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Development of large arer gamma-ray detectors with position resolution of 0.1mm

Research Project

Project/Area Number 16H03969
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionChiba University

Principal Investigator

KAWAI Hideyuki  千葉大学, 大学院理学研究院, 准教授 (60214590)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2018: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2017: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2016: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Keywordsγ線測定器 / 荷電粒子位置測定器 / 生体内透視 / 低い被曝線量 / 金属容器内透視 / 土砂災害埋没者探索 / 高位置分解能 / 薄型荷電粒子測定器 / γ線方向測定 / 素粒子実験 / 大面積 / 放射線測定器 / γ線
Outline of Final Research Achievements

We have developed new radiation detectors for high energy charged particles. Our detectors consist of thin inorganic scintillator, Wave Length Shifting Fibers and small photodetectors called SiPM. The pecliarities of our detectors copaired from the standard drift chambers are good position resolution (0.3mm to 0.1mm), low cost (1/2) and thin width (500mm to 1mm). In the case few ten layers of our detectors are mounted, the positon that the high energy gamma-rays convert to rlrctron positron pairs can be measured. The electromagnetic shower detectors measured the center position of the shower. The position resosulion of them are typically 10mm. Our detectors measure the track of primaly electrons and positrons and the vertex positions of the incident gamma-rays convert the e+e- pairs can be calculated. expected position resolution is
less than 0.1 mm.

Academic Significance and Societal Importance of the Research Achievements

本研究では従来の荷電粒子測定器と比べて高い位置分解能・低価格・薄い測定器を開発した。そしてそれを数十層重ねると高エネルギーγ線の入射位置が、従来の精度10mmに対して0.1mm以下という画期的な精度で測定可能となる。さらにこの測定器は、がん診断などのPET測定器の実質的な精度を1/10程度に改善する、加速器がん治療における体内被曝位置が直接測定でき患者一人当たりの治療室占有時間を1/10に短縮できる、被曝線量が極めて高いX線CTと同程度の生体内透視能力があり被曝量が1/100となるγ線CTが実現できる。γ線CTは金属容器内の透視や土砂災害埋没者の探索も可能である。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (7 results)

All 2019 2018 2017 2016

All Presentation (5 results) (of which Int'l Joint Research: 5 results) Patent(Industrial Property Rights) (2 results) (of which Overseas: 2 results)

  • [Presentation] Performance Evaluation of Gamma Detector Using 0.2mm phi Wavelength-Shifting Fibers2018

    • Author(s)
      A. Kobayashi, H. Kawai and K. Kamada
    • Organizer
      2018 IEEE Nuclear Science Symposium and Medical Imaging Conference
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Proposal of Range Verification Method for Carbon Therapy using Prompt Gamma-rays over 10 Mev2018

    • Author(s)
      S. Kimura and H. Kawai
    • Organizer
      Nuclear Science Symposium and Medical Imaging Conference
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Proposal of Gamma Rays Detector with Position Resolution of 0.1mm2017

    • Author(s)
      T. Yuzawa
    • Organizer
      IEEE Nuclear Science Symposium and Medical Imaging Conference 2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Proposal for dosimetry system using e+ e- pair creation events2016

    • Author(s)
      KIMURA Shota
    • Organizer
      International Conference on Medical Physics 2016
    • Place of Presentation
      Shangri-la Hotel, Bngkok, Thailand
    • Year and Date
      2016-12-09
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of whole-Body PET apparatus with 3mm-resolution with 1M$2016

    • Author(s)
      FUJIHARA Kenta
    • Organizer
      International Conference on Medical Physics 2016
    • Place of Presentation
      Shangri-la Hotel, Bngkok, Thailand
    • Year and Date
      2016-12-09
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Patent(Industrial Property Rights)] 反射型断層撮影装置2019

    • Inventor(s)
      河合秀幸
    • Industrial Property Rights Holder
      千葉大学
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2019-082455
    • Filing Date
      2019
    • Related Report
      2018 Annual Research Report
    • Overseas
  • [Patent(Industrial Property Rights)] 断層撮影装置2017

    • Inventor(s)
      河合秀幸
    • Industrial Property Rights Holder
      千葉大学
    • Industrial Property Rights Type
      特許
    • Filing Date
      2017
    • Acquisition Date
      2019
    • Related Report
      2018 Annual Research Report
    • Overseas

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Published: 2016-04-21   Modified: 2024-12-25  

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