Abstract
Optical topography, which visualizes brain activation, has been developed over the last several years. It uses near-infrared light to measure the blood-volume change associated with the brain activation in the cortex. The changes are measured at plural points, and topographic images, which show the distributions of the blood volume change, are obtained. In the current study, such optical topography was used to measure brain-functions. To improve spatial resolution of the topographical image, high-density optical fiber arrangement was proposed. Phantom experiment shows that the spatial resolution is improved by the high-density measurement.
