Differences in the Radiation Sensitivity of Human Tooth Enamel in an Individual and among the Individuals in Dental ESR Dosimetry.

Iwasaki, Midori; Miyazawa, Chyuzo; Uesawa, Teruo; Itoh, Ichizoh; Niwa, Katsumi

doi:10.3769/radioisotopes.44.11_785

Cited by 21 publications

(4 citation statements)

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“…Slight differences in carbonate content, crystal dimensions or other chemical and physical properties of tooth enamel may induce variations in the radiation sensitivity not only among tooth samples of different individuals, but also among enamel samples from the same person. Iwasaki et al (1995) reported that sensitivities of enamel from different persons varied by less than 10%, which was comparable with the variation in the sensitivity of teeth of the same individual.…”

Section: Parameters Affecting the Sensitivity Of Tooth Enamel To Radisupporting

confidence: 54%

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: Parameters Affecting the Sensitivity Of Tooth Enamel To Radisupporting

confidence: 54%

EPR dosimetry with tooth enamel: A review

Fattibene

Callens

2010

Applied Radiation and Isotopes

208

160

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“…These radicals are EPR detectable and their concentration is proportional to the absorbed dose. However, tooth enamel needs to be separated from dentine before dose estimation due to the following reasons; To avoid inter tooth variation in EPR signal caused by heterogeneous distribution of dentine [ 21 , 22 ]. To use pooled enamel samples for dosimetry and epidemiological studies [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

“…To avoid inter tooth variation in EPR signal caused by heterogeneous distribution of dentine [ 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic and dosimetric comparison of tooth enamel separation methods for EPR retrospective dosimetry

Panda,

Joshi,

Annalakshmi

et al. 2024

Heliyon

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“…5) Intensity of ESR signals has been related to dose accumulated in tooth enamel. [6][7][8][9][10] Individual dose reconstruction, however, ultimately requires doses to organs of interest, while ESR dosimetry determines just tooth enamel dose. The enamel dose, therefore, was quantitatively related to organ doses by Monte Carlo calculations using a modified MIRD-type phantom with a newly defined teeth region against external photon exposure.…”

Section: Introductionmentioning

confidence: 99%

Conversion from Tooth Enamel Dose to Organ Doses for Electron Spin Resonance Dosimetry.

Takahashi

Yamaguchi

Iwasaki

et al. 2002

J. Nucl. Sci. Technol.

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Conversion from tooth enamel dose to organ doses was analyzed to establish a method of retrospective individual dose assessment against external photon exposure by electron spin resonance (ESR) dosimetry. Dose to tooth enamel was obtained by Monte Carlo calculations using a modified MIRD-type phantom with a teeth part. The calculated tooth enamel doses were verified by measurements with thermo-luminescence dosimeters inserted in a physical head phantom. Energy and angular dependences of tooth enamel dose were compared with those of other organ doses. Additional Monte Carlo calculations were performed to study the effect of human model on the tooth enamel dose with a voxel-type phantom, which was based on computed tomography images of the physical phantom. The data derived with the modified MIRD-type phantom were applied to convert from tooth enamel dose to organ doses against external photon exposure in a hypothesized field, where scattered radiation was taken into account. The results indicated that energy distribution of photons incident to a human body is required to evaluate precisely an individual dose based on ESR dosimetry for teeth.

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Differences in the Radiation Sensitivity of Human Tooth Enamel in an Individual and among the Individuals in Dental ESR Dosimetry.

Cited by 21 publications

References 0 publications

EPR dosimetry with tooth enamel: A review

EPR dosimetry with tooth enamel: A review

Spectroscopic and dosimetric comparison of tooth enamel separation methods for EPR retrospective dosimetry

Conversion from Tooth Enamel Dose to Organ Doses for Electron Spin Resonance Dosimetry.

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