A PRACTICAL APPROACH TO PERFORM THE ISOTROPY TEST FOR EXTREMITY DOSEMETERS

Area of Science:

• Medical Physics
• Radiation Dosimetry
• Nuclear Safety

Background:

• Evolving requirements for extremity dosemeter performance over the last decade.
• The Spanish Nuclear Safety Council (CSN) adopted a national protocol in 2010 based on ISO 12794.
• Challenges in isotropy testing due to the asymmetry of ISO 4037-3 calibration phantoms.

Purpose of the Study:

• To propose and validate a practical method to simplify the isotropy test for extremity dosemeters.
• To reduce the number of irradiations required for dosemeter performance evaluation.
• To assess compliance with ISO 12794 requirements for extremity dosemeters.

Main Methods:

• Development of a simplified irradiation protocol for the isotropy test.
• Validation of the proposed method using wrist and ring dosemeters.
• Comparison of results against ISO 12794 performance criteria.

Main Results:

• The proposed practical approach effectively reduces the number of necessary irradiations.
• Wrist and ring dosemeters evaluated in this study meet the ISO 12794 requirements for the isotropy test.
• The study confirms the suitability of the tested dosemeters under the current national protocol.

Conclusions:

• The validated practical approach offers an efficient solution for extremity dosemeter isotropy testing.
• Current extremity dosemeters meet established ISO 12794 standards for isotropy.
• Further investigation is recommended to ensure alignment with the newer IEC 62387 Standard.