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Development of the 18F-FDG PET Ki parametric images for evaluation of the disease activity in cardiac sarcoidosis

Research Project

Project/Area Number 19K08178
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 InstitutionKagoshima University

Principal Investigator

Nakajo Masatoyo  鹿児島大学, 医歯学域医学系, 講師 (00594631)

Co-Investigator(Kenkyū-buntansha) 窪薗 琢郎  鹿児島大学, 医歯学域医学系, 講師 (00598013)
吉浦 敬  鹿児島大学, 医歯学域医学系, 教授 (40322747)
神宮司 メグミ  鹿児島大学, 医歯学域鹿児島大学病院, 助教 (70418862)
谷 淳至  鹿児島大学, 医歯学域鹿児島大学病院, 講師 (70788166)
Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords心サルコイドーシス / 18F-FDG PET/CT / Ki parametric image / FDG-PET/CT / 速度定数画像
Outline of Research at the Start

18F-fluorodeoxyglucose(18F-FDG)-PETは心サルコイドーシスの活動性評価に用いられるが, 従来の評価法では心筋への生理的な18F-FDG集積により, 活動性評価が困難な場合がある。
18F-FDG動態解析における速度定数画像により, 正常心筋の描出を抑制させることができれば, 心サルコイド-シス病変の活動性評価の精度向上ならびに早期での適切な治療介入が可能となり, 治療の最適化に貢献するものと期待される。

Outline of Final Research Achievements

We investigated the usefulness of Ki parametric images extracted from dynamic 18F-FDG-PET/CT for evaluating the risk of clinical events (CEs) in cardiac sarcoidosis (CS). The Ki parametric images were generated from 30 dynamic 18F-FDG-PET/CT scans of 21 CS patients. The Ki images were rated as positive in 19 scans and negative in 11 scans, and the incidences of CEs were significantly higher in positive than negative scans [cardiac dysfunction: 78.9% (15/19) vs. 27.2% (3/11); arrhythmic events: 65.5% (10/19) vs. 0% (0/11)]. In 19 positive scans, 3 Ki parameters (Ki max, Ki mean and Ki volume) were significantly higher in patients with arrhythmic events than in those without them. Logistic regression analysis showed that the Ki volume alone was significantly associated with the risk of arrhythmic events. These results suggest that Ki images may add value to SUV images for evaluating the risk of CEs in CS patients.

Academic Significance and Societal Importance of the Research Achievements

サルコイドーシスは原因不明の全身性肉芽腫疾患である。心臓病変(心サルコイドーシス)は致死性不整脈や重症心不全を来たし、また、突然死の原因ともなり、サルコイドーシス患者の予後を大きく左右する。18F-FDG-PETは診断感度の向上に寄与することが明らかになっているが、心筋への生理的な集積の影響により、従来の18F-FDG-PET画像(SUV 画像)では活動性評価が困難な場合がある。
今回の研究で、組織への18F-FDGの移行状態を反映したKi パラメトリック画像は新たな心サルコイドーシスの活動性評価法となり、患者の治療や管理の上で有用な情報を提供することが示唆された。

Report

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

    (4 results)

All 2022 2021 2020

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

  • [Journal Article] Short-time-window Patlak imaging using a population-based arterial input function and optimized Bayesian penalized likelihood reconstruction: a feasibility study2022

    • Author(s)
      Tanaka Takato、Nakajo Masatoyo、Kawakami Hirofumi、Motomura Eriko、Fujisaka Tomofumi、Ojima Satoko、Saigo Yasumasa、Yoshiura Takashi
    • Journal Title

      EJNMMI Research

      Volume: 12 Issue: 1 Pages: 57-57

    • DOI

      10.1186/s13550-022-00933-8

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Value of Patlak Ki images from 18F-FDG-PET/CT for evaluation of the relationships between disease activity and clinical events in cardiac sarcoidosis2021

    • Author(s)
      Nakajo Masatoyo、Ojima Satoko、Kawakami Hirofumi、Tani Atsushi、Hirayama Akira、Jinguji Megumi、Kubozono Takuro、Ohishi Mitsuru、Yoshiura Takashi
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 2729-2729

    • DOI

      10.1038/s41598-021-82217-0

    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Dynamic PET/CTを用いた18F-FDG-PET Ki parametric imageの臨床応用について2022

    • Author(s)
      中條 正豊
    • Organizer
      第58回日本医学放射線学会秋季臨床大会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Patlak Ki images extracted from dynamic 18F-FDG-PET/CT: Values in evaluating the disease activity in cardiac sarcoidosis2020

    • Author(s)
      Masatoyo Nakajo, Megumi Jinguji, Hirofumi Kawakami, Atsushi Tani, Akira Hirayama, Takashi Yoshiura
    • Organizer
      RSNA Scientific Assembly and Annual Meeting,
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2024-01-30  

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