GEANT4를 이용한 치료용 I-131 캡슐의 안정성 시뮬레이션

• 영문명: Safety Simulation of Therapeutic I-131 Capsule Using GEANT4
• 발행기관: 대한핵의학기술학회
• 저자명: 정영환(Yeong-Hwan Jeong) 김병철(Byung-Cheol Kim) 심철민(Cheol-Min Sim) 서한경(Han-Kyung Seo) 권용주(Yong-Ju Gwon) 한동현(Dong-Hyun Han)
• 간행물 정보: 『핵의학기술』Vol.18 No.2, 57~61쪽, 전체 5쪽
• 주제분류: 의약학 > 방사선과학
• 파일형태: PDF
• 발행일자: 2014.11.30

영문 초록

Purpose Iodine (I-131) is one of the most widely used radioactive isotopes for therapeutic in the field of nuclear medicine. Therapeutic I-131 capsule is made out of lead to shield high energy radiation. Accurate dosimetry is necessarily required to perform safe and effective work for relative workers. The Monte Carlo method is known as a method to predict the absorbed dose distribution most accurately in radiation therapy and many researchers constantly attempt to apply this method to the dose calculation of radiotherapy recently. This paper aims to calculate distance dependent and activity dependent therapeutic I-131 capsule using GEANT4. Materials and Methods Therapeutic capsules was implemented on the basis of the design drawings. The simulated dose was determined by generating of gamma rays of energy to more than 364 keV. The simulated dose from the capsule at the distance of 10 cm and 100 cm was measured and calculated in the model of water phantom. The simulated dose were separately calculated for each position of each detector. Results According to the domestic regulation on radiation safety, the dose at 10 cm and 100 cm away from the surface of therapeutic I-131 capsule should not exceed 2.0 mSv/h and 0.02 mSv/h, respectively. The simulated doses turned out to be less than the limit, satisfying the domestic regulation. Conclusion These simulation results may serve as useful data in the prediction of hands dose absorbed by I-131 capsule handling. GEANT4 is considered that it will be effectively used in order to check the radiation dose.

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키워드

Thyroid cancer Therapeutic I-131 capsule GEANT4 Domestic regulations on radiation safety