Patent ID: 7640140

Claim:
A method for processing near-infrared tissue measurements to provide a calibration model for noninvasive estimation of a biological parameter, comprising the steps of: noninvasively collecting a set of spectra with an analyzer; removing gross outliers from said spectra to yield outlier removed spectra; processing said outlier removed spectra to yield enhanced spectra; removing background interference from said enhanced spectra to yield background corrected spectra; and generating a calibration model using said background corrected spectra, wherein said step of processing comprises the step of: filtering said spectra with any of: an infinite-impulse response filter; and a finite-impulse response filter wherein said step of filtering comprises use of any of: a low-pass filter; and a high-pass filter, and wherein said high-pass filter comprises a break frequency determined via any of: a harmonic analysis of net analysis signal; and empirically through an exemplary set of data.