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Development and Evaluation of Multi-step Dose Evaluation Method in X-ray Computed Tomography

Research Project

Project/Area Number 18K07746
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52040:Radiological sciences-related
Research InstitutionKanazawa University

Principal Investigator

Matsubara Kosuke  金沢大学, 保健学系, 教授 (30507372)

Co-Investigator(Kenkyū-buntansha) 福田 篤志  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 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywordsコンピュータ断層撮影 / 被ばく線量 / 最適化 / 放射線技術学 / 医学物理学
Outline of Final Research Achievements

A study was conducted with the aim of easily and accurately acquiring the patient dose information required before and after CT imaging. In order to improve the estimation accuracy of size-specific dose estimate (SSDE) before CT scan, it was necessary to apply the correction method to each cross section in the body axis direction. In addition, the dose data of each organ of the patients was analyzed, and a positive correlation was found between the equivalent dose and SSDE in all the organs included in the acquisition range. In order to estimate the organ doses in detail after CT imaging, a dose calculation program corresponding to CT was developed using the Monte Carlo simulation code and it was shown that the absorbed doses can be calculated with high accuracy. Furthermore, improvements have been made to make the dose calculation program compatible with various types of dual-energy CT.

Academic Significance and Societal Importance of the Research Achievements

本研究によって,CT撮影前にsize-specific dose estimate(SSDE)を簡便かつ精度よく推定するための方法を考案できた.さらに,SSDEから各臓器の線量を高い精度で推定できることを示した.得られた線量情報は,その後に実施するCT撮影の撮影条件を最適化するために役立てることができる.また,本研究で開発したCTに対応した線量計算プログラムは高い精度で線量が計算できるとともに,近年広く普及しているdual-energy CTにも対応したプログラムとなっており,得られた線量情報は,詳細な臓器線量の解析やリスク評価に役立てることができる.

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (38 results)

All 2021 2020 2019 2018 Other

All Int'l Joint Research (5 results) Journal Article (8 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 6 results,  Open Access: 4 results) Presentation (21 results) (of which Int'l Joint Research: 5 results,  Invited: 9 results) Book (1 results) Remarks (3 results)

  • [Int'l Joint Research] ナレスアン大学(タイ)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] ディポネゴロ大学/バンドン工科大学(インドネシア)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] カリフォルニア州立大学(米国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] チュラロンコン大学(タイ)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] マレーシアプトラ大学(マレーシア)

    • Related Report
      2018 Research-status Report
  • [Journal Article] Use of optically stimulated luminescence dosimeter and radiophotoliminescent glass dosimeter for dose measurement in dual-source dual-energy computed tomography2021

    • Author(s)
      Hirosawa Ayaka、Matsubara Kosuke、Morioka Yusuke、Kitagawa Masayasu、Chusin Thunyarat、Takemura Akihiro
    • Journal Title

      Physical and Engineering Sciences in Medicine

      Volume: 44 Issue: 4 Pages: 1311-1319

    • DOI

      10.1007/s13246-021-01063-6

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Assessment of Radiation Dose in Medical Imaging and Interventional Radiology Procedures for Patient and Staff Safety2021

    • Author(s)
      Matsubara Kosuke
    • Journal Title

      Diagnostics

      Volume: 11 Issue: 6 Pages: 1116-1116

    • DOI

      10.3390/diagnostics11061116

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 4. Phantoms for Dose Evaluation in Computed Tomography2021

    • Author(s)
      Matsubara Kosuke
    • Journal Title

      Japanese Journal of Radiological Technology

      Volume: 77 Issue: 4 Pages: 406-409

    • DOI

      10.6009/jjrt.2021_JSRT_77.4.406

    • NAID

      130008027564

    • ISSN
      0369-4305, 1881-4883
    • Related Report
      2021 Annual Research Report
  • [Journal Article] An Evaluation of Radiation Dose for Wide Volume Scan during Chest CT2021

    • Author(s)
      Sako Kenji、Matsubara Kosuke、Matsumoto Makoto
    • Journal Title

      Japanese Journal of Radiological Technology

      Volume: 77 Issue: 3 Pages: 284-292

    • DOI

      10.6009/jjrt.2021_JSRT_77_3.284

    • NAID

      130008000600

    • ISSN
      0369-4305, 1881-4883
    • Related Report
      2021 Annual Research Report
  • [Journal Article] Performance evaluation of near-real time angular tube current modulation in X-ray computed tomography using real-time dosimeter: a phantom study2020

    • Author(s)
      Kosuke Matsubara, Hiroki Kawashima, Masanao Kobayashi, Atsushi Fukuda
    • Journal Title

      Health and Technology

      Volume: 10 Issue: 6 Pages: 1437-1443

    • DOI

      10.1007/s12553-020-00473-y

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Axial absorbed dose distributions during abdominal computed tomography acquisitions: Measurement and the Monte Carlo simulation study2019

    • Author(s)
      Kosuke Matsubara, Hiroji Nagata, Rena Okubo, Yoshinori Ogawa, Thunyarat Chusin, Ayaka Hirosawa
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 1248 Issue: 1 Pages: 012020-012020

    • DOI

      10.1088/1742-6596/1248/1/012020

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Feasibility of the new copper pipe method for evaluating half‐value layer in computed tomography: A measurement and Monte Carlo simulation study2019

    • Author(s)
      Rena Okubo, Kosuke Matsubara, Thunyarat Chusin, Tomoya Hibino, Yusuke Ito
    • Journal Title

      Journal of Applied Clinical Medical Physics

      Volume: 20 Issue: 12 Pages: 186-192

    • DOI

      10.1002/acm2.12780

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Axial absorbed dose distributions during abdominal computed tomography acquisitions: Measurement and the Monte Carlo simulation study2019

    • Author(s)
      Kosuke Matsubara, Hiroji Nagata, Rena Okubo, Yoshinori Ogawa, Ayaka Hirosawa
    • Journal Title

      Journal of Physics Conference Series

      Volume: 印刷中

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] ワイドビームCTにおける線量評価測定法のファントムの長さによる影響2021

    • Author(s)
      野村彩香,豐田真咲,松原孝祐
    • Organizer
      第13回中部放射線医療技術学術大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 肝臓dynamic CTにおける逐次近似再構成法と深層学習を用いた再構成法との比較および被ばくの最適化の検討2021

    • Author(s)
      中西輝良々,松原孝祐,高森美保
    • Organizer
      第13回中部放射線医療技術学術大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Fast kV Switching方式のDual Energy CTに対応した線量計算プログラムの開発および精度評価2021

    • Author(s)
      吉川諒,松原孝祐
    • Organizer
      日本放射線技術学会第49回秋季学術大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 肝臓ダイナミックCT における放射線被ばくによる生涯寄与リスクの評価2021

    • Author(s)
      豐田真咲,松原孝祐,野村彩香
    • Organizer
      日本CT技術学会第9回学術大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 被ばく線量ソフトウェアで用いるボクセルファントムの体格推定2021

    • Author(s)
      柴田英輝,浅田恭生,松原孝祐,小澤功
    • Organizer
      日本放射線技術学会第76回総会学術大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] DRLs 2020がもたらしたもの ―新時代における線量管理方法―2021

    • Author(s)
      松原孝祐
    • Organizer
      第13回中部放射線医療技術学術大会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] CT線量管理の必要性とDRLs 2020に基づく線量の最適化2021

    • Author(s)
      松原孝祐
    • Organizer
      第39回関西SOMATOM研究会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] CTにおけるDRLの運用2021

    • Author(s)
      松原孝祐
    • Organizer
      日本放射線技術学会第49回秋季学術大会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Outline and Expected Outcome of the Updated National Diagnostic Reference Levels (DRLs 2020) for Computed Tomography and Diagnostic Fluoroscopy in Japan2021

    • Author(s)
      Matsubara Kosuke
    • Organizer
      日本放射線技術学会第77回総会学術大会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 汎用モンテカルロコードによるDual-energy CTを想定した線量計算プログラムの開発2020

    • Author(s)
      松原孝祐,吉川諒,秦美鈴,廣澤文香
    • Organizer
      日本CT技術学会第8回学術大会
    • Related Report
      2020 Research-status Report
  • [Presentation] CT撮影における線量測定法および測定精度について2020

    • Author(s)
      松原孝祐
    • Organizer
      第14回SCCT研究会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Accuracy of Size-specific Dose Estimates for Different-sized Phantoms during Abdominal CT Acquisitions2019

    • Author(s)
      Kosuke Matsubara, Thunyarat Chusin, Yoshinori Ogawa, Rena Okubo
    • Organizer
      The 17th South-East Asia Congress of Medical Physics in conjuction with the 3rd Annual Scientific Meeting on Medical Physics and Biophysics
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] CTの線量シミュレーションにおける各種パラメータの最適化について2019

    • Author(s)
      杉沢綾香,松原孝祐
    • Organizer
      第2回日本放射線安全管理学会・日本保健物理学会合同大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Evaluation of Size-Specific Dose Estimates Calculated by Localizer Radiographs of Different Image Filters2019

    • Author(s)
      壽原秀,栗山和,梁野伸貴,飯嶋恵,庄司友和,加藤洋,松原孝祐
    • Organizer
      日本放射線技術学会第75回総会学術大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 腹部CT撮影時の吸収線量とSize-Specific Dose Estimatesの関係-実測およびシミュレーションを併用した検証-2019

    • Author(s)
      松原孝祐,Thunyarat Chusin,大久保玲奈,小川善紀
    • Organizer
      日本放射線技術学会第75回総会学術大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Accuracy of axial absorbed dose distributions during abdominal CT based on Monte Carlo method2019

    • Author(s)
      Kosuke Matsubara, Hiroji Nagata, Rena Okubo, Thunyarat Chusin, Yoshinori Ogawa
    • Organizer
      31st European Congress of Radiology
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Patient safety in computed tomography: dose optimization and safe use of contrast media2019

    • Author(s)
      Kosuke Matsubara
    • Organizer
      11th Annual Scientific Meeting of Thai Medical Physicist Society
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Axial absorbed dose distributions with different tube voltages during abdominal CT: Measurement and the Monte Carlo simulation study2018

    • Author(s)
      Kosuke Matsubara, Hiroji Nagata, Rena Okubo, Yoshinori Ogawa, Thunyarat Chusin, Ayaka Hirosawa
    • Organizer
      18th Asia-Oceania Congress of Medical Physics & 16th South-East Asia Congress of Medical Physics
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Patient Dosimetry in Computed Tomography2018

    • Author(s)
      Kosuke Matsubara
    • Organizer
      18th Asia-Oceania Congress of Medical Physics & 16th South-East Asia Congress of Medical Physics
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] シミュレーションによるCT線量評価-活用法および問題点-2018

    • Author(s)
      松原孝祐
    • Organizer
      日本放射線技術学会第46回秋季学術大会
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] Size-specific dose estimates(SSDE)について2018

    • Author(s)
      松原孝祐
    • Organizer
      日本CT技術学会第6回学術大会
    • Related Report
      2018 Research-status Report
    • Invited
  • [Book] CT super basics2019

    • Author(s)
      Katsuhiro Ichikawa, Kosuke Matsubara, Kazuto Kozaka, Satoshi Kobayashi
    • Total Pages
      203
    • Publisher
      オーム社
    • ISBN
      9784274700750
    • Related Report
      2018 Research-status Report
  • [Remarks] 金沢大学研究者情報

    • URL

      https://ridb.kanazawa-u.ac.jp/public/detail.php?id=2012

    • Related Report
      2021 Annual Research Report
  • [Remarks] 金沢大学放射線計測・防護研究室(松原研究室)ウェブサイト

    • URL

      http://matsuk.w3.kanazawa-u.ac.jp/

    • Related Report
      2021 Annual Research Report 2020 Research-status Report 2019 Research-status Report 2018 Research-status Report
  • [Remarks] 金沢大学研究者情報

    • URL

      http://ridb.kanazawa-u.ac.jp/public/detail.php?id=2012

    • Related Report
      2020 Research-status Report 2019 Research-status Report 2018 Research-status Report

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Published: 2018-04-23   Modified: 2023-01-30  

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