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2012 Fiscal Year Annual Research Report

3テスラMRIを用いた超高B値拡散強調画像による前立腺癌検出システムの確立

Research Project

Project/Area Number 23791427
Research InstitutionKobe University

Principal Investigator

北島 一宏  神戸大学, 医学部附属病院, 講師 (80448860)

Keywords前立腺癌 / MRI / 拡散強調画像
Research Abstract

生検で前立腺癌と判明し当院泌尿器科にて前立腺全摘術が施行された患者さんを対象とし、術前に施行した3テスラMRIの拡散強調画像から計算されるADC mapと摘出された前立腺の病理結果を照らし合して、Ultra-high b value(b=2000 s/mm2)とStandard-high b-value(b=1000 s/mm2)を用いたADC値による癌の検出能(良悪の鑑別能)を後方視的に検討し、癌部と非癌部のADC値はoverlapが多少存在するものの、ROC解析によるAz値(0.8前後)や最適cut off値による感度・特異度(70~80%程度)は比較的良好な結果となり、ADC値による定量評価は日常診断に有用な情報を寄与しうる事が確認できた。また、癌部のADC値が前立腺癌の悪性度を示し予後とも密接に関係すると言われているGleason score/gradeと密接に相関することを示し、生検でのGleason score/gradeと同程度に、手術で得られる真のGleason score/gradeを予測できることをつきとめた。以上の成果は、国内外の様々な学会で発表するとともに、論文発表(Journal of Magnetic Resonance Imaging とEuropean Journal of Radiologyに掲載決定)を行った。

  • Research Products

    (4 results)

All 2013 2012

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (2 results)

  • [Journal Article] Ultra-high b-value diffusion-weighted MRI for the detection of prostate cancer with 3-T MRI.2013

    • Author(s)
      上野嘉子
    • Journal Title

      Journal of Magnetic Resonance Imaging

      Volume: 未定 Pages: 未定

    • DOI

      10.1002/jmri.23953

    • Peer Reviewed
  • [Journal Article] Do apparent diffusion coefficient (ADC) values obtained using high b-values with a 3-T MRI correlate better than a transrectal ultrasound (TRUS)-guided biopsy with true Gleason scores obtained from radical prostatectomy specimens for patients with prostate cancer?2013

    • Author(s)
      北島一宏
    • Journal Title

      European Journal of Radiolog

      Volume: 未定 Pages: 未定

    • DOI

      S0720-048X(13)00107-1. 10.1016/j.ejrad.2013.02.021

    • Peer Reviewed
  • [Presentation] Can Apparent Diffusion Coefficient (ADC) values be obtained using high b-values with a 3-Tesla MRI correlate better withtrue Gleason Scores from radical prostatectomy specimen than a transrectal ultrasound (TRUS)-guided biopsy in patients with prostate cancer ?2013

    • Author(s)
      北島一宏
    • Organizer
      The 4th Asian Congress of Abdominal Radiology (4th ACAR)
    • Place of Presentation
      Kaohsiung, Taiwan
    • Year and Date
      20130322-20130324
  • [Presentation] Differentiation of malignant and normal tissues of the prostate by apparent diffusion coefficient values at 3-Tesla MRI: Comparison between ultra-high b-value (2,000 s/mm2) and standard-high b-value (1,000 s/mm2).2012

    • Author(s)
      北島一宏
    • Organizer
      AOCR2012 (The 14th Asian Oceanian Congress of Radiology)
    • Place of Presentation
      Sydney, Australia
    • Year and Date
      20120830-20130902

URL: 

Published: 2014-07-24  

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