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| The exposure dose to PET/CT technologists |
| LI Weiguo1, YANG Guo-ren2, LI Quan-tai1, LI Hai-liang1, SUN Ai-jun3 |
| The Radiation Medical Institute, Shandong Academy of Medical Sciences. Meidicine and life sciences college, Shandong Academy of Medical Sciences, Jinan University, Jinan 250062 China |
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Abstract Objective We conduct a field survey to measure the radiation dose of technologists for preparing and administrating radiopharmaceuticals in PET/CT facilities,these work may contribute to protective design for PET facility or a prospective state radioactive protection standards. Method Common TLDs are tied to thorax or necklace of technologists to monitor the total or thyroid dose; and ring TLDs are fixed on both index fingers for hand dose. Assembled and measured all these TLDs each month in half year. Additionally,we mesure and compare the dose values of TLDs attached inside the lead with that of outside. Results The PET/CT technologists received relatively abundant exposure and account for 64%~94% of the collective dose in their facilities; their thyroid dose is in the range of 1.20~1.70 mSv/a,even some technologists' hand dose exceed 500mSv/a; Lead clothing reduces the average dose by 8%. Conclusion Technologists in PET/CT facilities are the major exposed population,they need to take more measures to reduce the dose,in particularly the hand dose.
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Received: 06 February 2012
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