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HIGH RESOLUTION MEASUREMENTS OF OPTICAL TOMOGRAPHY IN SCATTERING MEDIUM

Research Project

Project/Area Number 09450170
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 計測・制御工学
Research InstitutionKOBE UNIVERSITY

Principal Investigator

YOSHIMURA Takeaki  Kobe University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (70031127)

Co-Investigator(Kenkyū-buntansha) NAKAGAWA Kiyoshi  Kobe University, Faculty of Engineering, Research Associate, 工学部, 助手 (50198032)
MINEMOTO Takumi  Kobe University, Faculty of Engineering, Professor, 工学部, 教授 (60031093)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥13,200,000 (Direct Cost: ¥13,200,000)
Fiscal Year 1998: ¥4,200,000 (Direct Cost: ¥4,200,000)
Fiscal Year 1997: ¥9,000,000 (Direct Cost: ¥9,000,000)
Keywordstomography / near infrared / 3-D measurement / laser diode / high resolution / optical frequency modulation / tissue / strong scattering medium / 近赤外 / 3次元測定 / フーリエ変換
Research Abstract

Optical coherence tomography based on an optical frequency reflectometry has been developed. The system has been applied to measurements of reflectivity behind chiken tissue. The main results are shown as followings.
(1) The optical frequency of tunable laser source can be linearly scanned upto 10 THz during 2 seconds without a mode-hoppe effect.
(2) The data processing system with a CCD camera can be time-sequentially stored to memories of 512 frames, and be Fourier-transformed every pixel-data.
(3) The depth resolution of this system is 47 mum for five minutes of short analyzing time by using the fast Fourier transform method.
(4) The optical system which is constructed of two-lens system is inserted in the Micherlson interferometer. By using this system and an optical heterodyne system, the strong diffuse light from the scattering media was rejected to 10^<-9> of incident light intensity.
(5) The system can measure three-dimensionally the reflectivity distribution inside strong scattering media from the surface to the depth of a few millimeters.
(6) The reflectivity behind a chiken tissue was measured with measuring time of 2 seconds. From the results, the present system is available to three-dimensional reflectivity distribution measurements.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 手塚 哉: "Simultaneous measurements of 3D reflectivity distributions in scattering media based on OFDR" Opt.Lett.23. 1420-1422 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 吉村 武晃: "Optical coherence tomography in scattering media using a continuous wave tunable laser diode" Proc.of SPIE. 3479. 207-214 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 吉村 武晃: "光散乱トモグラフィ" 精密工学会誌. 64. 1274-1278 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Hajime Hiratsuka: "Simultaneous measurements of three-dimensional reflectivity distributions in scattering mediabased on optical frequency-domain reflectometry." Opt.Lett.Vol.23, No.18. 1420-1422 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] T.Yoshimura: "Optical coherence tomography in scattering media using a continuous wave tunable laser diode." Proc.of SPIE. Vol.3479. 207-214 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 平塚哉: "Simul taneous measurements of 3-D reflectirity distributins in scattering nedia based on OFDR" Opt.Lett.23,18. 1420-1422 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 吉村武晃: "Optical coherence tomograply in scattering medea using a continuous wave tanable laser dicde" Proc.of SPIE. 3479. 207-214 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 吉村武晃: "光散乱トモグラフィ" 精密工学会誌. 64,9. 1274-1278 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 吉村, 将積, 重松: "Imaging a Reflecting Plate Locating in Scattering Media" Optical Review. 4・1B. 221-227 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 吉村, 角谷, 城戸: "Tomographic Imaging System of Reflectance in Scattering Media" Proc.9th Int.Conf.on Bio.Eng.399-401 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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