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Near-infrared photoacoustic imaging instrument with spatial light modulation and its application to medical diagnosis

Research Project

Project/Area Number 17H03082
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Analytical chemistry
Research InstitutionTokyo University of Science

Principal Investigator

Yui Hiroharu  東京理科大学, 理学部第一部化学科, 教授 (20313017)

Co-Investigator(Kenkyū-buntansha) 浦島 周平  東京理科大学, 研究推進機構総合研究院, 助教 (30733224)
森作 俊紀  東京理科大学, 研究推進機構総合研究院, 助教 (00468521)
伴野 元洋  東京理科大学, 理学部第一部化学科, 講師 (40432570)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
Fiscal Year 2019: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2018: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2017: ¥9,880,000 (Direct Cost: ¥7,600,000、Indirect Cost: ¥2,280,000)
Keywords光音響効果 / 時間波形 / パワースペクトル / 弾性 / 乳がん / 空間位相変調 / 波形解析アルゴリズム / 近赤外光 / 光音響 / 粘弾性 / 空間位相変調技術 / イメージング / 近赤外 / レオロジー
Outline of Final Research Achievements

For the development of a novel instrument for medical diagnosis, we focused on the difference in elasticity between normal and pathological tissues. We investigated with an algorithm for waveform analysis whether the elasticity of objects buried into media was characterized from the temporal waveforms of photoacoustic signals and the corresponding power spectra. As the increase in Young’s moduli of the objects, it was clarified that the frequency corresponding to the gravitational center of the power spectra became higher. In our experimental configuration, the elasticity of the objects was identified up to about 1 MPa of Young’s modulus from the frequency, which corresponded to the range of elasticity for mammary gland cancers. Moreover, we achieved the multi-focus of an incident near-infrared laser light, where the diameter of a laser spot was a few micrometer, with the spatial light modulation technique, for fast near-infrared photoacoustic imaging of buried biological tissues.

Academic Significance and Societal Importance of the Research Achievements

生体組織の弾性は、これまで、超音波エラストグラフィによって計測されてきた。しかし当該手法では、皮膚表面から5 から10 cmの深さ領域の組織の弾性が計測可能であるが、用いる音波の波長から空間分解能が1 cmと低い欠点がある。本研究で開発した光音響信号のパワースペクトルから埋もれた物体の弾性情報を取得する新しい方法は、サブミリメートルの空間分解能を達成することができ、かつ血管などの組織を選択的に弾性をイメージング計測可能である。このことは、超音波エラストグラフィでは困難であった早期の乳がんのようなサブミリメートルオーダーの小さな病変を弾性情報から診断する新しい方法に発展していくことが期待できる。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (9 results)

All 2019 2018

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 4 results) Presentation (4 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Development of a Near-infrared Laser-induced Surface Deformation Microscope and Its Application to the Dynamic Viscoelastic Measurements of Single Living Plant Cell Surfaces2019

    • Author(s)
      Toshinori Morisaku, Hitomi Onuki, Kenji Hashimoto, Kazuyuki Kuchitsu, Hiroharu Yui
    • Journal Title

      Analytical Sciences

      Volume: 35 Issue: 11 Pages: 1203-1207

    • DOI

      10.2116/analsci.19P227

    • NAID

      130007743101

    • ISSN
      0910-6340, 1348-2246
    • Year and Date
      2019-11-10
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Measurement of Water Distribution on Micro-structured Surface Buried in Water as a Model of Super Water Repellent Surface by Stimulated Raman Scattering Interferometer2019

    • Author(s)
      Motohiro Banno, Sumire Takahashi, Hiroharu Yui
    • Journal Title

      Analytical Sciences

      Volume: 35 Issue: 8 Pages: 911-915

    • DOI

      10.2116/analsci.19P060

    • NAID

      130007689351

    • ISSN
      0910-6340, 1348-2246
    • Year and Date
      2019-08-10
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Mechanical Properties of the Coat Protein Layer and Cortex in Single <i>Bacillus subtilis</i> Spores Studied with an Atomic Force Microscope and Laser-induced Surface Deformation Microscope2019

    • Author(s)
      MORISAKU Toshinori、KIDO Yuriko、ASAI Kei、YUI Hiroharu
    • Journal Title

      Analytical Sciences

      Volume: 35 Issue: 1 Pages: 45-48

    • DOI

      10.2116/analsci.18SDP02

    • NAID

      130007554864

    • ISSN
      0910-6340, 1348-2246
    • Year and Date
      2019-01-10
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Discrimination between Normal and Cancerous Cells from Dynamic Viscoelastic Properties with a Laser-induced Surface Deformation Microscope2018

    • Author(s)
      MORISAKU Toshinori、ISHIHARA Masashi、YUI Hiroharu
    • Journal Title

      Analytical Sciences

      Volume: 34 Issue: 8 Pages: 979-982

    • DOI

      10.2116/analsci.18P170

    • NAID

      130007432100

    • ISSN
      0910-6340, 1348-2246
    • Year and Date
      2018-08-10
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Laser-induced surface deformation microscope for the study of the dynamic viscoelasticity of plasma membrane in a living cell2018

    • Author(s)
      Morisaku Toshinori、Yui Hiroharu
    • Journal Title

      The Analyst

      Volume: 143 Issue: 10 Pages: 2397-2404

    • DOI

      10.1039/c7an01620d

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] レーザー光音響分光法を用いた生体組織深部レオロジー計測2019

    • Author(s)
      中 彩香、木村 真衣子、森作 俊紀, 浦島 周平, 由井 宏治
    • Organizer
      第41回日本バイオマテリアル学会大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] レーザー光音響分光法を用いた毛細血管模擬試料の弾性計測2019

    • Author(s)
      木村 真衣子、中 彩香、森作 俊紀, 浦島 周平, 由井 宏治
    • Organizer
      第41回日本バイオマテリアル学会大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Development of the laser-induced surface deformation microscope for the study of dynamic viscoelastic properties of soft interfaces2018

    • Author(s)
      Toshinori Morisaku and Hiroharu Yui
    • Organizer
      Water on Materials Surface 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 細胞膜の動的粘弾性計測の高速化のためのフーリエ変換型レーザー誘起表面変位顕微鏡の開発2018

    • Author(s)
      坂東 龍、森作 俊紀, 伴野 元洋, 由井 宏治
    • Organizer
      第67回分析化学会年会
    • Related Report
      2018 Annual Research Report

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Published: 2017-04-28   Modified: 2021-02-19  

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