2011 Fiscal Year Final Research Report
Development of Sealed Sheet Sources for Calibration of Whole-body Counters
| Project/Area Number |
21560870
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Nuclear engineering
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| Research Institution | Nagoya University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
OGATA Yoshimune 名古屋大学, 医学部保健学科, 助教 (70185502)
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| Co-Investigator(Renkei-kenkyūsha) |
NAKANO Takashi 独立行政法人放射線医学総合研究所, 主任研究員 (70198159)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 放射線防護 / ホールボディカウンタ / 内部被ばく評価 / ファントム / 校正 |
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| Research Abstract |
The purpose of this study is to develop a new-type phantom for calibration of whole-body counters, in which sealed sheet sources are sandwiched between sections of a sliced anthropomorphic phantom such as the Rando phantom. Unlike conventional vessel-type phantoms, the proposed phantom has several advantages:
(a)the morphological similarity to human body
(b)the flexibility in the in vivo distribution
(c)the easiness in the replacement of radionuclides and so on. We invented a method to draw intricate patterns on paper with radioactive solutions using an ink-jet printer. Through the measurement of surface concentration of radioactivity, the autoradiographic evaluation of the pattern, the immersion test of the sources and the air monitoring during the printing, it was demonstrated that sealed sheet sources for the calibration phantom can be prepared safely by the present method. In addition, calibration coefficients for sealed sheet sources were evaluated by Monte Carlo simulation and compared with those for the BOMAB phantom, the most commonly used vessel-type phantom. The result showed that the differences of them between the two phantoms were negligibly small. It is expected that the achievement of this study will bring a new methodology to the calibration of whole-body counters.
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