An in vitro L-band electron paramagnetic resonance study of highly irradiated whole teeth

M. Zdravkova, A. Wieser, N. El-Faramawy, B. Gallez, R. Debuyst, Y. S. Horowitz, L. Oster

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Regarding in vivo L-band dosimetry with human teeth, a number of preliminary experiments were carried out that were linked to the resonators' response and the relative contribution of enamel to the EPR signal intensity of irradiated whole teeth. The sensitivity of the extended loop resonator varies in the antenna plane, but this variation tends to vanish when the sample is moved away from this plane. When the loop antenna is placed just above the highly irradiated molar, around 88% of the dosimetric signal is due to the crown enamel. The sensitivity inside a birdcage cavity is approximately equal over the volume of a molar; only 30% of the molar's total dosimetric signal results from enamel. Some decrease in the intensity of the dosimetric signal from enamel is observed after irradiation. At room temperature, the signal is reduced by about 20% within 90 days and approaches a plateau with a time constant of about 35 days.

Original languageEnglish
Pages (from-to)497-502
Number of pages6
JournalRadiation Protection Dosimetry
Volume101
Issue number1-4
DOIs
StatePublished - 1 Jan 2002

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