Surface loop resonator design for in vivo EPR tooth dosimetry using finite element analysis

Area of Science:

• Medical Physics
• Biophysics
• Materials Science

Background:

• Electron paramagnetic resonance (EPR) tooth dosimetry offers a method for retrospective dose assessment.
• Accurate dosimetry requires optimized resonator design and precise positioning for in vivo measurements.

Purpose of the Study:

• To evaluate and design L-band surface loop resonators for in vivo EPR tooth dosimetry using finite element analysis.
• To investigate the impact of resonator positioning on measurement sensitivity and dose estimation accuracy.

Main Methods:

• Utilized finite element analysis (FEA) to model and simulate L-band surface loop resonators.
• Examined various resonator configurations and their performance in simulated oral environments.
• Analyzed the sensitivity of EPR signal detection to the loop resonator's position relative to molar teeth.

Main Results:

• FEA provides a practical approach for systematic evaluation and design of EPR resonators.
• Resonator sensitivity is significantly influenced by its positioning within the oral cavity.
• Sensitivity to loop position decreases as the resonator is moved further along a row of molars.

Conclusions:

• Finite element analysis is a valuable tool for optimizing EPR resonator design for tooth dosimetry.
• Careful consideration of resonator placement is crucial for enhancing the precision of in vivo EPR dose estimates.
• The study demonstrates a method to improve the reliability of EPR dosimetry in dental applications.