NIRS device with optical wavelength and path length correction
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United States of America Patent
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Mar 6, 2018
Grant Date -
Oct 24, 2013
app pub date -
Apr 18, 2012
filing date -
Apr 18, 2012
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Abstract
A near infrared spectrometer and method for wavelength and path length correction are disclosed. The spectrometer includes a number of photodiodes that transmit broadband near infrared measurement light into the tissue and at least one broadband detector which measures the light signal transmitted through the tissue. A processor estimates chromophore concentrations through a comparison of measured light attenuation and modeled light attenuation. The light attenuation model utilizes a light path length distribution derived from a Monte Carlo model and accounts for the spectral shape of the light source as a function of temperature.
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