Abstract
The author's group has proposed Optical Topography (OT) applying near-infrared spectroscopy ahead of everyone else in the world. OT has enabled measurements of changes in hemoglobin concentrations in brain tissue just by placing the cap fixing the optical fibers on the head. Also, the OT system has particular features that other conventional modalities do not have in measuring brain functions. We summarize basic principles, actual examples of brain function measurement results and an improvement strategy of spatial resolution in this report.
