Lebid, S and O'Neill, Ray and Markham, Charles and Ward, Tomas and Coyle, S
Functional Brain Signals: A photon counting system for brain
In: IEE Irish Signals and Systems Conference, 2004, Belfast, Northern Ireland.
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.
Conference or Workshop Item
||NIR spectroscopy, brain signals, visual evoked
potentials, photon counting, biomedical signal processing
||Science & Engineering > Electronic Engineering
Dr Tomas Ward
||27 Feb 2009 16:12
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