PET/CT 검사에서 방사선 종사자 피폭선량 저감에 대한 방안 연구

• 영문명: A Study to Decrease Exposure Dose for the Radiotechnologist in PET/CT
• 발행기관: 대한핵의학기술학회
• 저자명: 조석원(Seok Won Cho) 박훈희(Hoon-Hee Park) 김정열(Jung Yul Kim) 반영각(Yung Kak Ban) 임한상(Han Sang Lim) 오기백(Ki Beak Oh) 김재삼(Jae Sam Kim) 이창호(Chang Ho Lee)
• 간행물 정보: 『핵의학기술』Vol.14 No.2, 159~165쪽, 전체 7쪽
• 주제분류: 의약학 > 방사선과학
• 파일형태: PDF
• 발행일자: 2010.10.30

영문 초록

Purpose: Positron emission tomography scan has been growing diagnostic equipment in the development of medical imaging system. Compare to ⁹⁹ᵐTc emitting 140 keV, Positron emission radionuclide emits 511 keV gamma rays. Because of this high energy, it needs to reduce radioactive emitting from patients for radiotechnologist. We searched the external dose rates by changing distance from patients and measure the external dose rates when we used shielder investigate change external dose rates. In this study, the external dose distribution were analyzed in order to help managing radiation protection of radiotechnologists. Materials and Methods: Ten patients were searched (mean age: 47.7±6.6, mean height: 165.5±3.8 cm and mean weight: 65.9±1.4 kg). Radiation were measured on the location of head, chest, abdomen, knees and toes at the distance of 10, 50, 100, 150 and 200 cm. Then, all the procedure was given with a portable radiation shielding on the location of head, chest and abdomen at the distance of 100, 150 and 200 cm and transmittance was calculated. Results: In 10 cm, head (105.40 μSv/h) was the highest and foot (15.85 μSv/h) was the lowest. In 200 cm, head, chest and abdomen showed similar. On head, the measured dose rates were 9.56 μSv/h, 5.23 μSv/h, and 3.40 μSv/h in 100, 150 and 200 cm respectively. When using shielder, it shows 2.24 μSv/h, 1.67 μSv/h, and 1.27 μSv/h in 100, 150 and 200 cm on head. On chest, the measured dose rates were 8.54 μSv/h, 4.90 μSv/h, 3.44 μSv/h in 100, 150 and 200 cm, respectively. When using shielder, it shows 2.27 μSv/h, 1.34 μSv/h, and 1.13 μSv/h in 100, 150 and 200 cm on chest. On abdomen, the measured dose rates were 9.83 μSv/h, 5.15 μSv/h and 3.18 μSv/h in 100, 150 and 200cm respectively. When using shielder, it shows 2.60 μSv/h, 1.75 μSv/h and 1.23 μSv/h in 100, 150 and 200 cm on abdomen. Transmittance was increased as the distance was expanded. Conclusion: As the distance was further, the radiation dose were reduced. When using shielder, the dose were reduced as one-forth of without shielder. The Radio technologists are exposed of radioactivity and there were limitations on reducing the distance with Therefore, the proper shielding will be able to decrease radiation dose to the radiotechnologists.

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실험재료 및 방법

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키워드

PET Shielding Dose rate