| Presentation | 2008-06-27 MEG denoising using simultaneous current estimation of artifacts and cortical activities Ken-ichi MORISHIGE, Dai KAWAWAKI, Taku YOSHIOKA, Masa-aki SATO, Mitsuo KAWATO, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | While measuring magnetoencephalographic (MEG) signals, these are corrupted by large magnetic artifacts, such as cardiac, eye movements, and muscle activities. Since these artifacts are extremely large compared to the signal from the brain, it is essential to remove the effect of artifacts properly. This report proposes a method to identity the magnetic artifacts and remove them using Hierarchical Bayesian estimation. By using proper prior information, we show that this method can estimate current of artifacts and cortical activities, and correct multiple magnetic artifacts. Additionally, our results indicated that our method improves the estimation of cortical current. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | MEG / Hierarchical Bayesian estimation / artifact removal |
| Paper # | NC2008-19 |
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| Committee | NC |
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| Conference Date | 2008/6/19(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Neurocomputing (NC) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | MEG denoising using simultaneous current estimation of artifacts and cortical activities |
| Sub Title (in English) | |
| Keyword(1) | MEG |
| Keyword(2) | Hierarchical Bayesian estimation |
| Keyword(3) | artifact removal |
| 1st Author's Name | Ken-ichi MORISHIGE |
| 1st Author's Affiliation | Toyama Prefectural University() |
| 2nd Author's Name | Dai KAWAWAKI |
| 2nd Author's Affiliation | Computational Neuroscience Labs, ATR |
| 3rd Author's Name | Taku YOSHIOKA |
| 3rd Author's Affiliation | Computational Neuroscience Labs, ATR |
| 4th Author's Name | Masa-aki SATO |
| 4th Author's Affiliation | Computational Neuroscience Labs, ATR |
| 5th Author's Name | Mitsuo KAWATO |
| 5th Author's Affiliation | Computational Neuroscience Labs, ATR |
| Date | 2008-06-27 |
| Paper # | NC2008-19 |
| Volume (vol) | vol.108 |
| Number (no) | 101 |
| Page | pp.pp.- |
| #Pages | 6 |
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