Occupational Radiation Exposure to Fingers Using Thermoluminescent Ring Dosimeters in Healthcare Personnel at AEMCK

Abstract

Abstract Background & Aims:This study at Atomic Energy Medical Centre Karachi (AEMCK), marks the first ever implementation of ring thermoluminescent dosimeters (TLDs) in the year 2020 for extremity dose monitoring of Nuclear Medicine employees. It aimed to assess finger doses during radiopharmaceutical preparation/administration and evaluate compliance with radiation protection standards. Methods:Five Nuclear Medicine technologists (two workers from Hot Laboratory, two from Gamma Camera and one from Stress Laboratory) wore ring TLDs on the dominant hand's index/ring finger base for monthly cycles over the period (2020–2021). Doses measured skin equivalent at Hp(0.07). TLDs calibrated with Cs-137 in a Secondary Standard Dosimetry Laboratory at KANUPP-1. Statistical analysis used Microsoft Excel and t-test distribution. Results: Hot Laboratory staff showed higher mean finger doses (58.79 ± 30.48 mrem) than Gamma/Stress Laboratory staff (18.19 ± 7.30 mrem), with significant difference (p = 0.000238). Maximum monthly dose was 110 mrem. All doses remained well below the 50,000 mrem/year (500 mSv/year) extremity limit. Conclusion: The study highlights the importance of continuous extremity dose monitoring in nuclear medicine practice. All measured doses in different area were within permissible limits, the adoption of protective measures such as syringe shields, short-tubing butterfly cannulas, staff rotation, and simulated training can further optimize safety. For strengthens and promotes a robust radiation safety culture the alignment with regulatory compliance ,International Atomic Energy Agency (IAEA) and Pakistan Nuclear Regulatory Authority (PNRA) ,guidelines must essential.Regular extremity monitoring is strongly recommended across Atomic Energy Cancer Hospitals (AECHs).