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    請使用永久網址來引用或連結此文件: http://libir.tmu.edu.tw/handle/987654321/21697


    題名: 腦電波訊號源估測
    Electroencephalogram source estimation
    作者: 孫光天;許明哲
    Koun-Tem Sun;Ming-Che Hsu
    日期: 2007
    上傳時間: 2009-11-27 14:50:44 (UTC+8)
    摘要: 腦電波儀(EEG)是常常用來進行腦功能研究的工具之
    一，因為它具有相當高的取樣頻率以及低廉的價位
    ，本研究中，我們將開發出一套系統，把EEG獲得
    的頭皮電位資料，經過電腦處理，來估測目標腦波
    訊號源的位置，本研究所採用的方法，包括了簡單
    的頭模型(球模型)，正向模型的計算，以及最後逆向
    問題計算。其正向模型是假設腦電波訊號源的位置
    和方向是已知的，然後推導出頭皮的電位。逆向問
    題則是由已知的頭皮電極點電位資料求出腦電波訊
    號源的位置及方向；最後以臨床實驗:左右手分別出
    力握拳，來檢驗我們系統所計算的位置是否在運動
    神經區。實驗結果顯示，我們所開發系統的正確率
    可達56%，已具有初步的實用性。
    Electroencephalogram (EEG) is one of the tools widely
    used in functional brain studies due to its high sampling
    rate (temporal resolution) and low cost. In this
    research, we proposed a system which used the scalp
    potential data recorded by EEG to predict the location
    of the target brain wave source. The techniques, used
    in this experiment, included the simple head model, the
    calculation of the forward model and the resolution of
    the inverse problem. The forward model is based on the
    hypothesis that both the brain wave source location and
    the orientation are known, which can be used to infer
    and predict the scalp potential. As for the inverse
    problem, the location and the orientation of brain wave
    source can be measured from the known scalp electrode
    data. Through the clinical trial, we may examine the
    system to see whether the location is shown in the motor
    area of brain by using two hands to hold firmly. The
    results indicate that the accuracy rate of this system can
    be up to 56%, which achieves a preliminary
    practicability.
    顯示於類別:[資訊處] 國際醫學資訊研討會論文集

    文件中的檔案:

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    021_定稿.ps71987KbPostscript35檢視/開啟


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