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Estimation of primary radiation output for wide-beam computed tomography scanner

Research Project

Project/Area Number 18K15656
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 52040:Radiological sciences-related
Research InstitutionFukushima Medical University

Principal Investigator

FUKUDA ATSUSHI  福島県立医科大学, 公私立大学の部局等, 准教授 (00811704)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
KeywordsX線CT装置 / ビーム幅 / 出力測定 / 散乱線 / 半価層測定 / リアルタイム測定器 / CT / 直接線 / 散乱ー直接線比 / X線ビーム幅測定法 / 電離箱式線量計 / X線CT / 空気カーマ / CTDI
Outline of Final Research Achievements

Three developments were achieved in this study, (a) a method for measuring primary radiation output in wide-beam CT scanner, (b) a method for measuring X-ray beam width for CT scanner using a portable flat panel detector, and (c) a method for measuring the half-value layer for CT systems in a single-rotation technique.

Academic Significance and Societal Importance of the Research Achievements

Z軸方向に広いビーム幅をもつX線CT装置の回転中心の自由空気カーマ出力測定において,ビーム幅および回転速度に影響しない出力測定方法を開発した.本手法によって,測定値の直接線成分と散乱線成分を区分けすることが可能となった.一例として,管電圧が135 kVかつビーム幅が160 mmの際,散乱-直接線比の結果は5.8%であった.この知見を活かし,回転中心の散乱線を減少させ,1回転で半価層を測定する新たな手法を開発した.本手法は散乱線の寄与を下げることが可能であることから,高精度な半価層測定が可能となった.これらの結果は、散乱線の寄与により測定精度が下がる分野において非常に有意義な結果であるといえる。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (9 results)

All 2020 2019 2018 Other

All Int'l Joint Research (2 results) Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (4 results) (of which Int'l Joint Research: 1 results)

  • [Int'l Joint Research] バージニアコモンウェルス大学(米国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] バージニアコモンウェルス大学(米国)

    • Related Report
      2018 Research-status Report
  • [Journal Article] Measurement of the half-value layer for CT systems in a single-rotation technique: Reduction of stray radiation with lead apertures2020

    • Author(s)
      Fukuda Atsushi、Ichikawa Nao、Tashiro Masami、Yamao Tensho、Murakami Katsuhiko、Kubo Hitoshi
    • Journal Title

      Physica Medica

      Volume: 76 Pages: 221-226

    • DOI

      10.1016/j.ejmp.2020.07.004

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Measurement Accuracy of CT Beam Width with a Portable Flat-panel Detector2020

    • Author(s)
      Ichikawa Nao、Matsubara Kosuke、Fukuda Atsushi、Yamamoto Hiroyuki
    • Journal Title

      Japanese Journal of Radiological Technology

      Volume: 76 Issue: 2 Pages: 161-167

    • DOI

      10.6009/jjrt.2020_JSRT_76.2.161

    • NAID

      130007800471

    • ISSN
      0369-4305, 1881-4883
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Estimation of primary radiation output for wide‐beam computed tomography scanner2019

    • Author(s)
      Fukuda Atsushi、Lin Pei‐Jan P.、Ichikawa Nao、Matsubara Kosuke
    • Journal Title

      Journal of Applied Clinical Medical Physics

      Volume: 20 Issue: 6 Pages: 152-159

    • DOI

      10.1002/acm2.12598

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Estimation of Primary Radiation Output with Two Ionization Chambers and a Solid-state Detector for Wide-beam Computed Tomography Scanner2020

    • Author(s)
      Fukuda Atsushi, Ichikawa Nao
    • Organizer
      The 76th annual meeting of the Japanese Society of Radiological Technology
    • Related Report
      2020 Annual Research Report
  • [Presentation] Measurement of Source Isocenter Distance, Fan Angle, and Effective Beam Diameter in Modern CT System2019

    • Author(s)
      Fukuda Atsushi、Ichikawa Nao
    • Organizer
      The 75th Annual Meeting of the Japanese Society of Radiological Technology
    • Related Report
      2019 Research-status Report
  • [Presentation] A New Method of Measuring Radiation Output Not Involved in Beam Width in Modern CT System2018

    • Author(s)
      Atsushi Fukuda, Nao Ichikawa
    • Organizer
      The 74th annual meeting of the Japanese Society of Radiological Technology
    • Related Report
      2018 Research-status Report
  • [Presentation] A New Method for Measuring Radiation Output Not Involved in Beam Width in Wide-Beam CT Scanner2018

    • Author(s)
      Atsushi Fukuda, Nao Ichikawa
    • Organizer
      The 60th annual meeting of the American Association of Physicists in Medicine
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

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Published: 2018-04-23   Modified: 2022-01-27  

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