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논문 기본 정보

자료유형
학술저널
저자정보
김태환 (한국원자력의학원) 김금배 (한국원자력의학원) 김근범 (한국원자력의학원) 김동욱 (연세대학교) 김상록 (한국원자력의학원) 최상현 (한국원자력의학원)
저널정보
한국의학물리학회 의학물리 의학물리 제33권 제4호
발행연도
2022.12
수록면
164 - 171 (8page)
DOI
10.14316/pmp.2022.33.4.164

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The number of facilities using radiation generators increases and related regulations are strengthened, the establishment of a shielding management and evaluation technology has become important. The characteristics of the radiation generator used in previous report differ from those of currently available high-frequency radiation generators. This study aimed to manufacture lead, iron, and concrete shielding materials for the re-verification of half-value layers, tenth-value layers, and attenuation curve. For a comparison of attenuation ratio, iron, lead, and concrete shields were manufactured in this study. The initial dose was measured without shielding materials, and doses measured under different types and thicknesses of shielding material were compared with the initial dose to calculate the transmission rate on 50–300 kVp X-ray. All the three shielding materials showed a tendency to require greater shielding thickness for higher energy. The attenuation graph showed an exponential shape as the thickness decreased and a straight line as the thickness increased. The difference between the measurement results and the previous study, except in extrapolated parts, may be due to the differences in the radiation generation characteristics between the generators used in the two studies. The attenuated graph measured in this study better reflects the characteristics of current radiation generators, which would be more effective for shield designing.

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