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Establishment of evaluation method in pretreatment prostate cancer tumor aggressiveness using MRI-US fusion-guided targeted prostate biopsy

Research Project

Project/Area Number 19K08109
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 InstitutionKawasaki Medical School

Principal Investigator

TAMADA Tsutomu  川崎医科大学, 医学部, 教授 (40278932)

Co-Investigator(Kenkyū-buntansha) 宮地 禎幸  川崎医科大学, 医学部, 教授 (00294463)
山本 亮  川崎医科大学, 医学部, 准教授 (30319959)
鹿股 直樹  聖路加国際大学, 聖路加国際病院, 部長 (60263373)
曽根 照喜  川崎医科大学, 医学部, 教授 (90179383)
Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords前立腺癌 / MRI / MRIガイド下生検 / 腫瘍悪性度 / 拡散強調像 / 前立腺マルチパラメトリックMRI / 前立腺生検 / 機械学習 / PI-RADS / 悪性度
Outline of Research at the Start

前立腺癌の腫瘍悪性度は、治療法の選択や予後に影響する。しかしながら、従来の経直腸超音波を用いた系統的前立腺生検による腫瘍悪性度の評価は、前立腺全摘術後の最終結果と比べて過小評価される傾向がある。
一方、前立腺癌の画像診断は、近年MRIの活用が飛躍的に進み、現在では悪性度の高い病変部位をMRIで推定することが可能となってきている。
そのような中で近年、MRIと経直腸超音波の融合画像をガイドにした前立腺標的生検法が開発された。そこで本研究では、我々の持つ前立腺MRIのノウハウとMRI‐経直腸超音波画像ガイド下前立腺標的生検を組み合わせ、治療前の前立腺癌の悪性度に対する高精度な評価法の確立を目指す。

Outline of Final Research Achievements

The accuracy of prostate cancer aggressiveness prior to treatment has a significant impact on subsequent treatment decisions. Recently, MRI-ultrasound fusion-guided prostate targeted biopsy (MRI-guided biopsy) has been covered by health insurance, and its discrimination ability has been improved compared to conventional systematic biopsy, but it is still insufficient. We focused on the ADC map, a diffusion-weighted prostate MRI image that reflects prostate cancer aggressiveness, and designed a clinical study to apply it to MRI-guided biopsy. The ability of MRI-guided biopsy with ADC maps to identify prostate cancer aggressiveness before treatment was a superior diagnostic method that could not be surpassed by machine learning models with the addition of MRI and clinical indicators to MRI-guided biopsy.

Academic Significance and Societal Importance of the Research Achievements

治療前の前立腺癌の悪性度はその後の治療法の決定に大きな影響を与えます。我々は、MRI‐超音波融合画像ガイド下前立腺標的生検の際に前立腺MRIの撮像法の一つである拡散強調像(ADC map)の情報を加えた生検方法を考案した。その診断精度は最近話題となっている人工知能(AI)を用いた機械学習モデルでも超えることができない高い診断能を有することが分かった。本研究の成果は、前立腺癌の患者さんに適切な治療を提供するための最適な診断法を明らかにし、今後それが臨床応用されることを示唆した。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (7 results)

All 2023 2022 2021 2019

All Journal Article (6 results) (of which Peer Reviewed: 6 results,  Open Access: 1 results) Presentation (1 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Short repetition time diffusion-weighted imaging improves visualization of prostate cancer2023

    • Author(s)
      Higaki A, Tamada T, Kido A, Takeuchi M, Ono K, Miyaji Y, Yoshida K, Sanai H, Moriya K, Yamamoto A.
    • Journal Title

      Japanese Journal of Radiology

      Volume: Online ahead of print. Issue: 5 Pages: 487-499

    • DOI

      10.1007/s11604-023-01519-7

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Comparison Between Amide Proton Transfer Magnetic Resonance Imaging Using 3-Dimensional Acquisition and Diffusion-Weighted Imaging for Characterization of Prostate Cancer: A Preliminary Study2023

    • Author(s)
      Kido A, Tamada T, Ueda Y, Takeuchi M, Kanki A, Yamamoto A.
    • Journal Title

      Journal of Computer Assisted Tomography

      Volume: 47 Issue: 2 Pages: 178-185

    • DOI

      10.1097/rct.0000000000001398

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Comparison of single-shot EPI and multi-shot EPI in prostate DWI at 3.0 T2022

    • Author(s)
      Tamada T, Kido A, Ueda Y, Takeuchi M, Kanki A, Neelavalli J, Yamamoto A.
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 16070-16070

    • DOI

      10.1038/s41598-022-20518-8

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Clinical impact of ultra-high b-value (3000 s/mm 2) diffusion-weighted magnetic resonance imaging in prostate cancer at 3T: comparison with b-value of 2000 s/mm 22022

    • Author(s)
      Tamada T, Kido A, Ueda Y, Takeuchi M, Fukunaga T, Sone T, Yamamoto A.
    • Journal Title

      Br J Radiol

      Volume: 195 Issue: 1131 Pages: 20210465-20210465

    • DOI

      10.1259/bjr.20210465

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Comparison of Biparametric and Multiparametric MRI for Clinically Significant Prostate Cancer Detection With PI-RADS Version 2.12021

    • Author(s)
      Tamada T, Kido A, Yamamoto A, Takeuchi M, Miyaji Y, Moriya T, Sone T.
    • Journal Title

      J Magn Reson Imaging

      Volume: 53 Issue: 1 Pages: 283-291

    • DOI

      10.1002/jmri.27283

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Comparison of PI-RADS version 2 and PI-RADS version 2.1 for the detection of transition zone prostate cancer2019

    • Author(s)
      Tamada Tsutomu、Kido Ayumu、Takeuchi Mitsuru、Yamamoto Akira、Miyaji Yoshiyuki、Kanomata Naoki、Sone Teruki
    • Journal Title

      European Journal of Radiology

      Volume: 121 Pages: 108704-108704

    • DOI

      10.1016/j.ejrad.2019.108704

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Diagnosis of Transition Zone Prostate Cancer: Comparison of the Prostate Imaging Reporting and Data System (PI-RADS) Version 2 and Version 2.1.2019

    • Author(s)
      Kido A, Tamada T, et al.
    • Organizer
      RSNA
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2025-01-30  

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