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Evaluation of scan protocols appropriate for patient-size in adult and pediatric CT examinations

Research Project

Project/Area Number 15K19202
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Medical Physics and Radiological Technology
Research InstitutionNagoya University

Principal Investigator

Fujii Keisuke  名古屋大学, 医学系研究科(保健), 助教 (40469937)

Project Period (FY) 2015-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords医療被ばく / CT / 線量評価 / 画質評価 / 放射線防護 / 臓器線量 / 低コントラスト
Outline of Final Research Achievements

The aim of this study is to investigate scan protocols appropriate for CT examinations based on the evaluation of radiation doses and image quality. We built Monte Carlo (MC) simulation models for adult and pediatric abdomen-pelvis CT scans with tube current modulation (TCM) and evaluated organ doses in the CT examinations using the simulation models. The doses were compared with those measured using adult and pediatric anthropomorphic phantoms and radio-photoluminescence glass dosimeters. We also developed an image quality phantom representing an adult abdominal shape. The image quality phantom was scanned with fixed tube current and TCM protocols which deliver almost the same CT dose index, and the radiation doses and image quality were evaluated. The results showed that dose distribution in CT scans with TCM was more uniform, and image noise on CT images obtained with TCM decreased in some regions.

Report

(4 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (34 results)

All 2017 2016 2015

All Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results,  Acknowledgement Compliant: 1 results) Presentation (29 results) (of which Int'l Joint Research: 7 results)

  • [Journal Article] Organ dose evaluations based on Monte Carlo simulation for CT examinations using tube current modulation2017

    • Author(s)
      Keisuke Fujii, Keiichi Nomura, Yoshihisa Muramatsu, Satoshi Obara, Keiichi Akahane, Masahiko Kusumoto
    • Journal Title

      Radiation Protection Dosimetry

      Volume: 174 Pages: 387-394

    • DOI

      10.1093/rpd/ncw144

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Patient size-specific analysis of dose indexes from CT lung cancer screening2017

    • Author(s)
      Keisuke Fujii, Kyle McMillan, Maryam Bostani, Christopher Cagnon, Michael McNitt-Gray
    • Journal Title

      American Journal of Roentgenology

      Volume: 208 Issue: 1 Pages: 144-149

    • DOI

      10.2214/ajr.16.16082

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Development of age-specific Japanese physical phantoms for dose evaluation in infant CT examinations2016

    • Author(s)
      Chiyo Yamauchi-Kawaura, Keisuke Fujii, Keiichi Akahane, Masato Yamauchi, Satoshi Obara, Kazuhiro Narai, Toshihiko Katsu, Kuniharu Imai, Mitsuru Ikeda
    • Journal Title

      Radiation Protection Dosimetry

      Volume: in press Issue: 4 Pages: 483-502

    • DOI

      10.1093/rpd/ncv420

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Evaluation of organ doses in adult and paediatric CT examinations based on Monte Carlo simulations and in-phantom dosimetry2015

    • Author(s)
      Keisuke Fujii, Keiichi Nomura, Yoshihisa Muramatsu, Keisuke Takahashi,Satoshi Obara, Keiichi Akahane, Mitsuo Satake
    • Journal Title

      Radiation Protection Dosimetry

      Volume: 165 Issue: 1-4 Pages: 166-171

    • DOI

      10.1093/rpd/ncv074

    • Related Report
      2015 Research-status Report
    • Peer Reviewed
  • [Journal Article] Estimation of Organ and Effective Doses for Neonate and Infant Diagnostic Cardiac Catheterizations2015

    • Author(s)
      Toshio Kawasaki, Keisuke Fujii, Keiichi Akahane
    • Journal Title

      American Journal of Roentgenology

      Volume: 205 Issue: 3 Pages: 599-603

    • DOI

      10.2214/ajr.14.13852

    • Related Report
      2015 Research-status Report
    • Peer Reviewed
  • [Presentation] シミュレーション計算に基づいた管電流変調機能使用時の小児CT検査における臓器線量の評価2017

    • Author(s)
      藤井啓輔、野村恵一、村松禎久、後藤崇博、小原 哲、赤羽恵一、楠本昌彦
    • Organizer
      第73回日本放射線技術学会総会学術大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 超高精細CTと従来CTの比較:線量シミュレーションによる腹部CT撮影の被ばく線量の検討2017

    • Author(s)
      野村恵一、藤井啓輔、長澤宏文、村松禎久、塚越伸介、柿沼龍太郎
    • Organizer
      第73回日本放射線技術学会総会学術大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] フィルタ形状推定方法の違いが線量シミュレーション結果に与える影響について2017

    • Author(s)
      野村恵一、藤井啓輔、太田博之、村松禎久
    • Organizer
      日本CT技術学会第5回学術大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 乳幼児頭部CT検査時の頭部形状の違いにおける画質と線量の関係2017

    • Author(s)
      川浦稚代、藤井啓輔、今井國治、池田 充
    • Organizer
      日本保健物理学会第50回研究発表会 日本放射線安全管理学会第16回学術大会 合同大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 高分子材料を利用したX線CT検査時の人体内線量分布測定2017

    • Author(s)
      大澤直子、小塚美喜、菅 七海、伊藤菜る美、川浦稚代、山本誠一、藤井啓輔、小森雅孝、山内雅人
    • Organizer
      日本保健物理学会第50回研究発表会 日本放射線安全管理学会第16回学術大会 合同大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] X 線 CT 画像における雑音分散の被写体の位置依存性に関する検討2017

    • Author(s)
      西尾俊貴、池田 充、梅田祐司、藤井啓輔、川浦稚代、今井國治
    • Organizer
      第36回日本医用画像工学会大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Organ dose evaluations based on Monte Carlo simulation and in-phantom dosimetry for interventional radiology2016

    • Author(s)
      Keisuke Fujii, Keiichi Nomura, Yoshihisa Muramatsu, Miki Yoshimura, Naotaka Sato, Masahiko Kusumoto
    • Organizer
      102nd Scientific Assembly and Annual Meeting of Radiological Society of North America
    • Place of Presentation
      アメリカ合衆国, シカゴ
    • Year and Date
      2016-11-27
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Can size-specific dose estimates (SSDE) be regarded as the preferred dose index for the detectability in lung cancer CT screening?2016

    • Author(s)
      Yoshihisa Muramatsu, Keiichi Nomura, Keisuke Fujii, Michael McNitt-Gray, Masahiko Kusumoto
    • Organizer
      102nd Scientific Assembly and Annual Meeting of Radiological Society of North America
    • Place of Presentation
      アメリカ合衆国, シカゴ
    • Year and Date
      2016-11-27
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] CT画像における信号強度と確率共鳴によるコントラスト改善の関係2016

    • Author(s)
      五十嵐健悟, 藤井啓輔, 川浦稚代, 森 政樹, 池田 充, 今井國治
    • Organizer
      2016年電子情報通信学会ソサイエティ大会
    • Place of Presentation
      札幌
    • Year and Date
      2016-09-20
    • Related Report
      2016 Research-status Report
  • [Presentation] X線CT画像の画素間の雑音の共分散に関する検討2016

    • Author(s)
      西尾俊貴, 池田 充, 藤井啓輔, 川浦稚代, 今井國治
    • Organizer
      第35回日本医用画像工学会大会
    • Place of Presentation
      千葉
    • Year and Date
      2016-07-21
    • Related Report
      2016 Research-status Report
  • [Presentation] 乳幼児頭部単純CT検査における画質と線量の関係2016

    • Author(s)
      川浦稚代, 藤井啓輔, 今井國治, 池田 充, 山内雅人
    • Organizer
      日本保健物理学会第49回研究発表会
    • Place of Presentation
      弘前
    • Year and Date
      2016-06-30
    • Related Report
      2016 Research-status Report
  • [Presentation] CT画像における確率共鳴と付加ノイズの周波数帯域との関係2016

    • Author(s)
      五十嵐 健悟, 山元 勇輝, 内藤 啓介, 藤井 啓輔, 川浦 稚代, 池田 充, 今井 國治
    • Organizer
      2016年 電子情報通信学会総合大会
    • Place of Presentation
      福岡
    • Year and Date
      2016-03-15
    • Related Report
      2015 Research-status Report
  • [Presentation] Stchastic Resonance in CT images Using Non-white Gaussian Noise2016

    • Author(s)
      Kengo Igarashi, Kuniharu Imai, Yuuki Yamamoto, Mitsuru Ikeda, Keisuke Fujii, Chiyo Yamauchi-Kawaura, Keisuke Naito
    • Organizer
      The Eighth International Workshop on Image Media Quality and its Applications
    • Place of Presentation
      名古屋
    • Year and Date
      2016-03-10
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] X線CT画像上の雑音分散に関する検討2016

    • Author(s)
      梅田祐司, 池田 充, 西尾俊貴, 橋元翔吾, 藤井啓輔, 川浦稚代, 今井國治
    • Organizer
      平成28年度日本生体医工学会東海支部学術集会
    • Place of Presentation
      名古屋
    • Related Report
      2016 Research-status Report
  • [Presentation] Evaluation of Simulated Radiation Dose in Chest Examinations Performed Using Super-High-Resolution CT with 0.25-mm Slice Thickness 128 Detector Rows2015

    • Author(s)
      Keiichi Nomura, Keisuke Fujii, Yoshihisa Muramatsu, Hirobumi Nagasawa, Shinsuke Tsukagoshi, Ryutaro Kakinuma
    • Organizer
      101st Scientific Assembly and Annual Meeting of the Radiological Society of North America
    • Place of Presentation
      アメリカ合衆国, シカゴ
    • Year and Date
      2015-11-29
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] 脳血管内における水溶性ヨード製剤の薬物動態/薬力学解析(PK/PD解析)2015

    • Author(s)
      内藤 啓介, 今井 國治, 西本 卓矢, 旗 道子, 山元 勇輝, 藤井 啓輔, 川浦 稚代, 森 政樹, 池田 充, 泉 孝嗣
    • Organizer
      第31回NPO法人日本脳神経血管内治療学会学術総会
    • Place of Presentation
      岡山
    • Year and Date
      2015-11-19
    • Related Report
      2015 Research-status Report
  • [Presentation] 逐次近似画像におけるノイズ付加効果2015

    • Author(s)
      五十嵐 健悟, 山元 勇輝, 内藤 啓介, 川浦 稚代, 藤井 啓輔, 池田 充, 今井 國治
    • Organizer
      第43回日本放射線技術学会秋季学術大会
    • Place of Presentation
      金沢
    • Year and Date
      2015-10-08
    • Related Report
      2015 Research-status Report
  • [Presentation] 臓器線量評価に基づいた乳幼児CT検査における非対称可変コリメータの被ばく低減効果に関する検討2015

    • Author(s)
      川浦 稚代, 山内 雅人, 小原 哲, 藤井 啓輔, 赤羽 恵一, 今井 國治, 池田 充
    • Organizer
      第43回日本放射線技術学会秋季学術大会
    • Place of Presentation
      金沢
    • Year and Date
      2015-10-08
    • Related Report
      2015 Research-status Report
  • [Presentation] 見かけのNoise SDを用いたCT画像のノイズ評価2015

    • Author(s)
      森 政樹, 今井 國治, 山元 勇輝, 内藤 啓介, 川浦 稚代, 藤井 啓輔, 池田 充, 遠地 志太, 西本 卓矢, 米田 和夫
    • Organizer
      第14回情報科学技術フォーラム
    • Place of Presentation
      愛媛
    • Year and Date
      2015-09-15
    • Related Report
      2015 Research-status Report
  • [Presentation] 確率共鳴画像における信号形状の定量評価2015

    • Author(s)
      山元 勇輝, 五十嵐 健悟, 内藤 啓介, 藤井 啓輔, 川浦 稚代, 森 政樹, 池田 充, 今井 國治
    • Organizer
      2015年電子情報通信学会ソサエティ大会
    • Place of Presentation
      仙台
    • Year and Date
      2015-09-08
    • Related Report
      2015 Research-status Report
  • [Presentation] 類似度を用いた確率共鳴現象の定量評価2015

    • Author(s)
      五十嵐 健悟, 山元 勇輝, 内藤 啓介, 藤井 啓輔, 川浦 稚代, 森 政樹, 池田 充, 今井 國治
    • Organizer
      電子情報通信学会イメージメディアクォリティ研究会
    • Place of Presentation
      鹿児島
    • Year and Date
      2015-09-04
    • Related Report
      2015 Research-status Report
  • [Presentation] X線CT画像における各画素の雑音の標準偏差に関する検討2015

    • Author(s)
      曽貝 佳佑, 池田 充, 村上 誠介, 藤井 啓輔, 川浦 稚代, 今井 國治
    • Organizer
      第34回日本医用画像工学会大会
    • Place of Presentation
      金沢
    • Year and Date
      2015-07-30
    • Related Report
      2015 Research-status Report
  • [Presentation] カーブレット変換を用いたX線CT画像の雑音除去に関する検討2015

    • Author(s)
      村上 誠介, 池田 充, 曽貝 佳佑, 藤井 啓輔, 川浦 稚代, 今井 國治
    • Organizer
      第34回日本医用画像工学会大会
    • Place of Presentation
      金沢
    • Year and Date
      2015-07-30
    • Related Report
      2015 Research-status Report
  • [Presentation] Patient-Size Specific Analysis of CT Doses From Lung Cancer Screening2015

    • Author(s)
      Keisuke Fujii, Kyle McMillan, Maryam Bostani, Christopher Cagnon, Michael McNitt-Gray
    • Organizer
      American Association of Physicists in Medicine 57th Annual Meeting
    • Place of Presentation
      アメリカ合衆国, アナハイム
    • Year and Date
      2015-07-12
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Differences Observed in Radiation Doses Across 2 Similar CT Scanners From Adult Brain-Neck CT Angiography2015

    • Author(s)
      Keisuke Fujii, Kyle McMillan, Maryam Bostani, Christopher Cagnon, Michael McNitt-Gray
    • Organizer
      American Association of Physicists in Medicine 57th Annual Meeting
    • Place of Presentation
      アメリカ合衆国, アナハイム
    • Year and Date
      2015-07-12
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Benchmarking Head CT Doses: A Pooled Vs. Protocol Specific Analysis of Radiation Doses in Adult Head CT Examinations2015

    • Author(s)
      Keisuke Fujii, Maryam Bostani, Christopher Cagnon, Michael McNitt-Gray
    • Organizer
      American Association of Physicists in Medicine 57th Annual Meeting
    • Place of Presentation
      アメリカ合衆国, アナハイム
    • Year and Date
      2015-07-12
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] 脳溝狭小型ファントムを用いた脳梗塞CT検査における画質改善と被ばく低減に関する研究2015

    • Author(s)
      川浦 稚代, 山元 勇輝, 五十嵐 健悟, 内藤 啓介, 山内 雅人, 藤井 啓輔, 池田 充, 今井 國治
    • Organizer
      日本保健物理学会第48回研究発表会
    • Place of Presentation
      東京
    • Year and Date
      2015-07-02
    • Related Report
      2015 Research-status Report
  • [Presentation] Influence of molecular structure of iodinated contrast media on contrast enhancement efficacy2015

    • Author(s)
      内藤 啓介, 今井 國治, 西本 卓也, 山元 勇輝, 藤井 啓輔, 川浦 稚代, 森 政樹, 池田 充
    • Organizer
      第40回日本IVR学会総会
    • Place of Presentation
      宮崎
    • Year and Date
      2015-05-28
    • Related Report
      2015 Research-status Report
  • [Presentation] 0.25mm*128列の超高精細CTを用いた胸部CT撮影の被ばく線量の検討2015

    • Author(s)
      野村 恵一, 藤井 啓輔, 長澤 宏文, 村松 禎久, 塚越 伸介, 柿沼 龍太郎, 森山 紀之
    • Organizer
      第71回日本放射線技術学会総会学術大会
    • Place of Presentation
      横浜
    • Year and Date
      2015-04-16
    • Related Report
      2015 Research-status Report

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Published: 2015-04-16   Modified: 2019-03-29  

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