ESR and TL dosimetry systems: comparative measurements for human phantom

Area of Science:

• Medical Physics
• Dosimetry
• Radiological Science

Background:

• Accurate radiation dosimetry is crucial for radiotherapy and radiation protection.
• Tooth enamel can serve as a passive dosimeter for retrospective dose assessment.
• Thermoluminescence (TL) and Electron Spin Resonance (ESR) are established methods for radiation dosimetry.

Purpose of the Study:

• To compare the effectiveness of TL dosimetry and ESR spectroscopy in measuring absorbed doses in tooth enamel.
• To evaluate the impact of scattered irradiation on dose measurements.
• To assess the feasibility of using tooth enamel as a dosimeter in a simulated human head environment.

Main Methods:

• Tooth enamel fragments and TL dosimeters were placed in a human head phantom.
• Irradiation was performed using low dose-rate 137Cs gamma sources in air and behind a water tank to simulate scattered radiation.
• Absorbed doses in enamel were measured using ESR spectroscopy, and TL dosimeters were read using a calibrated TL reader.

Main Results:

• Comparative data on absorbed dose measurements using ESR in enamel and TL dosimetry were obtained.
• The study investigated dose estimations under conditions with and without scattered irradiation.
• Preliminary dose evaluations using ESR were performed on enamel samples prior to the main experiment.

Conclusions:

• Both ESR and TL dosimetry methods provide valuable data for absorbed dose assessment in tooth enamel.
• The study highlights the importance of considering scattered radiation in dosimetry assessments.
• Tooth enamel demonstrates potential as a dosimetric material in complex irradiation scenarios.