The second international intercomparison on EPR tooth dosimetry

Wieser, A.; Mehta, K.; Amira, Sami; Aragno, D.; Bercea, S.; Брик, А. Б.; Bugaǐ, A. A.; Callens, Freddy; Chumak, Vadim; Ciesielski, B.; Debuyst, René; Dubovsky, S.; Duliu, Octavian G.; Fattibene, P.; Haskell, E.H.; Hayes, Robert B.; Ignatiev, E.A.; Ivannikov, A.I.; Кириллов, В.В.; Kleschenko, E.; Nakamura, Nori; Nather, M.; Nowak, Jakub; Onori, S.; Pass, Barry; Pivovarov, S.; Romanyukha, A.; Scherbina, O.; Shames, Alexander I.; Sholom, S.; Скворцов, В. Г.; Stepanenko, Valeriy; Tikounov, D.; Toyoda, Shin

doi:10.1016/s1350-4487(00)00060-3

Cited by 101 publications

(30 citation statements)

References 22 publications

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“…Several international intercomparisons were undertaken in the past years, in which blind tests were performed in a varying number of laboratories (from 9 to 18) (Chumak et al, 1996a;Wieser et al, 2000b;Wieser et al, 2000c;Wieser et al 2005;Wieser et al, 2006a;Hoshi et al, 2007;Ivannikov et al, 2007;Chapter 1). Four of these intercomparisons were performed in the framework of EU-sponsored projects (Chumak et al, 1996a;Wieser et al, 2000b;Wieser et al, 2000c;Wieser et al 2005), and three of them had numeric titles, i.e., the 1st (Chumak et al, 1996a), the 2nd (Wieser et al, 2000c) and the 3rd Wieser et al, 2006a).…”

Section: International Intercomparisons and "Blind" Testsmentioning

confidence: 99%

“…Four of these intercomparisons were performed in the framework of EU-sponsored projects (Chumak et al, 1996a;Wieser et al, 2000b;Wieser et al, 2000c;Wieser et al 2005), and three of them had numeric titles, i.e., the 1st (Chumak et al, 1996a), the 2nd (Wieser et al, 2000c) and the 3rd Wieser et al, 2006a). Another intercomparison is commonly called "Semipalatinsk Intercomparison" because one of its goals was to collectively measure doses to teeth of residents of the Semipalatinsk region (Chapter 18) Ivannikov et al, 2007).…”

Section: International Intercomparisons and "Blind" Testsmentioning

confidence: 99%

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EPR dosimetry with tooth enamel: A review

Fattibene

Callens

2010

Applied Radiation and Isotopes

208

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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Section: International Intercomparisons and "Blind" Testsmentioning

confidence: 99%

Section: International Intercomparisons and "Blind" Testsmentioning

confidence: 99%

EPR dosimetry with tooth enamel: A review

Fattibene

Callens

2010

Applied Radiation and Isotopes

208

160

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“…Several dose assessment methods have been proposed in the past, an additive dose method, a partial calibration method, and the use of a universal calibration curve (standard dose response curve) [51]. The additive dose method is based on sample response to an additional dose.…”

Section: Epr Dosimetrymentioning

confidence: 99%

“…These include deconvolution, spectrum subtraction, selective saturation, and second derivative methods [51,55]. The deconvolution method uses mathematical approximation of EPR signals using the first least-square technique or the second approximation routine, which is based on the multivariate statistical decomposition method [1,56].…”

Section: Epr Dosimetrymentioning

confidence: 99%

Study of EPR/ESR Dosimetry in Fingernails as a Method for Assessing Dose of Victims of Radiological Accidents/Incidents

Reyes¹

2008

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The threat of nuclear terrorism and the potential for the use of radiation as a weapon make having an efficient and accurate radiation dosimetry methodology paramount. This study gives a physical/mechanical explanation to the behavior of EPR signals in fingernail dosimetry by modeling fingernails as sponges. Since previous work was performed using stressed (untreated) samples, they do not represent the realistic behavior of unstressed (treated) fingernails. The developed treatment eliminates the combined effect of the mechanical EPR signals, MIS1 (former MIS), and MIS2 (former BKS). As nail samples are physically restored with treatments, are not stressed, and display a response closer to that of in vivo specimens. The RIS is proportional to the radiation dose and shows a curvilinear dose response in unstressed samples using the additive dose method that can be modeled with a saturating exponential model (Grun model) for predicting residual or accidental radiological dose.Water content and mechanical stress were identified as the major factors affecting radiation sensitivity and its shape in fingernail EPR measurements respectively. It is proposed that treated samples be used in fingernail EPR dosimetry because they show more stable signals than untreated ones and have lower interpersonal and intrapersonal variability. Practical conditions of sample collection, preparation, and measurements at an accident site can be met with techniques illustrated in this study.v

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“…A significant number of laboratories around the world have set up this method by developing specific protocols of measurement. Since 1996 several international comparison programmes of EPR tooth dosimetry have been devised to assess the state of the art, and disseminate the expertise among laboratories (Chumak et al, 1996;Wieser et al, 2000Wieser et al, , 2005Wieser et al, , 2006bHoshi et al, 2007;Ivannikov et al, 2007). Regardless of their design, these inter-laboratory comparisons were all aimed at examining the capability of the participating laboratories to assess an unknown dose delivered to teeth.…”

Section: Introductionmentioning

confidence: 99%

The 4th international comparison on EPR dosimetry with tooth enamel

Fattibene

Wieser

Adolfsson

et al. 2011

Radiation Measurements

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This paper presents the results of the 4th International Comparison of in vitro electron paramagnetic resonance dosimetry with tooth enamel, where the performance parameters of tooth enamel dosimetry methods were compared among sixteen laboratories from all over the world. The participating laboratories were asked to determine a calibration curve with a set of tooth enamel powder samples provided by the organizers. Nine molar teeth extracted following medical indication from German donors and collected between 1997 and 2007 were prepared and irradiated at the Helmholtz Zentrum München. Five out of six samples were irradiated at 0.1, 0.2, 0.5, 1.0 and 1.5 Gy air kerma; and one unirradiated sample was kept as control. The doses delivered to the individual samples were unknown to the participants, who were asked to measure each sample nine times, and to report the EPR signal response, the mass of aliquots measured, and the parameters of EPR signal acquisition and signal evaluation. Critical dose and detection limit were calculated by the organizers on the basis of the calibration-curve parameters obtained at every laboratory. For calibration curves obtained by measuring every calibration sample three times, the mean value of the detection limit was 205 mGy, ranging from 56 to 649 mGy. The participants were also invited to provide the signal response and the nominal dose of their current dose calibration curve (wherever available), the critical dose and detection limit of which were also calculated by the organizers..

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The second international intercomparison on EPR tooth dosimetry

Cited by 101 publications

References 22 publications

EPR dosimetry with tooth enamel: A review

EPR dosimetry with tooth enamel: A review

Study of EPR/ESR Dosimetry in Fingernails as a Method for Assessing Dose of Victims of Radiological Accidents/Incidents

The 4th international comparison on EPR dosimetry with tooth enamel

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