| Presentation | 2015-09-24 Improvement of Cortical Dipole Imaging Based on Filtering Property Approximated by Sigmoid Function Shintaro Takasawa, Junichi Hori, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Cortical dipole imaging has been proposed as a method to visualize electroencephalogram (EEG) in high spatial resolution. In the present study, we aimed to improve the accuracy of the cortical dipole imaging by focusing on the filtering property when solving the inverse problem. We proposed an inverse filter that optimizes the filtering property using a sigmoid function. The ability of the proposed inverse filter was compared with the traditional methods, such as Tikhonov regularization, the truncated singular value decomposition (TSVD), and the truncated total least squares (TTLS) in a computer simulation. The proposed inverse filter was applied to human experimental data of visual evoked potentials. As a result, the estimation accuracy was improved by our method. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | EEG / cortical dipole imaging / filtering property / filter factor / sigmoid function |
| Paper # | MBE2015-25 |
| Date of Issue | 2015-09-17 (MBE) |
| Conference Information | |
| Committee | MBE |
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| Conference Date | 2015/9/24(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Nagaoka University of Technology |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Tetsuo Kobayashi(Kyoto Univ.) |
| Vice Chair | Yutaka Fukuoka(Kogakuin Univ.) |
| Secretary | Yutaka Fukuoka(akita noken) |
| Assistant | Takenori Oida(Kyoto Univ.) / Ryota Horie(Shibaura Inst. of Tech.) |
| Paper Information | |
| Registration To | Technical Committee on ME and Bio Cybernetics |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Improvement of Cortical Dipole Imaging Based on Filtering Property Approximated by Sigmoid Function |
| Sub Title (in English) | |
| Keyword(1) | EEG |
| Keyword(2) | cortical dipole imaging |
| Keyword(3) | filtering property |
| Keyword(4) | filter factor |
| Keyword(5) | sigmoid function |
| 1st Author's Name | Shintaro Takasawa |
| 1st Author's Affiliation | Niigata University(Niigata Univ.) |
| 2nd Author's Name | Junichi Hori |
| 2nd Author's Affiliation | Niigata University(Niigata Univ.) |
| Date | 2015-09-24 |
| Paper # | MBE2015-25 |
| Volume (vol) | vol.115 |
| Number (no) | MBE-229 |
| Page | pp.pp.1-6(MBE), |
| #Pages | 6 |
| Date of Issue | 2015-09-17 (MBE) |