Complex experimental research on internal tooth dosimetry for the Techa River region: A model for 90Sr accumulation in human teeth formed by time of intakes

Tikunov, D.D.; Ivannikov, A.I.; Shishkina, E.A.; Petin, D.V.; Borysheva, N.B.; Orlenko, S.P.; Nalapko, M.; Shved, Valentina A.; Скворцов, В. Г.; Stepanenko, Valeriy

doi:10.1016/j.radmeas.2005.12.003

Cited by 10 publications

(5 citation statements)

References 30 publications

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“…In 2009, the measured 90 Sr/ 90 Y activity in tooth enamel was 2.1 ± 1.1 Bq/g. The estimated cumulated internal dose was 800 ± 400 mGy, 50 years after uptake of 90 Sr in 1957, calculated with a dose rate coefficient of 0.056 nGy/g/s, assuming only radioactive decay without biological removal of 90 Sr from enamel (Tikunov et al 2006 ), which is close to the measured total absorbed dose in enamel of 1,190 mGy. 90 Sr content below detection limit was found for one tooth (ID 2033) with absorbed dose in enamel of 226 mGy.…”

Section: Resultssupporting

confidence: 64%

Electron paramagnetic resonance measurements of absorbed dose in teeth from citizens of Ozyorsk

Wieser

Vasilenko

Aladova

et al. 2014

Radiat Environ Biophys

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In 1945, within the frame of the Uranium Project for the production of nuclear weapons, the Mayak nuclear facilities were constructed at the Lake Irtyash in the Southern Urals, Russia. The nuclear workers of the Mayak Production Association (MPA), who lived in the city of Ozyorsk, are the focus of epidemiological studies for the assessment of health risks due to protracted exposure to ionising radiation. Electron paramagnetic resonance measurements of absorbed dose in tooth enamel have already been used in the past, in an effort to validate occupational external doses that were evaluated in the Mayak Worker Dosimetry System. In the present study, 229 teeth of Ozyorsk citizens not employed at MPA were investigated for the assessment of external background exposure in Ozyorsk. The annually absorbed dose in tooth enamel from natural background radiation was estimated to be (0.7 ± 0.3) mGy. For citizens living in Ozyorsk during the time of routine noble gas releases of the MPA, which peaked in 1953, the average excess absorbed dose in enamel above natural background was (36 ± 29) mGy, which is consistent with the gamma dose obtained by model calculations. In addition, there were indications of possible accidental gaseous MPA releases that affected the population of Ozyorsk, during the early and late MPA operation periods, before 1951 and after 1960.

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Section: Resultssupporting

confidence: 64%

Electron paramagnetic resonance measurements of absorbed dose in teeth from citizens of Ozyorsk

Wieser

Vasilenko

Aladova

et al. 2014

Radiat Environ Biophys

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“…Further incorporation is mainly due to ion transport between the enamel surface and surrounding fluids. However, Tikunov et al (2006), using low background β−counting, detected non-negligible 90 Sr concentrations in teeth already formed completely by the time of contamination, which suggests that post-eruption uptake of radioisotopes by enamel should not be ignored. Loss of minerals from tooth enamel is attributed mainly to ion diffusion and tooth surface reactions.…”

Section: Epr Response Of Tooth Enamel To Doses From Internal β β β β-mentioning

confidence: 97%

“…When the radioactivity level is sufficiently high, the volume-averaged 90 Sr concentration can be obtained by the traditional in vivo tooth β−counters and in vitro radiochemical methods (Tolstykh et al, 2000); otherwise, it can be measured by a low-background β−counting set, such as used by Tikunov et al (2006). Distribution of the β-emitting radionuclide concentration can be mapped with two methods: thin TLD (Goksu et al, 2002) and photostimulable phosphor imaging plates (Romanyukha et al, 2002b;Shishkina et al, 2002 Sr incorporated in dentine Tolstykh et al 2000), in jaw bone, and tooth enamel itself (Tolstykh et al 2000).…”

Section: A) Measurement Of the Radionuclide Distribution In Tooth Enamentioning

confidence: 99%

EPR dosimetry with tooth enamel: A review

Fattibene

Callens

2010

Applied Radiation and Isotopes

212

160

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When tooth enamel is exposed to ionizing radiation, radicals are formed that can be detected using Electron Paramagnetic Resonance (EPR) techniques. EPR dosimetry using tooth enamel is based on the (presumed) correlation between the intensity or amplitude of some of the radiation-induced signals with the dose absorbed in the enamel. In the present paper a critical review is given of this widely applied dosimetric method.The first part of the paper is quite fundamental and deals with the main properties of tooth enamel and several of its model systems (e.g., synthetic apatites). Considerable attention is also devoted to the numerous radiation-induced and native EPR signals, and the radicals responsible for them. The relevant EPR detection, identification and spectrum analysing methods are reviewed from a general point of view. Finally, the need for solid state modelling and the linearity of the dose response are investigated.The second part is devoted to the practical implementation of EPR dosimetry using enamel. It concerns the preparation of samples, specific irradiation problems, spectrum acquisition and it is described how the dosimetric signal intensity and dose can be retrieved from the EPR spectra. Special attention is paid to the energy dependence of the EPR response and to sources of uncertainties. Results of and problems encountered in international intercomparisons and epidemiological studies are also dealt with.In the final chapter the future of EPR dosimetry with tooth enamel is analysed.

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“…Methods that have been frequently used to measure independently the radioactivity in the tooth are the thermoluminescence-based beta dosimetry (Shishkina et al 2005 ; Veronese et al 2008 ; Shishkina 2012 ), the scintillating detectors (Tikunov et al 2006 ), the measurement of 90 Sr with a whole-body counter or the gas-flow Geiger-Muller detectors (Tolstykh et al 2000 , 2003 ). The absorbed dose to tooth enamel from the internal contamination of radionuclides in the enamel itself or in the nearby tissues, is then estimated by using computational phantoms and dosimetric models (Volchkova et al 2009 ; Ferrari 2010 ; Shishkina et al 2014 ).…”

Section: Retrospective Dosimetry Techniquesmentioning

confidence: 99%

Eurados review of retrospective dosimetry techniques for internal exposures to ionising radiation and their applications

Giussani

López

Romm

et al. 2020

Radiat Environ Biophys

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This work presents an overview of the applications of retrospective dosimetry techniques in case of incorporation of radionuclides. The fact that internal exposures are characterized by a spatially inhomogeneous irradiation of the body, which is potentially prolonged over large periods and variable over time, is particularly problematic for biological and electron paramagnetic resonance (EPR) dosimetry methods when compared with external exposures. The paper gives initially specific information about internal dosimetry methods, the most common cytogenetic techniques used in biological dosimetry and EPR dosimetry applied to tooth enamel. Based on real-case scenarios, dose estimates obtained from bioassay data as well as with biological and/or EPR dosimetry are compared and critically discussed. In most of the scenarios presented, concomitant external exposures were responsible for the greater portion of the received dose. As no assay is available which can discriminate between radiation of different types and different LETs on the basis of the type of damage induced, it is not possible to infer from these studies specific conclusions valid for incorporated radionuclides alone. The biological dosimetry assays and EPR techniques proved to be most applicable in cases when the radionuclides are almost homogeneously distributed in the body. No compelling evidence was obtained in other cases of extremely inhomogeneous distribution. Retrospective dosimetry needs to be optimized and further developed in order to be able to deal with real exposure cases, where a mixture of both external and internal exposures will be encountered most of the times.

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Complex experimental research on internal tooth dosimetry for the Techa River region: A model for 90Sr accumulation in human teeth formed by time of intakes

Cited by 10 publications

References 30 publications

Electron paramagnetic resonance measurements of absorbed dose in teeth from citizens of Ozyorsk

Electron paramagnetic resonance measurements of absorbed dose in teeth from citizens of Ozyorsk

EPR dosimetry with tooth enamel: A review

Eurados review of retrospective dosimetry techniques for internal exposures to ionising radiation and their applications

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