| Project/Area Number |
05670763
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Radiation science
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| Research Institution | University of Tsukuba |
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Principal Investigator |
MARUHASHI Akira Univ.of Tsukuba, Clinical Medicine, Associate Prof., 臨床医学系, 助教授 (30114135)
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| Project Period (FY) |
1993 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1994: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1993: ¥1,500,000 (Direct Cost: ¥1,500,000)
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| Keywords | Charged-particle / Ridge Filter / Dose Distribution Modification / Spread out Bragg-peak / 陽子線 / 拡大ピーク内線量分布調整 / 拡大幅調整 |
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| Research Abstract |
We developed a ridge filter that enables to adjust the dose distribution in a spread out Bragg peak of proton beam by remote control. This device has 4 blocks a block of which is a quarter of a conical shape of MiX-DP block. Each pair of two blocks is put on an each line perpendicularly intersecting each other. The intersecting point of these two lines is coincided with an axis of proton beam. We could flatten the dose distribution of spread out Bragg peak of proton beam by adjusting the distance between two blocks of each pair. We, moreover, can adjust it if necessary, for example, in a case that relative biological effectiveness in spread out Bragg peak increases with depth.
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