Signal and image processing techniques for functional near-infrared imaging of the human brain

摘要

Near-infrared spectro-imaging (NIRSI) is a quickly developing method for the in-vivo imaging of biological tissues. Inrnparticular, it is now extensively employed for imaging the human brain. In this non-invasive technique, the informationrnabout the brain is obtained from the analysis of spatial light bundles formed by the photons traveling from light sourcesrnto detectors placed on the surface of the head. Most significant problems in the functional brain NIRSI are the separationrnof the brain information from the physiological noise in non-cerebral tissues, and the localization of functional signals.rnIn this paper we describe signal and image processing techniques we developed in order to measure two types ofrnfunctional cerebral signals: the hemodynamic responses, and neuronal responses.