An injectable dosimeter for small animal irradiations.

Area of Science:

• Radiation dosimetry
• Small animal models
• Biomedical research

Background:

• Accurate radiation dose measurement is critical for animal model studies.
• Small animal dosimetry presents challenges, especially with protracted and non-uniform radiation fields.
• Existing methods may not fully capture individual mouse dose variations in mobile, inhomogeneous fields.

Purpose of the Study:

• To develop and validate a novel in vivo dosimeter for small animal radiation studies.
• To enable precise dose validation for individual mice in protracted, non-uniform irradiation scenarios.
• To improve the accuracy and reliability of dosimetry in preclinical research.

Main Methods:

• Development of a novel in vivo dosimeter using glass-encapsulated TLD rods.
• Injection of encapsulated TLD rods into mice for direct dose measurement.
• Validation of the dosimeter in a protracted irradiation scenario with inhomogeneous radiation fields.
• Dose reconstruction and comparison with nominal delivered doses.

Main Results:

• The novel in vivo dosimeter demonstrated reliable dose reconstruction capabilities.
• Measured doses were within 10% of the nominal delivered dose across 30 irradiated mice.
• The encapsulated TLD rods proved effective for in vivo dosimetry in moving mice within inhomogeneous fields.

Conclusions:

• The developed encapsulated TLD rod dosimeter offers a reliable method for in vivo small animal dosimetry.
• This technology enhances the accuracy of dose validation in protracted and non-uniform radiation exposures.
• The findings are significant for improving the precision and reproducibility of radiation research using animal models.