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2010 Fiscal Year Final Research Report

Dose effect on Image Quality of head CT image

Research Project

  • PDF
Project/Area Number 20591474
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Radiation science
Research InstitutionNagoya University

Principal Investigator

IMAI Kuniharu  Nagoya University, 医学部・保健学科, 准教授 (20335053)

Co-Investigator(Kenkyū-buntansha) IKEDA Mitsuru  名古屋大学, 医学部・保健学科, 教授 (50184437)
KAWAURA Chiyo  名古屋大学, 医学部・保健学科, 助教 (60324422)
Project Period (FY) 2008 – 2010
Keywords頭部CT検査 / 画質評価 / 画像診断 / 医療被ばく / 線量評価
Research Abstract

The purpose of this study is to investigate the relationship between radiation dose and image quality in a head CT examination. Our designed head phantom was employed as a target object and was scanned using a 64-raw MDCT. Lens doses increased with tube voltage and effective mAs. The image noise reduced as tube voltage and effective mAs increased. However, for larger than 252 mAs, the image noise level for 120 kV was almost the same as that for 140 kV. For larger than 252 mAs, the streak artifacts for 100 kV had the same level as for 120 and 140 kV and the streak artifacts were most noticeable for 80 kV. The SNR was highest at 100 kV.

  • Research Products

    (10 results)

All 2010 2009

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (5 results)

  • [Journal Article] Physica Medica2010

    • Author(s)
      Kuniharu Imai, Mitsuru Ikeda, Yukihiro Enchi, Takanaga Niimi
    • Journal Title

      European Journal of Medical Physics Vol.26

      Pages: 157-165

    • Peer Reviewed
  • [Journal Article] A method for estimating noise variance of CT image2010

    • Author(s)
      Mitsuru Ikeda, Reiko Makino, Kuniharu Imai, Maiko Matsumoto, Rika Hitomi
    • Journal Title

      Computerized Medical Imaging and Graphics Vol.34

      Pages: 642-650

    • Peer Reviewed
  • [Journal Article] Statistical characteristics of streak artifacts on CT images : relationship between streak artifacts and mAs values2009

    • Author(s)
      Kuniharu Imai, Mitsuru Ikeda, Yukihiro Enchi, Takanaga Niimi
    • Journal Title

      Medical Physics Vol.36

      Pages: 492-499

    • Peer Reviewed
  • [Journal Article] Quantitative Assessment of Image Noise and Streak Artifact on CT Image : Comparison of Z-axis Automatic Tube Current Modulation Technique with Fixed Tube Current Technique2009

    • Author(s)
      Kuniharu Imai, Mitsuru Ikeda, Yukihiro Enchi, Takanaga Niimi
    • Journal Title

      Computerized Medical Imaging and Graphics Vol.33

      Pages: 353-358

    • Peer Reviewed
  • [Journal Article] Fractal-feature distance analysis of contrast-detail phantom image and meaning of pseudo fractal dimension and complexity2009

    • Author(s)
      Kuniharu Imai, Mitsuru Ikeda, Yukihiro Enchi, Takanaga Niimi
    • Journal Title

      a Australasian Physical and Engineering Sciences in Medicine Vol.32

      Pages: 188-195

    • Peer Reviewed
  • [Presentation] 伊藤過程に基づくLSF推定とそれを用いた鮮鋭度評価2010

    • Author(s)
      今井國治
    • Organizer
      第9回情報科学技術フォーラム
    • Place of Presentation
      福岡
    • Year and Date
      2010-09-08
  • [Presentation] 医用画像上の不均一部分におけるCNR解析2009

    • Author(s)
      森政樹
    • Organizer
      平成22年電気学会電子・情報・システム部門大会
    • Place of Presentation
      熊本
    • Year and Date
      2009-09-03
  • [Presentation] 医用画像上の不均一部分における雑音評価法の考案-Top-hat変換型Gauss法の評価精度の検証2009

    • Author(s)
      森政樹
    • Organizer
      第8回情報科学技術フォーラム
    • Place of Presentation
      仙台
    • Year and Date
      2009-09-02
  • [Presentation] 脳動脈瘤CT画像診断における画質及び被ばく線量評価用ファントムの作製2009

    • Author(s)
      川浦稚代
    • Organizer
      日本保健物理学会第43回研究発表会
    • Place of Presentation
      大阪
    • Year and Date
      2009-06-03
  • [Presentation] New Methods for Evaluating Streak Artifacts and Image Noises in Non-uniform Region on CT Image Separately2009

    • Author(s)
      今井國治
    • Organizer
      International Forum on Medical Imaging in Asia 2009
    • Place of Presentation
      台湾
    • Year and Date
      2009-01-21

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Published: 2012-01-26   Modified: 2016-04-21  

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