• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Development of transcranical four-dimensional ultrasound imaging

Research Project

Project/Area Number 20H04543
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 90130:Medical systems-related
Research InstitutionTohoku University

Principal Investigator

Saijo Yoshifumi  東北大学, 医工学研究科, 教授 (00292277)

Co-Investigator(Kenkyū-buntansha) 片山 統裕  尚絅学院大学, 総合人間科学系, 教授 (20282030)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2022: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2021: ¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000)
Fiscal Year 2020: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Keywords超音波 / 経頭蓋 / 4次元 / マウス / 微小血流 / 4次元 / 微小血管 / 脳
Outline of Research at the Start

脳の病態生理解明には、CT、MRI、PETなど既存の医用イメージングに加えて、高空間+高時間分解能とリアルタイム性を実現した手法が必要である。これらの条件をすべて備えた超音波は新たな脳機能診断モダリティーとなることが期待されるが、従来は頭蓋骨における超音波の減衰や屈折により脳の微細構造および微小血流の診断は不可能とされてきた。
本研究では、その限界を打破すべく、比較的頭蓋骨を透過しやすい低周波数超音波と新たに開発する256ch半球状アレイトランスデューサ、さらに高解像度を実現する信号処理を行うことで、リアルタイムに脳微小血管の血流可視化を行う経頭蓋超音波4次元イメージングを開発する。

Outline of Final Research Achievements

In order to observe the micro blood flow in the mouse brain through the skull, we developed three-dimensional imaging using a low-frequency hemispherical array ultrasonic transducer and an algorithm and filter for visualizing microvessels.
The STA using 28 out of 256 elements of the hemispherical array transducer realized a high frame rate and obtained clear and uniform images equivalent to the full-element STA.
Singular value decomposition of the temporal and spatial characteristics of ultrasound signal succeeded in automatically distinguishing between tissue and micro blood flow, and high-resolution microvasculature imaging was realized with a top-hat filter that clearly detected micro blood flow.

Academic Significance and Societal Importance of the Research Achievements

「21世紀は脳科学の時代」と言われてほぼ20年が経過したが、脳機能には依然として未解明な部分が多い。脳機能評価方法として時間および空間分解能を両立し、脳全体をリアルタイムに評価可能な臨床的モダリティーの開発が重要である。したがって、高空間分解能を有し、かつリアルタイム性や小動物の行動分析に必要なポータビリティーをもつ超音波診断に対する期待は大きい。本研究における経頭蓋で3次元イメージングを行い、微小血流を観察する手法の原理検証により、サイズや周波数をヒトの脳に最適化することで、日本発の臨床用経頭蓋超音波診断装置を開発し世界展開することが期待される。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (10 results)

All 2023 2022 2021 Other

All Journal Article (6 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 6 results,  Open Access: 6 results) Presentation (3 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results) Remarks (1 results)

  • [Journal Article] Ultrasound flow phantom for transcranial Doppler: An assessment of angular mismatch effect on blood velocity measurement in comparison to optical particle image velocimetry2023

    • Author(s)
      Hashuro M.S.S, Daibo K, Ishii T, Saijo Y, Ohta M
    • Journal Title

      Frontiers in Physics

      Volume: 11 Pages: 1134588-1134588

    • DOI

      10.3389/fphy.2023.1134588

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] High-speed optical resolution photoacoustic microscopy with MEMS scanner using a novel and simple distortion correction method2022

    • Author(s)
      Shintate R, Ishii T, Ahn J, Kim JM, Kim C, Saijo Y
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 9221-9221

    • DOI

      10.1038/s41598-022-12865-3

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Region-based SVD Processing of High-frequency Ultrafast Ultrasound to Visualize Cutaneous Vascular Networks2022

    • Author(s)
      Bhatti A, Ishii T, Kanno N, Ikeda H, Funamoto K, Saijo Y
    • Journal Title

      Ultrasonics

      Volume: 129 Pages: 106907-106907

    • DOI

      10.1016/j.ultras.2022.106907

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 3D ultrasound imaging by synthetic transmit aperture beamforming using a spherically curved array transducer2022

    • Author(s)
      Eiki Hayashi, Naoya Kanno, Ryo Shintate, Takuro Ishii, Ryo Nagaoka and Yoshifumi Saijo
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 62 Issue: SG Pages: SG1034-SG1034

    • DOI

      10.35848/1347-4065/ac51c1

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Estimation of retinotopic map of awake mouse brain based upon retino-cortical response model2021

    • Author(s)
      R. Togawa, M. Nakao, N. Katayama
    • Journal Title

      Annu Int Conf IEEE Eng Med Biol Soc. 2021

      Volume: - Pages: 4092-4094

    • DOI

      10.1109/embc46164.2021.9630950

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A Micro-flow Phantom for Superficial Micro-vasculature Imaging2021

    • Author(s)
      Bhatti A, Ishii T, Saijo Y
    • Journal Title

      J. Phys.: Conf. Ser

      Volume: 2071 Issue: 1 Pages: 012054-012054

    • DOI

      10.1088/1742-6596/2071/1/012054

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Optical/Photoacoustic Hybrid Microscopy For Visualizing Morphology And Composition Of Cells2022

    • Author(s)
      Yoshifumi Saijo, Ryo Shintate, Takuro Ishii, Ryo Nagaoka
    • Organizer
      IEEE International Ultrasonics Symposium 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Development of an Imaging Framework for Visualization of Cutaneous Micro-Vasculature by using High Frequency Ultrafast Ultrasound Imaging2022

    • Author(s)
      Anam Bhatti, Naoya Kanno, Hayato Ikeda, Takuro Ishii, Yoshifumi Saijo
    • Organizer
      The 44th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Compressed Sensing for Faster Optical-resolution Photoacoustic Microscopy: A Simulation Framework2022

    • Author(s)
      I Gede Eka Sulistyawan, Daisuke Nishimae, Takuro Ishii, Yoshifumi Saijo
    • Organizer
      The 43rd Symposium on Ultrasonic Electronics (USE 2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Remarks] 西條研究室 Saijo Lab

    • URL

      https://www.ecei.tohoku.ac.jp/imaging/

    • Related Report
      2022 Annual Research Report

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi