科研之友
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摘要
The purpose of this study is to evaluate the effectiveness of personal radiation shields currently worn in hospital and other diagnostic environments. This study was performed with four different radioisotopes; F-18, Tc-99m, I-124 and I-131. F-18 results showed a decrease in dose with 0.5-mm Pb shielding but the reduction provided does not warrant its use clinically. I-124 testing demonstrated that dose enhancement can occur in greater shield thicknesses. PET isotope 124I can be adequately shielded using 0.25-mm Pb equivalent aprons but any higher thickness increase the wearer's dose. As a result more shielding does not always equal more protection. The I-131 test showed that no dose reduction occurred, even when tested with up to 1.25-mm Pb equivalent shielding. Novel radioisotopes being used in the laboratory and clinic should be individually tested as each requires specific shielding testing.
- 出版日期2015-7
