2012 Fiscal Year Final Research Report
Development of a portable type open-window-ionization chamberin mammography
| Project/Area Number |
22591373
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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 |
Radiation science
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| Research Institution | Ibaraki Prefectural University of Health Science |
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Principal Investigator |
SATO Hitoshi 茨城県立医療大学, 保健医療学部, 教授 (90285057)
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| Co-Investigator(Renkei-kenkyūsha) |
GOTANDA Rumi (70542281)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 電離箱 / マンモグラフィ / 精度管理 / 医用放射線管理 |
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| Research Abstract |
In order to perform accuracy management based on the measurement value of the correct dose in mammography, in dose measurement of the low energy X-rays from mammography equipment , the portable type open-window-ionizationchamber which the characteristic of response does not vary was developed. In order to consider it as a portable type unlike the conventional free -ionization chamber, the shape of a collector electrode and arrangement were considered. The energy dependence and the evaluation of absolutely measurement of experimental model of an ionization-chamber were performed using the dose standard place with the same energy spectrum as the equipment used in mammography screening of X-rays. The linearity of dose rate dependence was good to ～15 mGys-1. In the energy range of the X-rays from tube voltage 23 kV to 110 kV, change of the response of a detector was less than 3 %. Moreover, dark current is 10-14～-15A, and it checked that the stable measurement value was obtained for a long time. The portable type open-window-ionization-chamber developed by a new concept can implement highly accurate and stabilized measurement in case of dose evaluation required for the accuracy management in the mammography equipment currently installed in medical facilities.
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Research Products
(32 results)
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[Journal Article] 臨床応用をめざす軟組織描画用の開発:X 線暗視野法の現状と将来見通し2011
Author(s)
安藤正海,霍慶凱,酒井正樹,湯浅哲也,砂口尚輝,杉山弘,兵頭一行,市原周,遠藤登紀子, 森健策,国定俊之,平野伸一,岩谷剛一、島雄大介,佐藤 斉,近浦吉則
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Journal Title
放射線
Volume: 37(2)
Pages: 39-45
Peer Reviewed
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[Journal Article] Dose Distribution in Pediatric CT Head Examination: Phantom Study2011
Author(s)
Gotanda R, Katsuda T, Gotanda T, Tabuchi A, Kuwano T, Yatake H, Yabunaka K, Akagawa T, Sato H, ,Takeda Y
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Journal Title
International Fedration Medical and Biological Engineering
Volume: 37
Pages: 547-550
Peer Reviewed
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[Presentation] 患者線量推定ツールの配布と利用状況の分析2013
Author(s)
長谷川健,佐藤 斉,千木崎信介,長谷川光昭,粟野泰市,五反田留見,沼尻俊夫,山下典教,新井誠,釜屋憲司,大内啓之,伊藤善行
Organizer
日本放射線技術学会,第59回関東部会研究発表大会
Place of Presentation
つくば
Year and Date
2013-02-02
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[Presentation] 近江綾, X線暗視野法を用いた乳癌早期診断法の提案:開発の現状と将来2011
Author(s)
安藤正海,遠藤登喜子,市原周,湯浅哲也,霍慶凱,砂口尚輝,酒井正樹,植野映,島雄大介,佐藤 斉,森健策
Organizer
第20回日本乳癌画像研究会
Place of Presentation
東京
Year and Date
2011-02-10
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[Presentation] 2-Dimensional and 3-Dimensional View of Breast Cancer Using Dark-Field Imaging2011
Author(s)
M. Ando, T. Endo, S. Ichihara, T. Yuasa, K. Mori, D. Shimao, H. Sato, Q. Huo, T. Sunaguchi, M.Sakai, A. Omi, H. Awane
Organizer
International Forum on Medical Imaging in Asia
Place of Presentation
Naha
Year and Date
2011-01-12
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