JP4639350B2 - 電流双極子の位置および方向の推定方法 - Google Patents
電流双極子の位置および方向の推定方法 Download PDFInfo
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- JP4639350B2 JP4639350B2 JP2004245926A JP2004245926A JP4639350B2 JP 4639350 B2 JP4639350 B2 JP 4639350B2 JP 2004245926 A JP2004245926 A JP 2004245926A JP 2004245926 A JP2004245926 A JP 2004245926A JP 4639350 B2 JP4639350 B2 JP 4639350B2
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Description
以上の手順により推定を行った脳電位計測による脳活動部位と、図12に示すペンフィールドの脳の機能局在図を比較すると、ペンフィールドの脳の機能局在図とほぼ一致する結果となった。
2 画素群
3 脳磁界計測システム
4 大脳皮質
5 ベクトル群
6 単位法線ベクトル
7 デュワー
8 デュワー部
9 センサー部
10 コイル
11 トリガー
12 脳表
13 活動電流
14 立方画素群
15 磁界
21 脳質
22 脳髄液
23 頭蓋骨
24 頭皮
Claims (4)
- 脳の活動により発生する電流双極子が分布する位置と方向と大きさを推定する電流双極子の推定方法であって、
前記脳の画像を取得して脳表画素を特定するステップと、
それぞれの前記脳表画素について脳外に向かう単位法線ベクトルを算出し、該単位法線ベクトルの位置及び方向をそれぞれ前記電流双極子が分布する位置及び方向と仮定し、該電流双極子の位置及び方向に限定して前記単位法線ベクトルを用いて前記電流双極子の大きさの分布を求めるステップと、
を具備することを特徴とする電流双極子の推定方法。 - 脳の活動により発生する電流双極子が分布する位置と方向と大きさを推定する電流双極子の推定方法であって、
前記脳の画像を取得するステップと、
前記画像を脳内と脳外の判別が可能な複数の画素に分割し、行×列の前記画素からなる画素群を構成するステップと、
上下に連続する複数の前記画素群から脳外と脳内を判別し脳表画素を特定するステップと、
前記脳表画素を中心とした行×列×段の前記画素からなる立方画素群を抽出し、該立方画素群のうちの脳外画素を選択するステップと、
前記脳表画素から前記立方画素群内の前記脳外画素に対する少なくとも1つの単位ベクトルを算出するステップと、
前記各単位ベクトルの和を正規化して前記脳表画素の単位法線ベクトルを算出し、それぞれの前記脳表画素の前記単位法線ベクトルの位置及び方向を電流双極子が分布する位置および方向と仮定し、該電流双極子の位置及び方向に限定して該電流双極子の大きさの分布を算出するステップと、
を具備することを特徴とする電流双極子の推定方法。 - 前記脳表画素は、脳外の前記画素に隣接する脳内の前記画素で構成されることを特徴とする請求項2に記載の電流双極子の推定方法。
- 前記立方画素群は3行×3列×3段の27画素からなることを特徴とする請求項2に記載の電流双極子の推定方法。
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JP2004245926A JP4639350B2 (ja) | 2004-08-25 | 2004-08-25 | 電流双極子の位置および方向の推定方法 |
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JP2004245926A JP4639350B2 (ja) | 2004-08-25 | 2004-08-25 | 電流双極子の位置および方向の推定方法 |
Publications (2)
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JP2006061321A JP2006061321A (ja) | 2006-03-09 |
JP4639350B2 true JP4639350B2 (ja) | 2011-02-23 |
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JP2004245926A Expired - Fee Related JP4639350B2 (ja) | 2004-08-25 | 2004-08-25 | 電流双極子の位置および方向の推定方法 |
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Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5252383B2 (ja) * | 2007-02-06 | 2013-07-31 | 公立大学法人広島市立大学 | 生体内電流双極子の推定方法 |
JP4836140B2 (ja) * | 2007-03-23 | 2011-12-14 | 独立行政法人産業技術総合研究所 | 脳活動解析方法および装置 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08257004A (ja) * | 1995-03-24 | 1996-10-08 | Honma Saburo | 双極子の推定方法 |
JP2005169087A (ja) * | 2003-11-19 | 2005-06-30 | Hiroshima Industrial Promotion Organization | 神経細胞刺激部位の推定方法およびそれを用いた脳機能解析装置 |
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Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08257004A (ja) * | 1995-03-24 | 1996-10-08 | Honma Saburo | 双極子の推定方法 |
JP2005169087A (ja) * | 2003-11-19 | 2005-06-30 | Hiroshima Industrial Promotion Organization | 神経細胞刺激部位の推定方法およびそれを用いた脳機能解析装置 |
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