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Development of an Optical-Based Mechanical Properties Microscope for Observing Cultured Cells

Research Project

Project/Area Number 21K18076
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 90130:Medical systems-related
Research InstitutionHamamatsu University School of Medicine

Principal Investigator

Tamura Kazuki  浜松医科大学, 光尖端医学教育研究センター, 助教 (40822614)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords計測工学 / 生体計測 / 光音響効果 / 熱弾性波 / 硬さ計測 / レーザー超音波 / 機械物性計測 / 光干渉計 / 光音響 / 弾性イメージング / 高周波超音波 / 光イメージング
Outline of Research at the Start

本研究では、一般的な顕微鏡と同じ操作性で硬さを計測する機械物性顕微鏡を開発し、生物研究の場に提供することを目指す。
炎症やがん化に伴い組織の硬さが変化することが知られており、臨床で広く用いられている。しかし、細胞スケールにフォーカスした研究は,硬さ計測の難しさから一般的とは言えず、参入のハードルが高い。細胞の硬さ計測で使用される原子間力顕微鏡や超音波顕微鏡は細胞の破壊の危険性や操作の難しさから、一般的な生物の研究室に導入することは容易ではない。そこで、本研究では細胞観察用の顕微鏡とレーザー光を用いて簡便な硬さ計測を可能とする機械物性顕微鏡を開発し、培養細胞の計測を行い既存手法と比較する。

Outline of Final Research Achievements

Clinical evaluations of diseases based on the "stiffness" of living tissues are commonly used. However, in the field of basic research, there are few simple methods for measuring the stiffness of cells and tissues. We aim to develop a stiffness microscope that combines optical excitation and vibration measurement to achieve simple stiffness measurements using existing optical microscopes.
In this study, we constructed a polarization Michelson interferometer and a polarization Sagnac interferometer to realize optical vibration measurement through optical interferometry. We demonstrated that it is possible to measure pulse vibrations induced by optical excitation. Based on these findings, we aim to achieve high-speed and accurate two-dimensional measurements for cell analysis.

Academic Significance and Societal Importance of the Research Achievements

本研究の成果は、生体計測における硬さ計測の簡便化に寄与し、非侵襲かつ簡便な計測の実現に貢献すると考えられる。また、本研究で使用した光加振と光振動計測を組み合わせた手法は、レーザ超音波技術として1980年代に大規模構造物向けに開発された技術である。本研究の成果は、従来よりも小さなエネルギーでかつ顕微鏡観察下の小さなサンプルに対して当該技術を応用する基盤となり得る。よって、今後微細構造等へのレーザー超音波技術の応用に活用されることが期待される。

Report

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

    (17 results)

All 2024 2023 2022 2021

All Journal Article (2 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (12 results) (of which Int'l Joint Research: 5 results) Book (1 results) Patent(Industrial Property Rights) (2 results)

  • [Journal Article] Thermoelastic wave generation and its longitudinal wave propagation measurement by a microscopic optical interferometer2024

    • Author(s)
      Tamura Kazuki、Hashimoto Ken-ya、Okawa Shinpei
    • Journal Title

      Ultrasonics

      Volume: 141 Pages: 107319-107319

    • DOI

      10.1016/j.ultras.2024.107319

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Alteration of speed-of-sound by fixatives and tissue processing methods in scanning acoustic microscopy2023

    • Author(s)
      Tamura Kazuki、Ito Kazuyo、Yoshida Sachiko、Mamou Jonathan、Miura Katsutoshi、Yamamoto Seiji
    • Journal Title

      Frontiers in Physics

      Volume: 11 Pages: 1-9

    • DOI

      10.3389/fphy.2023.1060296

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Fully Optic Characterization of Acoustic Impedance Implementable in Conventional Optical Microscope2023

    • Author(s)
      Kazuki Tamura, Shinpei Okawa
    • Organizer
      Acoustics 23
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Fully optic characterization of acoustic impedance implementable in optical microscope2023

    • Author(s)
      Kazuki Tamura, Ken-ya Hashimoto, Shinpei Okawa
    • Organizer
      The 44th Symposium on Ultrasonic Electronics (USE 2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of Mechanical Property Microscopy Using Photoacoustic Excitation and Optical Interferometry2023

    • Author(s)
      Kazuki Tamura, Ken-ya Hashimoto, Sinpei Okawa
    • Organizer
      47th Annual International Symposium on ULTRASONIC IMAGING AND TISSUE CHARACTERIZATION
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of the nanosecond pulsed photoacoustic wave detection system by using optical interferometry2023

    • Author(s)
      Kazuki Tamura, Ken-ya Hashimoto, Shinpei Okawa
    • Organizer
      The 43nd Symposium on UltraSonic Electronics
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Examination of temperature dependence in speed of sound evaluation of rat organs2022

    • Author(s)
      Suguru Seto, Kazuki Tamura, Shinnosuke Hirata, Kenji Yoshida, Tadashi Yamaguchi
    • Organizer
      The 43nd Symposium on UltraSonic Electronics
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 光学式機械物性計測のための光干渉を用いた光音響波検出システムの構築2022

    • Author(s)
      田村 和輝, 橋本 研也, 大川 晋平
    • Organizer
      日本音響学会第148回(2022年秋季)研究発表会
    • Related Report
      2022 Research-status Report
  • [Presentation] 凍結試料の音速評価における温度依存性の検討2022

    • Author(s)
      瀬戸 駿, 田村 和輝, 平田 慎之介, 吉田 憲司, 山口 匡
    • Organizer
      日本音響学会第148回(2022年秋季)研究発表会
    • Related Report
      2022 Research-status Report
  • [Presentation] マイクロメートルスケールの空間分解能を持つ硬さイメージング法の開発2022

    • Author(s)
      田村和輝
    • Organizer
      第4回 静岡県大学研究連携シンポジウム
    • Related Report
      2022 Research-status Report
  • [Presentation] 生体組織用光学式機械物性顕微鏡の開発2022

    • Author(s)
      田村和輝
    • Organizer
      令和4年度 電気・電子・情報関係学会東海支部連合大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 機械物性顕微鏡の構築を目指した光学式光音響信号の計測システムの構築2022

    • Author(s)
      田村 和輝, 橋本 研也, 大川 晋平
    • Organizer
      超音波研究会
    • Related Report
      2022 Research-status Report
  • [Presentation] 光干渉を用いた光音響信号計測手法の開発2022

    • Author(s)
      田村 和輝, 橋本 研也, 山本 清二
    • Organizer
      日本音響学会2022年春季研究発表会
    • Related Report
      2021 Research-status Report
  • [Presentation] Development of optical interferometer for optical-based mechanicalproperty microscope2021

    • Author(s)
      Kazuki Tamura, Ken-ya Hashimoto, Seiji Yamamoto
    • Organizer
      The 42th Symposium on UltraSonic Electronics
    • Related Report
      2021 Research-status Report
  • [Book] 超音波テクノ 2023年7-8月号2023

    • Author(s)
      田村和輝
    • Total Pages
      4
    • Publisher
      日本工業出版
    • Related Report
      2023 Annual Research Report
  • [Patent(Industrial Property Rights)] 光音響波発生シート,光音響計測方法,光学的硬さ計測方法2023

    • Inventor(s)
      田村和輝
    • Industrial Property Rights Holder
      浜松医科大学
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2023-095127
    • Filing Date
      2023
    • Related Report
      2023 Annual Research Report
  • [Patent(Industrial Property Rights)] 光音響計測装置,光音響計測法,光学顕微鏡用の後付け光音響計測ユニット2021

    • Inventor(s)
      田村和輝
    • Industrial Property Rights Holder
      国立大学法人浜松医科大学
    • Industrial Property Rights Type
      特許
    • Filing Date
      2021
    • Related Report
      2021 Research-status Report

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

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