2011 Fiscal Year Final Research Report
Development of a Variable-Energy, Variable-Intensity, On/Off-Switchable Gamma-Ray Needle Source for Brachytherapy
| Project/Area Number |
21650126
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Medical systems
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
OGURI Yoshiyuki 東京工業大学, 原子炉工学研究所, 教授 (90160829)
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| Co-Investigator(Kenkyū-buntansha) |
HASEGAWA Jun 東京工業大学, 大学院・総合理工学研究科, 准教授 (90302984)
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| Co-Investigator(Renkei-kenkyūsha) |
OGAWA Masao 駒澤大学, 医療健康科学部, 教授 (60016863)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 小線源治療 / 陽子線 / 注射針 / 荷電粒子励起X線 / 静電加速器 / 吸収線量 |
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| Research Abstract |
We investigated the feasibility of a new cancer therapy, in which a syringe needle is inserted into the tumor deep inside the patient's body and a proton beam is transported through the needle to a heavy-metal target at the end in order to produce gamma-rays. Since preliminary measurements showed that the gamma-ray intensity was not enough, we used characteristic X-rays instead. After precise alignment, the beam transmission has reached 80% of the value expected from the needle bore size. Ag KX-rays were produced by attaching a Ag target at the end of the needle. Only Ag KX-rays were successfully extracted, since other low-energy X-rays were attenuated by the needle wall.
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