| Project/Area Number |
12557223
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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 | 展開研究 |
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| Research Field |
Medical sociology
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| Research Institution | Osaka University |
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Principal Investigator |
MATSUMOTO Masao Osaka Univ., Medicine, Associate Prof., 医学部, 助教授 (50149944)
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| Co-Investigator(Kenkyū-buntansha) |
KANAMORI Hitoshi Fukui Institute of Technology, Engineering, Prof., 工学部, 教授 (70027770)
OGATA Yuji Osaka Univ., Medicine, Assistant, 医学部, 助手 (60281127)
KUBOTA Hideaki Osaka Univ., Medicine, Assistant, 医学部, 助手 (30234496)
ATSUMI Michifumi Tokyo Medic. Co. Ltd., R & D Section, Researcher, 機器開発課, 研究職
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| Project Period (FY) |
2000 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥6,400,000 (Direct Cost: ¥6,400,000)
Fiscal Year 2001: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2000: ¥5,100,000 (Direct Cost: ¥5,100,000)
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| Keywords | X-ray CT system / Primary x-ray spectrum / 90°-scattered X-ray spectrum / CdZnTe detector / Monte Carlo simulation / CdZnTe検出器 |
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| Research Abstract |
We have attempted to calculate a primary X-ray -spectrum of CT (Computed Tomography) system. Dose rates of primary X-ray spectrum are very high, so we reduced dose rate by using carbon scatterer and enabled to measure 90℃ scattered spectrum with a CdZnTe detector. The primary X-ray spectrum can be calculated from measured data of 90℃ scattered spectrum by counting backwards. In counting backwards, we used not only Klein-Nishina coefficients but also response functions obtained by Monte Carlo methods, because Raylei scattering and multiple scattering maybe occur in carbon scatterer.
In our results, the primary X-ray spectrum calculated from response functions obtained by Monte Carlo methods are roughly equivalent to that calculated from Klein-Nishina coefficients.
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