Performance Characteristics of a New Automatic Chip TLD Reader

Area of Science:

• Medical Physics
• Radiation Dosimetry
• Instrumentation Science

Background:

• Implementing a Quality Management System (QMS) is crucial for dosimetry laboratories, as per International Atomic Energy Agency (IAEA) guidelines.
• Accurate and reliable Thermoluminescent Dosimeter (TLD) readers are essential for consistent radiation measurement in various applications.
• The TR5500 TLD reader was developed in Iran for automated readout of TL chips and pellets.

Purpose of the Study:

• To evaluate the performance characteristics of the TR5500 TLD reader.
• To assess its compliance with international standards for dosimetry equipment.
• To confirm its suitability for routine use in accredited dosimetry laboratories.

Main Methods:

• LiF: Mg, Cu, P TLDs were irradiated in a standard photon radiation field.
• The TR5500 reader was used to measure the thermoluminescent response of the TLDs.
• Key performance metrics including non-linearity, Coefficient of Variation (COV), stability, and reproducibility were calculated.
• Results were compared against International Electrotechnical Commission (IEC) and American Society for Testing and Materials (ASTM) standards (e.g., ASTM E668-10, IEC 62387).

Main Results:

• The TR5500 TLD reader demonstrated excellent readout stability and reproducibility.
• The reader met or exceeded key performance criteria specified by international standards.
• Non-linearity and COV values were within acceptable limits for accredited dosimetry.

Conclusions:

• The TR5500 TLD reader is a reliable and robust instrument for automated thermoluminescent dosimetry.
• Its performance validates its suitability for routine use in accredited dosimetry laboratories.
• The reader contributes to ensuring accurate radiation measurements in compliance with international standards.