192Ir를 사용한 자궁경부암 치료시 주변 장기 및 근접한 사람의 선량 평가
Assessment of Radiation Dose for Surrounding Organs and Persons Approaching Patients upon Brachytherapy of Cervical Cancer with 192Ir
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초록
한국인의 신체 특성에 맞는 방사선치료 선량 평가를 위해 한국표준여성에 기초하여 수학적 모의피폭체를 제작하였다. 이후 자궁을 선원장기로 하여 자궁경부암 근접치료 시 발생할 것으로 예상되는 자궁 및 주변장기의 흡수선량과 치료환자에 근접한 사람의 선량을 평가하였다. 시뮬레이션을 위하여 방사성핵종은 자궁경부 근접치료에 유용하게 사용되는 192Ir을 선정하였고, 초기 방사능 1Ci를 투여하는 것으로 가정하였다. 그 결과 선원장기인 자궁에 4.92E-14Gy/Ci를 나타냈으며, 치료 환자로부터 거리에 따른 사람의 선량은 전방 30cm 거리에서 1.24E-07Sv를 나타났다.
Abstract
In order to evaluate radiation dose on the uterus and surrounding organs during brachytherapy for cervical cancer, of which the frequency of occurrence is high in Korean women, as well as radiation dose on medical staffs in proximity of patients receiving the therapy, a mathematical phantom based on reference Korean was established and the radiation dose was calculated accordingly. For simulation, 192Ir, which is useful in brachytherapy, was selected as radionuclide. Also, it was presumed that the intensity of initial radiation was 1Ci. The result indicated the radiation of 4.92E-14Gy/Ci in the uterus, the source organ. In addition, radiation on people around patient receiving the therapy was found to be 1.24E-07 Sv at a distance of 30cm.
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