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Feasibility of Q-Band EPR Dosimetry in Biopsy Samples of Dental Enamel, Dentine and Bone |
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| Authors: | Tania De Alex Romanyukha Francois Trompier Barry Pass Prabhakar Misra |
| Affiliation: | 1. Department of Physics and Astronomy, Howard University, 2355 6th St. NW, Washington, DC, 20059, USA 2. Uniformed Services University of the Health Sciences, Bethesda, MD, USA 3. Institut de Radioprotection et de S?reté Nucléaire, Fontenay-aux-Roses, France 4. College of Dentistry, Howard University, Washington, DC, USA |
| Abstract: | Electron paramagnetic resonance (EPR) dosimetry of tooth enamel in X-band has been established as a suitable method for individual reconstruction of doses 0.1 Gy and higher. The objective was to demonstrate the feasibility of using Q-band EPR in small biopsy tooth enamel samples to provide accurate measurements of radiation doses. Q-band spectra of small (<10 mg) irradiated samples of dentine and bone were studied to investigate the possibility of using Q-band EPR for dose measurements in those materials if there are limited amounts of enamel available, and there is no time for the chemical sample preparation required for accurate X-band measurements in dental enamel. Our results have shown that Q-band provides accurate measurements of radiation doses higher than 0.5 Gy in tooth enamel biopsy samples as small as 2 mg. Q-band EPR spectra in powdered dentine and bone demonstrated significantly higher resolution and sensitivity than in conventional X-band measurements. |
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