Estimation of radiation levels by EPR measurement of tooth enamel in Indian populations.
Enamel from 34 molars from 22 individuals in the general population are used to evaluate the background radiation in six cities in India. The estimation of the background dose for each tooth is evaluated using two EPR methods: the calibration-curve method and the additive-dose method. The variation of the estimated EPR dose with tooth position is investigated by using eight teeth taken from the same person. Contribution of the dental X-ray treatments to the enamel-absorbed dose was evaluated using another 17 teeth exposed from 1 to 10 times.
El-Faramawy
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GSF-National Research Center for Environment and Health, Institute for Radiation Protection, D-85758 Neuherberg, Germany. na_bil@yahoo.com
D000328:Adult; D001417:Background Radiation; D001822:Body Burden; D003743:Dental Enamel / Q000737:chemistry* / Q000528:radiation effects*; D004307:Dose-Response Relationship, Radiation; D004578:Electron Spin Resonance Spectroscopy / Q000379:methods*; D006801:Humans; D066298:In Vitro Techniques; D007194:India / Q000453:epidemiology; D008875:Middle Aged; D008963:Molar / Q000737:chemistry* / Q000528:radiation effects*; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000379:methods; D011874:Radiometry / Q000379:methods*; D012062:Relative Biological Effectiveness; D015203:Reproducibility of Results; D012189:Retrospective Studies; D018570:Risk Assessment / Q000379:methods*; D012680:Sensitivity and Specificity; D014965:X-Rays