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Evaluate the usefulness of postmortem CT and MRI for drug toxicology

Research Project

Project/Area Number 19K08114
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 InstitutionHokkaido University

Principal Investigator

Hyodoh Hideki  北海道大学, 医学研究院, 准教授 (30306154)

Co-Investigator(Kenkyū-buntansha) 的場 光太郎  北海道大学, 医学研究院, 講師 (00466450)
神 繁樹  北海道大学, 医学研究院, 特任助教 (60531845)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords死後画像 / 死後CT / 死後MRI / 薬毒物分析 / 死後CT / 死後MRI / LC/MS / GC/MS / 薬毒物検査 / 薬物中毒 / 熱中症 / 喘息重積 / 髄液蛋白 / LC/MS / GC/MS / LC/MS / GC/MS
Outline of Research at the Start

薬物中毒死を診断するために有用な死後画像所見を明らかにする。
そのため、動物実験モデルを作成し、薬物中毒死が生じた際の画像所見を定量評価する。
また、経時的変化を明らかにするため、LC/MS、GC/MSを用いた検査を行い、死後の薬物体内動態を明らかにする。

Outline of Final Research Achievements

Postmortem CT or MRI can be used to provide a reasonable index of suspicion that a drug or toxic substance may have caused death, but there are limitations to its high accuracy. However, the use of postmortem CT or postmortem MRI can provide a highly accurate index of suspicion that death may have been caused by drugs or toxic substances, but this method is limited in its ability to provide a highly accurate diagnosis.
The final year's study revealed that postmortem images can be used to objectively evaluate fatty degeneration of the liver, and that they correlate well with histopathological examination results, and can determine metabolic abnormalities caused by drugs and toxic substances with a high degree of accuracy. Further research is needed.

Academic Significance and Societal Importance of the Research Achievements

死後画像による客観的評価では有所見のみが評価されるが、実務においては無所見であることが死因判定のきっかけになることが多く経験されている。今回研究テーマとした薬毒物中毒では死後画像(特に死後CT)で消化管内の高吸収像が知られているが、等(低)吸収像であった場合も薬毒物中毒が除外できないため、MRIによる成分評価による検討を進めた。蛋白成分評価を行うことは可能との結果を得たが、既存の薬毒物検査に匹敵する高精度の成分分析結果を得るには至らなかった。
死後画像に課せられる役割として薬毒物分析は限定的との結論を得たが、薬毒物以外の死因に果す役割が大きく、今後のさらなる検討が必要と考えられた。

Report

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

    (4 results)

All 2020 Other

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results) Remarks (1 results)

  • [Journal Article] Sample preparation method with ultrafiltration for whole blood thiosulfate measurement2020

    • Author(s)
      Jin Shigeki、Murakami Manabu、Matoba Kotaro、Matoba Tomoko、Haga Sanae、Ozaki Michitaka、Takeuchi Akiko、Hyodoh Hideki
    • Journal Title

      Legal Medicine

      Volume: 47 Pages: 101765-101765

    • DOI

      10.1016/j.legalmed.2020.101765

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] The infusion effect in postmortem lung CT2020

    • Author(s)
      Hyodoh Hideki、Matoba Kotaro、Murakami Manabu、Saito Atsuko、Okuya Nahoko、Matoba Tomoko、Jin Shigeki
    • Journal Title

      Forensic Imaging

      Volume: 20 Pages: 200367-200367

    • DOI

      10.1016/j.fri.2020.200367

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Post-mortem computed tomography in sudden death by asthma2020

    • Author(s)
      Smith Casey、Matoba Kotaro、Hyodoh Hideki、Murakami Manabu、Saito Atsuko、Matoba Tomoko、Okuya Nahoko、Jin Shigeki
    • Journal Title

      Legal Medicine

      Volume: 44 Pages: 101694-101694

    • DOI

      10.1016/j.legalmed.2020.101694

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Remarks] Postmortem Image Interpretation Guideline

    • URL

      https://isfri-elearning.org/?page_id=1886

    • Related Report
      2020 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2023-01-30  

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