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- W3149781107 abstract "ichal Kacprzak dam Liebert iotr Sawosz orbert Żolek oman Maniewski nstitute of Biocybernetics and Biomedical Engineering rojdena 4 2-109 Warsaw, Poland -mail: michal.kacprzak@ibib.waw.pl Abstract. A time-resolved optical instrument allowing for noninvasive assessment of cerebral oxygenation is presented. The instrument is equipped with picosecond diode lasers, fast photodetectors, and timecorrelated single photon counting electronics. This technology enables depth-resolved estimation of changes in absorption and, in consequence, assessment of changes in hemoglobin concentrations in the brain cortex. Changes in oxyhemoglobin HbO2 and deoxyhemoglobin Hb can be evaluated selectively in extraand intracerebral tissue compartments using the moments of distributions of times of flight of photons measured at two wavelengths in the near-infrared region. The combination of the data acquired from multiple sources and detectors located on the surface of the head with the depth-resolved analysis, based on the moments, enables imaging of cortex oxygenation. Results of the tests on physical phantoms as well as in vivo validation of the instrument during the motor stimulation experiment are presented. © 2007 Society of Photo-Optical Instrumentation Engineers. DOI: 10.1117/1.2743964" @default.
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- W3149781107 date "2007-01-01" @default.
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- W3149781107 title "ime-resolved optical imager for assessment of cerebral xygenation" @default.
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