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Development of three-dimensionally measuring instrument of ocular fundus

Research Project

Project/Area Number 04452105
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 物理計測・光学
Research InstitutionKobe University

Principal Investigator

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

Co-Investigator(Kenkyū-buntansha) NAKAGAWA Kiyoshi  Kobe University, Department of Instrumentation Engineering, Research Assosiate, 工学部, 助手 (50198032)
MINEMOTO Takumi  Kobe University, Department of Instrumentation Engineering, Professor, 工学部, 教授 (60031093)
Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥5,600,000 (Direct Cost: ¥5,600,000)
Fiscal Year 1993: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1992: ¥4,300,000 (Direct Cost: ¥4,300,000)
Keywords3-D Measurement of Ocular Fundus / Diagnosis of Glaucoma / Grating Projection Method / C / D Ratio and Rim Width / Visual Field Defects / Neural Network / ニューラルネットワーク / 乳頭陥凹 / 眼底カメラ
Research Abstract

In order to achieve clinical diagnosis of glaucomatous eyes at early stage, new developments of the three dimensionally measuring ocular fundus camera and the data processing system of images obtained by a pattern projected method have been done in this reserch project. The results are shown as follows :
1. The improvements of the comercial ocular fundus camera (Kowa, type fx-50c) have achieved to take grating images of high contrast, even if its system is applied to any patients.
2. Developments of the image processing system have achieved to analyze automatically the contour map of an optic nerve head. Consequently, the standard deviation of the excavation depth was obtained within 15%.
3. By analysing two parameters of the cup-disc area ratio (C/D ratio) and the average depth of the cup area, it is found that the amount deduced from the two parameters does not depends on the different patients and can estimeate the grade of the glaucoma.
4. The narrowing of the rim width strongly depends on the field defects at the corresponding direction.
5. The neural network is possible to do the resulting estimation of 10 parameters, which is the rim widths at the 8 directions, the average depth and the C/D ratio. The results can estimate the glaucomatous eye at early stage without visual field defects.

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] 吉村武晃: "格子像投影法による乳頭陥凹の測定" 視覚の科学. 13. 11-16 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 中谷一: "緑内障における乳頭陥凹とGoldman視野" あたらしい眼科. 9. 801-806 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 吉村武晃: "緑内障早期診断への格子投影法の応用開発" 病体生理. 11. 518-523 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 吉村武晃: "乳頭の定量立体計測" あたらしい眼科. 10. 157-159 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 吉村武晃: "眼府の定量立体計測法の開発" あたらしい眼科. 10. 191-196 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 吉村武晃: "ニューラルネットワークを利用した乳頭陥凹形状からの緑内障評価法" 視覚の科学. 14. 76-81 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Yoshimura, H.Nakatani and N.Suzuki: "Topographic Measurements of the Ocular Fundus by Means of Recording Projected Grating Images" Jpaanese Journal of Visual Science. Vol.13. 11-16 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Nakatani, T.Yoshimura and N.Suzuki: "Relationship between Disc Cup Lines and Glaucomatous Visual Field" Journal of the Eye. Vol.9, No.5. 801-806 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Yoshimura, H.Nakatani and N.Suzuki: "Topographic Measurements of the Ocular Fundus" Medicina Philosophica. Vol.11, No.7. 518-523 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Yoshimura, H.Nakatani and N.Suzuki: "Topographic Measurements of the Ocular Fundus" Journal of the Eye. Vol.10, No.1. 157-159 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Yoshimura and N.Suzuki: "Development of 3-D Fundus Camera" Journal of the Eye. 21GE05 : Vol.10, No.2. 191-196 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Yoshimura, H.Nakatani and N.Suzuki: "Estimation of Glaucomatous Visual Field Defects from Optic Disc Excavation with a Neural Network" Japanese Journal of Visual Science. Vol.134, No.2. 76-81 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 吉村武晃: "格子像投影法による乳頭陥凹の測定" 視覚の科学. 13. 11-16 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] 中谷一: "緑内障における乳頭陥凹とGoldman視野" あたらしい眼科. 9. 801-806 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] 吉村武晃: "緑内障早期診断への格子投影法の応用開発" 病体生理. 11. 518-523 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] 吉村武晃: "乳頭の定量立体計測" あたらしい眼科. 10. 157-159 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 吉村武晃: "眼底の定量立体計測法の開発" あたらしい眼科. 10. 191-196 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 吉村武晃: "ニューラルネットワークを利用した乳頭陥凹形状からの緑内障評価法" 視覚の科学. 14. 76-81 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 中谷 一: "緑内障における乳頭陥凹とGoldmann視野" あたらしい眼科. 9. 801-806 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 吉村武晃: "格子像投影法による乳頭陥凹の測定" 視覚の科学. 13. 11-16 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 吉村 武晃: "緑内障早期診断への格子投影法の応用開発" 病態生理. 11. 518-523 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 吉村 武晃: "乳頭の定量立体計測" あたらしい眼科. 10. (1993)

    • Related Report
      1992 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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