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KMID : 1151820210150070957
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Journal of the Korean Society of Radiology
2021 Volume.15 No. 7 p.957 ~ p.964
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Analysis on Fluorine-18 Shielding Efficiency of Double Shield Apron using Acrylic
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Lee Gwon-Seong
Jeon Yeo-Ryeong
Kim Yong-Min
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Abstract
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Fluorine-18 used in PET/CT scans is a radioactive isotope that emits positrons, and high energy annihilation gamma rays and beta rays cause exposure to radiation workers. In this study, as part of a plan to reduce the exposure dose of radiation workers working in the Department of Nuclear Medicine, the cause of the low shielding efficiency of Apron for F-18 was identified, and the effectiveness of the Apron double-shielded with acrylic was evaluated. L-Block, Apron+acrylic, Apron, Acrylic+Apron, and Acrylic five shields are used to measure the dose, and the tendencies were compared by performing a Monte Carlo simulation. As a result, it was found that the shielding rate of Apron double shielded with acrylic was about 4 to 8% higher than that of Apron single shielded. To the extent that it does not significantly affect the user's activity, double-shielded personal protective clothing with an appropriate acrylic thickness could help reduce radiation workers' exposure.
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KEYWORD
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PET/CT , F-18 , Double-shielded Apron , Shielding efficiency , Dose reduction
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