Comparison of sample preparation and signal evaluation methods for EPR analysis of tooth enamel

In dose reconstruction by EPR dosimetry with teeth various methods are appl ied to prepare tooth enamel samples and to evaluate the dosimetric signal. A comparison of seven frequently used methods in EPR dosimetry with tooth e namel was performed. The participating Institutes have applied their own pr ocedure to prepare tooth enamel samples and to evaluate the dosimetric sign al. The precision of the EPR measurement and the dependence of the estimate d dosimetric signal with irradiation up to 1000 mGy were compared. The obta ined results are consistent among the different methods. The reproducibilit y of the dosimetric signal and its estimated relation with the absorbed dos e was found to be very close for the applied methods with one possible exce ption. (C) 2000 Elsevier Science Ltd. All rights reserved.