| Project/Area Number |
22611009
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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 |
Medical Physics/Radiological Technology
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| Research Institution | Nagoya University |
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Principal Investigator |
KAWAURA Chiyo (YAMAUCHI Chiyo) 名古屋大学, 医学系研究科(保健), 助教 (60324422)
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| Co-Investigator(Kenkyū-buntansha) |
FUJII Keisuke 独立行政法人国立がん研究センター, 東病院, 診療放射線技師 (40469937)
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| Co-Investigator(Renkei-kenkyūsha) |
AOYAMA Takahiko 名古屋大学, 医学系研究科(保健), 教授 (80023307)
AKAHANE Keiichi 独立行政法人放射線医学総合研究所, 重粒子医科学センター, 室長 (80202521)
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| Project Period (FY) |
2010 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2012: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2011: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2010: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
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| Keywords | 医療被ばく / 乳幼児 / X 線 CT / 人体ファントム / 線量測定・評価 / X線CT |
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| Research Abstract |
To investigate the radiation doses in CT examinations for Japanese infants, we developed an in-phantom dosimetry system consisting of small-sized photodiode dosimeters installed at various organ sites within a 3-year-old head phantom. Organ doses in head CT examinations that have been routinely performed most frequently were measured with the in-phantom dosimetry system in several hospitals. The evaluation of organ doses in head CT examinations for 0-year-old and 6-year-old children was also conducted using in-phantom dosimetry systems that we developed in the past then the dose level with each age was compared. We investigated the effect of the latest dose reduction system on infant and adult, and we found that the dose reduction effects of tube-current modulation systems on infant, which have no waist and a small body, was few compared with adult. The results obtained in this study would become the useful information when we reconsidered the radioprotection and the optimization of infant CT examinations.
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