2004 Fiscal Year Final Research Report Summary
Evaluation of Radiation Quality with Nano-Site Size for Neutron Capture Therapy Field
| Project/Area Number |
14370280
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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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 | Kyushu University |
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Principal Investigator |
ONIZUKA Yoshihiko Kyushu University, School of Health Sciences, Faculty of Medicine, Professor, 医学部・保健学科, 教授 (30160899)
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| Project Period (FY) |
2002 – 2004
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| Keywords | Microdosimetry / Neutron Capture Therapy / Radiation Quality / Heavy Water / Radiation T therapy / TEPC |
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| Research Abstract |
Boron neutron capture therapies (BNCT) at Kyoto university reactor (KUR) were treated for more than 90 patients after that that clinical was begun for 1987.After then, dose distribution was improved remarkably by the utilization of the epitheimal neutron. But, the problem which should be solved occurred in the dose evaluation of the irradiation field in which thermal neutron, epithermal neutron and fast neutron and a gamma ray were mixed. Quantity evaluations were done with the pair ionization chambers and the activation method of gold foil irradiation, But their results didn't show good agreement. Relation between the amount of physics dose and the amount of biological dose isn't definite. The solution of this problem was done by using the technique of the microdosimetry for the microscopic energy deposit in this research. When the energy of the proton recoiled by the neutron became smaller than 10 keV, the proton captured the electron, and it changed to neutral hydrogen and usual appraisal method couldn't be solved it.
Because lineal energy which was similar to LET could be measured, the technique of microdosimetiy Frequency and dose mean lineal energies were evaluated as a function of lineal energy. They were measured with an tissue equivalent proportion counter(TEPC) in the organization which had boron containing (50ppm) wall, and RBE were obtained Difference from the usual tissue equivalent wall were evaluated in comparison with boron containing wall. The amount of dose contribution for thetherrnal and the epithennal neutron could be decided. Changes by the depth in human body phantom were evaluated, and the fundamental data of BNCT were obtained We emphasize that our research result cleared relations between physical and biological dose by using the response function.
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Research Products
(26 results)
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[Journal Article] An Estimation of RBE for therapeutic carbon beam at HIMAC using microdosimetiy technique.2003
Author(s)
Y.Onizuka, S.Endo, M.Takada, M.Ishikawa, M.Hoshi, S.Uehara, N.Matsufuji, T.Kanai, H.Yamaguchi, N.Maeda, N.Hayabuchi
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Journal Title
Japanese Journal of Medical Physics Vol.22 Sup.2
Pages: 55-58
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Change of Radiation Quality on Lateral Direction2003
Author(s)
Y.Onizuka, S.Endo, M.Ishikawa, M.Hoshi, Y Sakurai, T.Kobayashi, H.Utsumi, N.Hayabuchi, T.Takatsuji, H.Yamaguchi, M.Takada, K.Fujikawa, N.Maeda, K.Tanaka
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Journal Title
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Microdosimetry with TEPC of Boron Containing Wall2003
Author(s)
Y.Onizuka, S.Endo, M.Ishikawa, M.Hoshi, S.Sakurai, T.Kobayashi, H.Utsumi, N.Hayabuchi, T.Takatsuji, H.Yamaguchi, M.Takada, K.Fujikawa, N.Maeda, K.Tanaka
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Journal Title
KURRI Prog.Rep.KURRI-KR-95
Pages: 53-58
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Microdosimetry of Heavy Water Neutron Irradiation Field with TEPC of Boron Containing Wall.2003
Author(s)
Y.Onizuka, S.Endo, M.Ishikawa, M.Hoshi, S.Sakurai, T.Kobayashi, H.Utsumi, M.Takada, H.Yamaguchi, N.Maeda, N.Hayabuchi, T.Takatsuji
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Journal Title
ISSN0917-1746
Pages: 241-245
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Microdosiunetry of Epithermal Neutron Field at The Kyoto University Reactor2002
Author(s)
Y.Onizuka, S.Endo, M.Ishikawa, M.Hoshi, M.Takada, T.Kobayashi, Y.Sakurai, H.Utsumi, S.Uehara, N.Hayabuchi, N.Maeda, T.Takatsuji, K.Fujikawa
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Journal Title
Radiation Protection Dosimetry 99
Pages: 383-385
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Estimation of Relative Biological Effectiveness for Carbon Beam2002
Author(s)
Y.Onizuka, S.Endo, M.Takada, M.Ishikawa, M.Hoshi, S.Uehara, H.Yamaguchi, T.Kanai, N.Matsufuji, K.Shizuma
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Journal Title
Proceedings of the Third Korea-Japan Joint Meeting on Medical Physics and The Second Asia Oceania Congress of Medical Physics, ISSN 1589-6691
Pages: 219-221
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Microdosimefry by the Counter with Boron Containing Wall2002
Author(s)
Y.Onizuka, S.Endo, M.Ishikawa, J.Takada, M.HoshI, S.Sakurai, T.Kobayashi, H.Utsumi, N.Hayabuchi, T.Takatsuji, H, Yamaguchi, M.Takada, K.Fujikawa, N.Maeda
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Journal Title
KURRI Progress Report 2002 131
Description
「研究成果報告書概要(欧文)」より
