A COMPARATIVE STUDY OF EYE LENS RADIATION DOSE BETWEEN DIRECT NANODOT OSL MEASUREMENT AND HP(3) ESTIMATION FROM OSL IN PERSONNEL AT SONGKLANAGARIND VASCULAR CENTER

Abstract

This study aimed to: 1) compare eye lens radiation doses measured directly with nanoDot OSL dosimeters and estimated Hp(3) values from body-worn OSL dosimeters among interventional radiology personnel, 2) investigate the correlation between nanoDot OSL measurements and Hp(3) estimations, and 3) evaluate the eye lens radiation dose of personnel in comparison with the dose limits recommended by the ICRP. This research employed a retrospective analytical design. The study population included staff at the Songklanagarind Vascular Center between 2020 and 2021. The sample consisted of 20 eligible participants, comprising neuro-interventional radiologists, body-interventional radiologists, nurses, and radiologic technologists. The instruments used were three sets of OSL dosimeters positioned at: inside the lead apron, outside the lead apron, and nanoDot OSL affixed to lead glasses for direct eye lens dose measurement. Data collection relied on retrospective records of individual occupational dosimetry and radiation dose reports provided by the Thailand Institute of Nuclear Technology. Statistical analyses included descriptive statistics, Pearson correlation coefficient, linear regression, and one-way analysis of variance (ANOVA). Key findings revealed that Hp(3) estimations were approximately 2–3 times higher than direct nanoDot measurements, though they demonstrated a moderate positive correlation (r ≈ 0.5, p < 0.05). Interventional radiologists received the highest eye lens doses, while nurses and radiologic technologists received significantly lower doses. Importantly, all measured radiation doses remained well below the ICRP annual limit of 20 mSv.