방사성 동위원소를 이용한 핵의학과 검사에서 병동 간호사의 방사선 피폭선량 평가

• 영문명: Evaluation of Radiation Exposure to Nurse on Nuclear Medicine Examination by Use Radioisotope
• 발행기관: 대한핵의학기술학회
• 저자명: 정재훈(Jae Hoon Jeong) 이충운(Chung Wun Lee) 유연욱(Yeon Wook You) 서영덕(Yeong Deok Seo) 최호용(Ho Yong Choi) 김윤철(Yun Cheol Kim) 김용근(Yong Geun Kim) 원우재(Woo Jae Won)
• 간행물 정보: 『핵의학기술』Vol.21 No.1, 44~49쪽, 전체 6쪽
• 주제분류: 의약학 > 방사선과학
• 파일형태: PDF
• 발행일자: 2017.06.30

영문 초록

Purpose Radiation exposure management has been strictly regulated for the radiation workers, but there are only a few studies on potential risk of radiation exposure to non-radiation workers, especially nurses in a general ward. The present study aimed to estimate the exact total exposure of the nurse in a general ward by close contact with the patient undergoing nuclear medicine examinations. Materials and Methods Radiation exposure rate was determined by using thermoluminescent dosimeter (TLD) and optical simulated luminescence (OSL) in 14 nurses in a general ward from October 2015 to June 2016. External radiation rate was measured immediately after injection and examination at skin surface, and 50 cm and 1 m distance from 50 patients (PET/CT 20 pts; Bone scan 20 pts; Myocardial SPECT 10 pts). After measurement, effective half-life, and total radiation exposure expected in nurses were calculated. Then, expected total exposure was compared with total exposures actually measured in nurses by TLD and OSL. Results Mean and maximum amount of radiation exposure of 14 nurses in a general ward were 0.01 and 0.02 mSv, respectively in each measuring period. External radiation rate after injection at skin surface, 0.5 m and 1 m distance from patients was as following; 376.0±25.2, 88.1±8.2 and 29.0±5.8 μSv/hr, respectively in PET/CT; 206.7±56.6, 23.1±4.4 and 10.1±1.4 μSv/hr, respectively in bone scan; 22.5±2.6, 2.4±0.7 and 0.9±0.2 μSv/hr, respectively in myocardial SPECT. After examination, external radiation rate at skin surface, 0.5 m and 1 m distance from patients was decreased as following; 165.3±22.1, 38.7±5.9 and 12.4±2.5 μSv/hr, respectively in PET/CT; 32.1±8.7, 6.2±1.1, 2.8±0.6, respectively in bone scan; 14.0±1.2, 2.1±0.3, 0.8±0.2 μSv/hr, respectively in myocardial SPECT. Based upon the results, an effective half-life was calculated, and at 30 minutes after examination the time to reach normal dose limit in ‘Nuclear Safety Act’ was calculated conservatively without considering a half-life. In oder of distance (at skin surface, 0.5 m and 1 m distance from patients), it was 7.9, 34.1 and 106.8 hr, respectively in PET/CT; 40.4, 199.5 and 451.1 hr, respectively in bone scan, 62.5, 519.3 and 1313.6 hr, respectively in myocardial SPECT. Conclusion Radiation exposure rate may differ slightly depending on the work process and the environment in a general ward. Exposure rate was measured at step in the general examination procedure and it made our results more reliable. Our results clearly showed that total amount of radiation exposure caused by residual radioactive isotope in the patient body was neglectable, even comparing with the natural radiation exposure. In conclusion, nurses in a general ward were much less exposed than the normal dose limit, and the effects of exposure by contacting patients undergoing nuclear medicine examination was ignorable.

목차

서론

대상 및 방법

결과

고찰 및 결론

요약

REFERENCES

키워드

Radiation exposure Non-radiation workers Nurse in a general ward