Automatic noise-level detection for extra-cellular micro-electrode recordings.
Extra-cellular neuro-recording signals used for functional mapping in deep brain stimulation (DBS) surgery and invasive brain computer interfaces, may suffer from poor signal to noise ratio. Therefore, a reliable automatic noise estimate is essential to extract spikes from recordings. We show that c...
| Publicado en: | Medical & Biological Engineering & Computing Vol. 47; no. 7; pp. 791 - 801 |
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| Autores principales: | , , , , , , , |
| Formato: | research Journal Article |
| Publicado: |
Springer Nature
Jul2009
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=104906637&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 104906637 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 01400118 PO0 jtl: Medical & Biological Engineering & Computing issn: 01400118 maglogo: N pubinfo: dt: Jul2009 vid: 47 iid: 7 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 104906637 NLM19468773 2010304526 10.1007/s11517-009-0494-4 NLM19468773 104906637 ppf: 791 ppct: 10 formats: fmt: @attributes: type: P tig: atl: Automatic noise-level detection for extra-cellular micro-electrode recordings. aug: au: Dolan K Martens HC Schuurman PR Bour LJ Dolan, Kevin Martens, H C F Schuurman, P R Bour, L J affil: Philips Research, High Tech Campus 34, 5656 AE, Eindhoven, The Netherlands sug: subj: Artifacts Brain Mapping Electric Stimulation Electrophysiology Methods Parkinson Disease Therapy Signal Processing, Computer Assisted ab: Extra-cellular neuro-recording signals used for functional mapping in deep brain stimulation (DBS) surgery and invasive brain computer interfaces, may suffer from poor signal to noise ratio. Therefore, a reliable automatic noise estimate is essential to extract spikes from recordings. We show that current methods are biased toward overestimation of noise-levels with increasing neuronal activity or artifacts. An improved and novel method is proposed that is based on an estimate of the mode of the distribution of the signal envelope. Our method makes use of the inherent characteristics of the noise distribution. For band-limited Gaussian noise the envelope of the signal is known to follow the Rayleigh distribution. The location of the peak of this distribution provides a reliable noise-level estimate. It is demonstrated that this new 'envelope' method gives superior performance both on simulated data, and on actual micro-electrode recordings made during the implantation surgery of DBS electrodes for the treatment of Parkinson's disease. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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