Abstract: The functional near-IR imager is made of 9 light sources and 4 pairs detectors. Each pair detector was filtered by two wavelengths. The light sources are controlled by a computer and the signals from the detectors are filtered, converted and processed by the computer. Functional near IR imager could resolve the brain activity temporally and spatially. The spatial resolution is determined by the detection structure and the temporal resolution is determined by the light sources and signal conversion time. !7
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