| アブストラクト | A system is described for the removal of eye movement and blink artefacts from single channel pattern reversal electroretinogram recordings of very poor signal-to-noise ratios. Artefacts are detected and removed by using a blind source separation technique based on the jadeR independent component analysis algorithm. The single channel data are arranged as a series of overlapping time-delayed vectors forming a dynamical embedding matrix. The structure of this matrix is constrained to the phase of the stimulation epoch: the term synchronous dynamical embedding is coined. A novel method using a marker channel with a non-independent synchronous feature is employed to identify the single most relevant source estimation for reconstruction and signal recovery. This method is non-lossy, all underlying signal being recovered. In synthetic datasets of defined noise content and in standardised real data recordings, the performance of this technique is compared to conventional fixed-threshold hard-limit rejection. The most significant relative improvements are achieved when movement and blink artefacts are greatest: no improvement is demonstrable for the random noise only situation. |
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| ジャーナル名 | Medical & biological engineering & computing |
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| 投稿日 | 2006/12/02 |
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| 投稿者 | Fisher, A C; El-Deredy, W; Hagan, R P; Brown, M C; Lisboa, P J G |
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| 組織名 | Department of Clinical Engineering, Royal Liverpool University Hospital, Medical;School, Duncan Building, Prescot Street, Liverpool L78XP, UK.;a.c.fisher@liv.ac.uk |
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| Pubmed リンク | https://www.ncbi.nlm.nih.gov/pubmed/17139516/ |
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