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Published on: August 15, 2018
Emergency Dose Estimation Using Optically Stimulated Luminescence from Human Tooth Enamel.
Radiation Measurements
|September 28, 2011
Summary
Human teeth can serve as emergency Optically Stimulated Luminescence (OSL) dosimeters for radiation dose assessment. This method can detect low radiation doses within 24 hours, crucial for medical triage.
Area of Science:
- Medical Physics
- Radiation Dosimetry
- Biomaterials
Background:
- Optically Stimulated Luminescence (OSL) is a method for measuring absorbed radiation dose.
- Human teeth possess mineralized structures that may retain a dosimetric signal.
- Developing novel, accessible dosimetry methods is critical for radiation incident response.
Purpose of the Study:
- To investigate the feasibility of using human teeth as emergency Optically Stimulated Luminescence (OSL) dosimeters.
- To assess the sensitivity, variability, and signal fading characteristics of tooth OSL.
Main Methods:
- Utilized multiple human teeth samples with a custom-built sensitive OSL reader.
- Exposed teeth to known doses of (60)Co-equivalent radiation, X-ray, beta, and UV.
- Analyzed OSL signal intensity, decay curves, and fading characteristics.
Main Results:
- Measured (60)Co-equivalent doses as low as 27 mGy immediately after exposure.
- Determined a 53% inter-individual variability in OSL sensitivity.
- Observed distinct OSL curve shapes for different radiation types (X-ray/beta vs. UV).
- Characterized typical OSL signal fading with fast (12 min) and slow (14 h) components.
Conclusions:
- Human teeth are viable emergency OSL dosimeters for radiation dose assessment.
- The developed OSL technique meets medical triage requirements for detection within 24 hours post-exposure.
- Further research may refine tooth OSL dosimetry for broader applications.
