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Clarifying the Significance of Radiographic Examination in Osteoarthritis of the Knee Using MRI 3D Analysis

Research Project

Project/Area Number 21K09271
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56020:Orthopedics-related
Research InstitutionTokyo Medical and Dental University

Principal Investigator

Sekiya Ichiro  東京医科歯科大学, 統合研究機構, 教授 (10345291)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords変形性膝関節症 / 膝 / 骨棘 / レントゲン / 半月板 / 半月板逸脱 / 軟骨 / MRI3次元解析 / 変形性関節症 / レントゲン検査
Outline of Research at the Start

1950年代に変形性膝関節症のレントゲン重症度分類が発表されて以来、関節裂隙狭小と骨棘形成の2つの変化は関節軟骨の変化を反映するものと理解されてきた。他方、2010年代になると内側半月板の逸脱が変形性膝関節症の発症・進行に影響することを示す報告が増えたが、レントゲン画像での内側大腿関節の裂隙狭小と骨棘形成は、関節軟骨摩耗と内側半月板逸脱のどちらを反映するものなのか未だ明らかになっていない。そこで変形性膝関節症に対するレントゲン検査の意義を独自に開発したMRI3D解析で明らかにすることを目的とする。レントゲン画像による病態の理解が進み、MRI検査数を減らすことになり、医療費の削減につながる。

Outline of Final Research Achievements

The purpose of this study was to clarify the significance of radiographic examinations in knee osteoarthritis (OA) using data from a community population cohort study and our originally developed MRI 3D analysis. First, we compared the correlation between the difference in medial joint space width (JSW) in extension and flexion positions on standing anteroposterior knee radiographs with either cartilage thickness or medial meniscus extrusion (MME) width from MRI data. We found that the medial joint space width difference was more strongly influenced by MME than by cartilage thickness. Next, we investigated the significance of osteophyte width and joint space width in extension position. We showed that osteophyte width strongly reflects MME, while JSW reflects cartilage thickness. Furthermore, we analyzed cartilage thickness in OA and revealed that cartilage thickness is already decreased in specific subregions at Kellgren-Lawrence (KL) grade 1, and progresses further at KL grade 2.

Academic Significance and Societal Importance of the Research Achievements

膝レントゲン検査の意義が明らかになれば、一般的で低コストの画像検査のみで病態の理
解が進み、治療方針を決定するまでの期間が短縮され、患者の裨益する点が大きい。また、MRI検査の実施件数を減らすことが可能となり、医療費削減につながる。さらに、KL分類と関節軟骨摩耗が生じている部位や半月板逸脱の関係を解明することによって、レントゲンの影から実体を推測することが可能となる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (13 results)

All 2023 2022 2021 Other

All Int'l Joint Research (1 results) Journal Article (4 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (8 results) (of which Int'l Joint Research: 1 results,  Invited: 3 results)

  • [Int'l Joint Research] Boston University School of Medicine(米国)

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Association of AI-determined Kellgren-Lawrence grade with medial meniscus extrusion and cartilage thickness by AI-based 3D MRI analysis in early knee osteoarthritis.2023

    • Author(s)
      Ichiro Sekiya, Hisako Katano, Ali Guermazi, Yugo Miura, Noriya Okanouchi, Makoto Tomita, Jun Masumoto, Yoshio Kitazume, Hideyuki Koga, Nobutake Ozeki.
    • Journal Title

      Sci Rep

      Volume: 13 Issue: 1 Pages: 20093-20093

    • DOI

      10.1038/s41598-023-46953-9

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Medial Tibial Osteophyte Width Strongly Reflects Medial Meniscus Extrusion Distance and Medial Joint Space Width Moderately Reflects Cartilage Thickness in Knee Radiographs2022

    • Author(s)
      Sekiya Ichiro、Sasaki Sho、Miura Yugo、Aoki Hayato、Katano Hisako、Okanouchi Noriya、Tomita Makoto、Masumoto Jun、Koga Hideyuki、Ozeki Nobutake
    • Journal Title

      Journal of Magnetic Resonance Imaging

      Volume: 56 Issue: 3 Pages: 824-834

    • DOI

      10.1002/jmri.28079

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 特集 期変形性膝関節症の診断と治療 早期変形性膝関節症の定義2021

    • Author(s)
      関矢一郎 大関信武
    • Journal Title

      関節外科 基礎と臨床

      Volume: 40 Issue: 7 Pages: 690-694

    • DOI

      10.18885/JJS.0000000681

    • ISSN
      0286-5394
    • Year and Date
      2021-07-19
    • Related Report
      2021 Research-status Report
  • [Journal Article] Difference in the joint space of the medial knee compartment between full extension and Rosenberg weight-bearing radiographs2021

    • Author(s)
      Miura Yugo、Ozeki Nobutake、Katano Hisako、Aoki Hayato、Okanouchi Noriya、Tomita Makoto、Masumoto Jun、Koga Hideyuki、Sekiya Ichiro
    • Journal Title

      European Radiology

      Volume: 32 Issue: 3 Pages: 1429-1437

    • DOI

      10.1007/s00330-021-08253-6

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 早期変形性膝関節症のMRI3D解析2023

    • Author(s)
      関矢一郎
    • Organizer
      第1回日本膝関節学会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 雲外蒼天~膝単純レントゲン像から軟骨立体構造を読み解く方法を見いだし、滑膜幹細胞による半月板温存の多施設治験に挑む2023

    • Author(s)
      関矢一郎
    • Organizer
      第1回日本スポーツ整形外科学会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] AIを用いた変形性膝関節症のMRI三次元解析2022

    • Author(s)
      関矢一郎
    • Organizer
      第40回日本骨代謝学会学術集会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 膝MRIの全自動3次元画像解析:変形性関節症の病態解明から再生医療の評価まで2021

    • Author(s)
      関矢 一郎
    • Organizer
      第80回  日本医学放射線学会総会
    • Related Report
      2021 Research-status Report
  • [Presentation] 日本人変形性膝関節症MRI実態調査が明らかにする発症機序2021

    • Author(s)
      関矢 一郎
    • Organizer
      熊本県臨床整形外科医会
    • Related Report
      2021 Research-status Report
  • [Presentation] 膝Xpの骨棘と裂隙狭小は何を意味するか?MRI3D解析調査が明らかにするOA発症機序と治療の展望2021

    • Author(s)
      関矢 一郎
    • Organizer
      東入間医師会学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 膝MRI 3D画像から見えてくる単純レントゲンの意義と変形性膝関節症の病態2021

    • Author(s)
      関矢 一郎
    • Organizer
      2021 Hi Advanced MR Webセミナー
    • Related Report
      2021 Research-status Report
  • [Presentation] Medial tibial osteophyte width strongly reflects medial meniscus extrusion distance and medial joint space width moderately reflects cartilage thickness in knee radiographs.2021

    • Author(s)
      Ichiro Sekiya
    • Organizer
      MUSCULOSKELETAL WORKSHOP SERIES
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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Published: 2021-04-28   Modified: 2025-01-30  

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