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Functional Brain Signals: A photon counting system for brain activity monitoring

Lebid, S and O'Neill, Ray and Markham, Charles and Ward, Tomas and Coyle, S (2004) Functional Brain Signals: A photon counting system for brain activity monitoring. In: IEE Irish Signals and Systems Conference, 2004, Belfast, Northern Ireland.

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Abstract

A simplified in vivo near infrared spectroscopy (NIRS) system for functional brain analysis and a protocol for the study of visual evoked potentials in the human brain is presented. A novel NIRS system bases on a simple photon counting technique using a CW light source (laser diode at 780 nm), fibre optodes delivering light to the subject and from the subject to detector, a photomultiplier tube (PMT) for high infra-red (IR) response and the 800 MHz Gated Photon Counter/multichannel scaler (MCS) for data acquisition. A chequerboard stimulus was used to elicit a response signal from the visual cortex. This photon signal arising from the cortical systems of the brain was processed to detect features indicative of the neural processing systems involved.

Item Type: Conference or Workshop Item (Paper)
Keywords: NIR spectroscopy, brain signals, visual evoked potentials, photon counting, biomedical signal processing
Subjects: Science & Engineering > Electronic Engineering
Item ID: 1273
Depositing User: Dr Tomas Ward
Date Deposited: 27 Feb 2009 16:12
Refereed: Yes
URI:

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