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Quantitative image analysis of the tumor microenvironment in esophageal cancer using dual energy CT

Research Project

Project/Area Number 20K08112
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 InstitutionKyushu University

Principal Investigator

Nishimuta Yusuke  九州大学, 大学病院, 助教 (10635220)

Co-Investigator(Kenkyū-buntansha) 西江 昭弘  九州大学, 医学研究院, 教授 (20457427)
浅山 良樹  大分大学, 医学部, 教授 (40380414)
甲斐 聖広  九州大学, 大学病院, 助教 (50848645)
鶴丸 大介  九州大学, 大学病院, 講師 (90419565)
Project Period (FY) 2020-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2022: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords食道癌 / 微小環境 / Dual energy CT / 多層検出器CT / 機械学習 / がん周囲環境 / CT / バイオマーカー
Outline of Research at the Start

多層検出器CTの画像所見と食道癌の病理組織学的所見(分化度、深達度、脈管侵襲、リンパ管侵襲、リンパ節転移の有無)の対比を行う。がん周囲微小環境に関して切除標本の免疫組織化学染色を行いTAMやCAFの多寡を検討し、多層検出器CTテクスチャ解析で得られる parameter との関連を調査する。機械学習の入力データとして多層検出器 CT の実行原子番号画像、ヨード密度画像、仮想単純画像などを組み合わせ、multi-parametricな解析を行い、これらを教師データとしてがん周囲微小環境を評価可能な診断システムの構築、検証を行う。

Outline of Final Research Achievements

Using contrast-enhanced CT scans and clinical data from 309 patients with esophageal squamous cell carcinoma collected between 2018 and 2024, we sought to develop imaging biomarkers that characterize the tumor microenvironment. Standard texture metrics showed no significant association with therapeutic response; however, analysis of the extracellular volume fraction (CT-ECV) derived from equilibrium-phase iodine density images revealed significantly lower values in responders. At an optimal threshold of 42.1 %, CT-ECV achieved an AUC of 0.89, with 87.5 % sensitivity and 85.7 % specificity. Patients with low CT-ECV had a favorable 1-year progression-free survival of 87.5 %, whereas those with high CT-ECV had a poor outcome of 47.3 %. These results have been presented at international conferences, including the RSNA, and a manuscript is currently under review.

Academic Significance and Societal Importance of the Research Achievements

本研究は、多層検出器 CT のみで得られる CT-ECV を用いて ESCC の治療奏功と予後を高精度に予測できることを示した。腫瘍組織全体の線維化を非侵襲的に定量化できるため、侵襲的生検の代替となりうる点で学術的価値が高い。術前に治療抵抗性を推定し高リスク患者を同定することで、個別化治療選択や不要な化学療法の回避が可能となり、患者 QOL 向上と医療資源の最適化に資する。さらに多施設検証と AI モデル統合により、画像診断の新たな標準指標として社会実装が期待される。

Report

(6 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (7 results)

All 2025 2024 2023 2022 2021

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

  • [Journal Article] Esophageal lymphangioma: Endoscopic ultrasound, computed tomography, and magnetic resonance imaging appearance2024

    • Author(s)
      Nanjo Katsuya、Tsurumaru Daisuke、Hirakawa Masakazu、Nishimuta Yusuke、Mimori Koshi、Ishigami Kousei
    • Journal Title

      Radiology Case Reports

      Volume: 19 Issue: 11 Pages: 4841-4844

    • DOI

      10.1016/j.radcr.2024.07.144

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Extracellular volume fraction determined by equilibrium contrast-enhanced computed tomography: correlation with histopathological findings in gastric cancer2023

    • Author(s)
      Nishimuta Yusuke、Tsurumaru Daisuke、Kai Satohiro、Maehara Junki、Asayama Yoshiki、Oki Eiji、Ishigami Kousei
    • Journal Title

      Japanese Journal of Radiology

      Volume: 41 Issue: 7 Pages: 752-759

    • DOI

      10.1007/s11604-023-01393-3

    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A case of KIT negative extra-gastrointestinal stromal tumor arising in the greater omentum with predominant cystic formation2021

    • Author(s)
      Nanjo Katsuya、Nishimuta Yusuke、Miyasaka Mitsutoshi、Shinozaki Kenji、Tsurumaru Daisuke、Ishigami Kousei
    • Journal Title

      Radiology Case Reports

      Volume: 16 Issue: 8 Pages: 2315-2318

    • DOI

      10.1016/j.radcr.2021.05.061

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 2層検出器CTで測定した細胞外容積分率による食道扁平上皮癌の術前化学療法治療効果予測2025

    • Author(s)
      Yusuke Nishimuta
    • Organizer
      第84回日本医学放射線学会総会
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] PROGNOSTIC VALUE OF EXTRACELLULAR VOLUME FROM EQUILIBRIUM CONTRAST-ENHANCED CT IN STAGE II-III GASTRIC CANCER2024

    • Author(s)
      Yusuke Nishimuta
    • Organizer
      2024 Annual Meeting Program Planning Committee
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Prediction of pathological response to neoadjuvant chemotherapy for advanced gastric cancer using extracellular volume fraction determined by dual-layer spectral CT2023

    • Author(s)
      Nishimuta Yusuke
    • Organizer
      第59回日本医学放射線学会秋季臨床大会
    • Related Report
      2023 Research-status Report
  • [Presentation] 進行胃癌術後再発予測における造影CTを用いたExtracellular volume fraction解析の有用性2022

    • Author(s)
      西牟田雄祐
    • Organizer
      第58回日本医学放射線学会秋季臨床大会
    • Related Report
      2022 Research-status Report

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Published: 2020-04-28   Modified: 2026-01-16  

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