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KMID : 0861420120160010038
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Korean Journal of Nuclear Medicine Technology
2012 Volume.16 No. 1 p.38 ~ p.43
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A Study on the Surface Contamination Level and Spatial Dose Rate Measured from NM Patients-Only Bathroom
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Moon Jae-Seung
Jeong Hyi-Il
Jeong Hae-Seong
Shin Min-Yong
Kim Su-Geun
Park Dae-Seong
Kim Hyun-Ki
Kim Hwa-San
Lee Hyung-Nam
Ahn Byeong-Pil
Lee Dong-Ho
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Abstract
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Purpose: Patients injected with FDG use the bathroom that Measured surface contamination level and spatial dose rate. This study about the effect that result affects workers in same part.
Materials and Methods: Group1 is St. Vincent’ s hospital’s 60case. Group 2 is Bucheon St. Mary’s hospital’s 50case. Last case is lower the average daily number of patients than group 2. Measured time is 8:00, 10:00, 13:00, 15:00 and 17:00. Measured part is 4 point of toilet, basin and wastepaper basket, also measured accumulation dose of toilet during 3 month. Hospitals is installed PET/CT ware surveyed on presence of bathroom that used only by patient and worker has been using the bathroom.
Results: The highest average surface contamination level of toilet is group1(8.38±4.56), but the highest spatial dose rate is group3. Cumulative exposure dose measured by TLD during 3months is St.Vincent’s hospital 0.78 mSv and Bucheon St.Mary’s hospital 0.37 mSv. And result of survey is 16.12% worker using the bathroom.
Conclusions: The more daily number of patient, the higher surface contamination level of bathroom. Especially, wastepaper basket’s surface contamination level is exceed the reference value 4 Bq/cm2. Based on This survey, Bathroom require special attention and proper decontamination.
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KEYWORD
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Patient-only bathroom, Surface contamination level, Spatial dose Late, Cumulative exposure dose
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