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1995 Fiscal Year Final Research Report Summary

A Newly Devised Software System for Three-Dimensional Imaging Analysis of Electrical Activity in Brain

Research Project

Project/Area Number 06557027
Research Category

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

Allocation TypeSingle-year Grants
Research Field Hygiene
Research InstitutionHokkaido University

Principal Investigator

KOYAMA Akio  Department of Hygiene and Preventive Medicine, Hokkaido University School of Medicine, Associate professor., 医学部, 助教授 (90215202)

Co-Investigator(Kenkyū-buntansha) EGUCHI Eiji  Neuro Science Co. Ltd. President., 代表取締役
TAKAKURA Masayuki  Department of Hygiene and Preventive Medicine, Hokkaido University School of Med, 医学部, 助手 (90241314)
SAITO Takeshi  Department of Hygiene and Preventive Medicine, Hokkaido University School of Med, 医学部, 講師 (40153811)
SAITO Kazuo  Department of Hygiene and Preventive Medicine, Hokkaido University School of Med, 医学部, 教授 (80000917)
Project Period (FY) 1994 – 1995
KeywordsImage analysis / Visualization / Electrical anctivity in brain / Time series analysis / Neural network
Research Abstract

This study intended to develop a newly devised software sysytem for three dimensional imaging analysis of electrical activity in the brain.
The role of the software system was to represent two dimensinal topographical mappings from 12 channels EEG recording data using maximum entropy spectral analysis (MEM), and the three-dimensional (3D) graphics compressed of these many topographical mappings accompanying time process. The software system was mainly devised from the combination of two application programs on the market, MemCalc system (for MEM and chaos analysis) and Voxel View system (for 3D imaging analysis), and an original program for compiling the data format.
The first step results confirmed that MEM analysis had a superior performance for detecting sufficient power spectrum from biological time series data without any kinds of modification to the native data, and that successful topographical mappings with higher resolution and stability were obtained using MEM than using the popular FFT analysis. Further, as a result of the second step, a new software system providing clear 3D images compressed many mapping data sets drawn as X-axis and Y-axis adding time process as Z-axis was developed. To evaluate the performance of resolution of this system, we demonstrated 3D imaging analysis of time series graphical data of electrical activities in a rat brain using other programs on the market.
These results suggest that our new system is useful to recognize clearly and instantly localized changes of electrical activities in the brain during the time process by only a few graphics, and has the possibility for application of nonlinear analysis for clarifying the mechanisms of time series changes.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 神山昭男: "神経活動の高速な反応を視覚化する光量差分画像解析システム" 中研ニュース. 5. 9-13 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Koyama A, et al.: "Relationship between alpha wave fluctnation and heart rate variability during NERM sleep" Electroenceph. clin. Neurophysiol.97. S245-246 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 神山昭男 他: "VDT作業と高次神経機能" BRAIN MEDICAL. 8,(印刷中). (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 神山昭男 他: "Applications of maximum entropy power spectral analysis to EEG topographic mapping" 第15回日本医用画像工学会発表集. 15,(印刷中). (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Koyama A., et al: "Chaotic phenomena of biological time series data" Noulinear Dynamics, Psychology, And Life. 1,(発表予定). (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Koyama A., et al: "A Recent Advance in Time Series Analysis by Maximum Entropy Method-Applications to Medical and Biological Sciences" Hokkaido University Press, 397 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Koyama, A.: "A digital imaging analysis system for visualization of ultra rapid response in neural activities" News of central research devision. 5. 9-13 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Koyama, A., et al.: "Relationship between alpha wave fluctuation in EEG and heart rate variability during NREM sleep." Electroenceph. clin. Neurophysiol.97. S245-246 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Koyama, A et al.: "VDT work and higher nervous activity" BRAIN MEDICAL. 8 (in press). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Koyama, A et al.: "Applications of maximum entropy power spectral analysis to EEG topohraphic mapping" Proc. of the annual meeting '96 of the Japanese Society of Medical Imaging Technology. 15 (in press). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Koyama, A., et al.: "Chaotic phenomena of bilogical time series data" Nonlinear Dynamics, Psychology and Life Sciences. 1 (in press). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Koyama, A., et al: A Recent Advance in Time Series Analysis by Maximum Entropy Method-Applications to Medical and Biological Science. Saito, K., Koyama, A., et al. eds. Hokkaido University Press, 1-397 (1994)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1997-03-04  

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