This report refers to our newly developed OMM-2000 optical multichannel oxygen monitoring system, specifically developed for noninvasive medical diagnosis, such as the diagnosis and research of brains. This system is equipped with up to 16 pairs of CW (continuous-wave) laser diodes as light source, that emit lights of 780, 805, and 830 nm, up to 16 detectors, and a flexible data acquisition system that permits simultaneous 64-channel processing of data obtained from the system having the above-mentioned light sources and detectors. The diagnosis or research is carried out using up to 64 combinations of light sources and detectors, selected out of 256 combinations. Near-infrared rays enter human tissues through optical fibers, migrate in the tissues and they are reflected back from the tissues. The refrected rays carry useful information on the tissues of interest, especially on the blood, are collected via optical fibers. The informative signals carried by the rays are then converted into topographical images within as short as 0.1 second. The image data thus obtained provide useful information on the oxygen metabolism and on the time-course changes of oxygen contents.
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