The Korean Journal of Nuclear Medicine Technology (핵의학기술)
- Volume 16 Issue 2
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- Pages.12-17
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- 2012
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- 1229-9901(pISSN)
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- 2982-8406(eISSN)
The Evaluation on Reuse Period of Patient's Clothes and Sheet After Radioiodine Therapy
방사성 요오드 치료환자의 환의 및 시트에 대한 재사용주기 평가
- Kim, Yeong Seon (Department of Nuclear Medicine, Dankook University Hospital) ;
- Seo, Myung Deok (Department of Nuclear Medicine, Dankook University Hospital) ;
- Lee, Wan Kyu (Department of Nuclear Medicine, Dankook University Hospital) ;
- Kim, Ki Joon (NAC) ;
- Song, Jae Beom (Department of Nuclear Medicine, Dankook University Hospital)
- Received : 2012.07.20
- Accepted : 2012.09.27
- Published : 2012.10.27
Abstract
Purpose : The patient's clothes and sheet after radioiodine therapy must be disposed of by related regulation. That must be disposed of as radioactive wastes, but that is reusing after radioactivity decay by keeping for the certain period of time. In general, The minimum storage period calculate by standard of take radioactive substance out of radiation controlled area based on measured surface contamination level. But the measurements of surface contamination level are able to differ by measurement method. In this paper, I wish to calculate the minimum storage period of patient's clothes and sheet after radioiodine therapy by measure nuclide concentration offered by the regulation on self-disposal of radioactive wastes. Materials and Methods : The whole area of patient's clothes and sheet measured 31 patients(male:9 patients, female:22 patients), who had radioiodine therapy(3.7 GBq:13 patients, 5.55 GBq:16 patients, 7.4 GBq:2 patients) from july 2011 to march 2012. The minimum storage period is calculated by the regulation on self-disposal of radioactive waste(100 Bq/g) and standard of take radioactive substance out of radiation controlled area(4 kBq/m2) Results : The minimum storage period of pillow sheet, upper uniform, lower uniform by standard of take radioactive substance out of radiation controlled area were each 4.6 days, 63days, 78 days. The minimum storage period of pillow sheet, upper uniform, lower uniform by the regulation on self-disposal of radioactive waste were each 18.1 days, 43 days, 62 days. Conclusion : We can verify that patient's clothes and sheet after radioiodine therapy exists a great deal of radioactive contamination. The minimum storage period calculation of patient's clothes and sheet is better suited to applying nuclide concentration offered by the regulation on self-disposal of radioactive waste. I recommend, To keep for at least 2 months of the patient's clothes and sheet contaminated radioactivity, for prevent contamination and unnecessary radiation exposure.
방사성 요오드 치료병실에서 나온 환의 및 시트는 본디 방사성폐기물로서 관련 규정에 따라 일반 쓰레기와 동일하게 처리해야 하지만 사정상 일정기간 보관하여 방사능을 감쇄시킨 후 재사용하게 된다. 통상 최소보관기간 산출에 표면오염도(Bq/