Model: </i>Electronic <i>Cited Medium: </i>Internet <i>ISSN: </i>1361-6498 (Electronic) <i>Linking ISSN: </i><searchLink fieldCode="IS" term="%2209524746%22">09524746 </searchLink><i>NLM ISO Abbreviation: </i>J Radiol Prot <i>Subsets: </i>MEDLINE
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  Data: Occupational radiation protection in nuclear medicine is complicated by ambient radiation fields that vary both spatially and temporally. This variability arises from routine radiopharmaceutical handling and from patients who act as temporary mobile radiation sources after administration. Passive dosimetry provides cumulative information but cannot resolve short-term fluctuations arising during routine operations. This study integrated fixed-location optically stimulated luminescence (OSL) dosimetry with time-resolved Geiger-Müller monitoring to characterise spatial variations in ambient dose equivalent and temporal variations in dose-rate in a clinical nuclear medicine department. Monthly ambient dose equivalent,H*(10), was measured at 34 positions grouped into 14 functional areas across controlled, supervised, and uncontrolled zones, while ambient dose rate was recorded at 1 s intervals during routine working hours (08:00-16:00 h) over four weeks. Location-based estimates of annual effective dose (AED) and excess lifetime cancer risk were derived from the OSL measurements. At the functional-area level, the syringe placement area showed the highest monthlyH*(10) (0.405 mSv month<superscript>-1</superscript>), followed by the patient waiting room (0.288 ± 0.214 mSv month<superscript>-1</superscript>) and injection room (0.204 ± 0.101 mSv month<superscript>-1</superscript>). The patient waiting room also recorded the highest four-week mean dose rate (1.21 ± 0.24µSv h<superscript>-1</superscript>). Functional-area AED indicators ranged from 1.18 to 5.30 mSv y<superscript>-1</superscript>, reflecting spatial variation in the annualised exposure estimates.H*(10) did not differ significantly among the three zones (p= 0.262), it differed significantly among locations within the controlled zone (p= 0.046). Time-resolved monitoring further revealed transient dose-rate peaks that were not apparent in cumulative dosimetry. Integrated monitoring may provide a more comprehensive basis for spatial prioritization and workflow-informed optimisation of radiation protection.<br /> (© 2026 Society for Radiological Protection. Published on behalf of SRP by IOP Publishing Limited. All rights, including for text and data mining, AI training, and similar technologies, are reserved.)
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