Q-band EPR biodosimetry in tooth enamel microsamples: feasibility test and comparison with x-band
| Autor: | Harold M. Swartz, Alexander Romanyukha, Lyudmila Romanyukha, C.A. Mitchell, David A. Schauer |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Molar
Materials science Epidemiology Health Toxicology and Mutagenesis Dose profile Radiation Radiation Dosage law.invention stomatognathic system Biodosimetry law medicine Dosimetry Humans Radiology Nuclear Medicine and imaging Electron paramagnetic resonance Dental Enamel Radiometry Reproducibility business.industry Electron Spin Resonance Spectroscopy Tooth enamel stomatognathic diseases medicine.anatomical_structure Feasibility Studies Nuclear medicine business Biomedical engineering |
| Zdroj: | Health physics. 93(6) |
| ISSN: | 0017-9078 |
| Popis: | — A comparative study of electron paramagnetic resonance dosimetry in Q- and X-bands has shown that Q-band is able to provide accurate measurements of radiation doses even below 0.5 Gy with tooth enamel samples as small as 2 mg. The optimal amount of tooth enamel for dose measurements in Q-band was found to be 4 mg. This is less than 1% of the total amount of tooth enamel in one molar tooth. Such a small amount of tooth enamel can be harmlessly obtained in an emergency requiring after-the-fact radiation dose measurement. The other important advantage of Q-band is full resolution of the radiation-induced EPR signal from the native, background signal. This separation makes dose response measurements much easier in comparison to conventional X-band measurements in which these overlapping signals necessitate special methods for doses below 0.5 Gy. The main disadvantages of Q-band measurements are a higher level of noise and lower spectral reproducibility than in X-band. The effect of these negative factors on the precision of dose measurements in Q-band could probably be reduced by improvement of sample fixation in the resonance cavity and better optimization of signal filtration to reduce high-frequency noise. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|