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Wavelength sweeping for quick acisition of an optical coherence tomography image

Research Project

Project/Area Number 20K21878
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 90:Biomedical engineering and related fields
Research InstitutionGunma University

Principal Investigator

Chiba Akito  群馬大学, 大学院理工学府, 准教授 (30435789)

Co-Investigator(Kenkyū-buntansha) 坂本 高秀  東京都立大学, システムデザイン研究科, 准教授 (70392727)
呂 国偉  会津大学, コンピュータ理工学部, 上級准教授 (30599709)
Project Period (FY) 2020-07-30 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2021: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2020: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Keywords光干渉断層像 / 光コヒーレンストモグラフィ / 高速波長掃引
Outline of Research at the Start

周波数走査光干渉断層計は黄斑疾患や緑内障をはじめとする網膜疾患の診断ツールとして不可欠となっているが、断層画像取得における高速化・高精細化は未だに強く望まれている。本研究ではこの実現の鍵となる光源の波長掃引レート(単位時間当たりの掃引回数)増大に向けて、光源の波長選択のしかたに立脚した独自手法を提案し、その検討を行う。

Outline of Final Research Achievements

Swept-Source optical coherence tomography is widely adopted as a diagnostic tool for retinal diseases such as macular diseases and glaucoma. On the other hand, it is still desired to achieve further fast acquision of high-definition tomographic image. The key to achieve this goal would be to increase the wavelength sweep rate (number of sweeps per unit time) of a light source. In this study we propose and investigate an original unique method that is focus on extraction of the lightwave in wavelength axis.

Academic Significance and Societal Importance of the Research Achievements

本研究課題は、眼科における検査のなかでも特に重要となる眼底検査に於いて広く利用される光干渉断層計に関するものである。従来の装置の動作速度は、装置に含まれる光源の構成要素の性能に起因する限界が存在していたのに対し、本研究課題で提案する手法は原理的にその制約を受けないものとなる。得られる知見は断層像取得の所要時間の短縮に繋がることが期待できる点に加え、その結果として取得画像の高精細化に伴う測定データ数の増大に対処できる点からも有用と考えられる。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (8 results)

All 2024 2023 2022 2021 Other

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (3 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results) Remarks (1 results)

  • [Journal Article] Multiple-Frequency-Spaced and -Offset Flat Optical Comb Generation Using Multiple-Parallel Phase Modulator: Theory and Design2022

    • Author(s)
      T. Sakamoto, A. Chiba
    • Journal Title

      Journal of the Optical Society of America B

      Volume: 39(6) Issue: 6 Pages: 1644-1654

    • DOI

      10.1364/josab.455652

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Wavelength-Tunable Optical Two-Tone Signals Generated Using Single Mach-Zehnder Optical Modulator in Single Polarization-Mode Sagnac Interferometer2022

    • Author(s)
      A.Chiba and Y. Akamatsu
    • Journal Title

      Photonics (MDPI)

      Volume: 9 (3) Issue: 3 Pages: 194-194

    • DOI

      10.3390/photonics9030194

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 光の変調と検波を利用する高周波信号の評価2022

    • Author(s)
      千葉 明人
    • Journal Title

      HiKaLo技術情報誌

      Volume: (in press)

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Complex amplitude estimation of monochromatic radio-frequency signal using frequency down conversion via direct detection of interfered optical phase-modulation signals2021

    • Author(s)
      A. Chiba and Y. Sunaga
    • Journal Title

      Optics Letters

      Volume: 46 Issue: 11 Pages: 2646-2649

    • DOI

      10.1364/ol.426425

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] RF parameter estimation assisted by phase modulation and detection of lightwave2024

    • Author(s)
      A. Chiba
    • Organizer
      ICCCAS2024
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] RF Parameter Estimation Using Lightwave modulation2023

    • Author(s)
      A. Chiba
    • Organizer
      ICCCAS2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] RF signal estimation utilizing low-frequency beat signal due to harmonics of phase-modulation lightwave2022

    • Author(s)
      A. Chiba, Y. Sunaga
    • Organizer
      Proc. 15th Pacific Rim Conference on Lasers and Electro-Optics (CLEO-PR2022)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Remarks] Webpage of Akito Chiba

    • URL

      https://chiba.ei.st.gunma-u.ac.jp/

    • Related Report
      2022 Research-status Report 2021 Research-status Report 2020 Research-status Report

URL: 

Published: 2020-08-03   Modified: 2025-01-30  

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