Patent application number | Description | Published |
20090171226 | SYSTEM AND METHOD FOR EVALUATING VARIATION IN THE TIMING OF PHYSIOLOGICAL EVENTS - In embodiments, methods and systems are provided for the calculation of one or more indices representing variability in the timing of events in a signal representing a physiological parameter. In embodiments, the method and system may utilize an infinite impulse response formulation for the calculation of the indices to minimize memory and computational overhead, while additionally making the indices more responsive to newer measurements. | 07-02-2009 |
20090187085 | System And Method For Estimating Physiological Parameters By Deconvolving Artifacts - There is disclosed a system and methods to estimate physiological parameters. In accordance with embodiments a method is disclosed which includes generating distribution data for a plurality of signals. The method may also include deconvolving one of the plurality of signals from the other plurality of signals to produce clean signals. The clean signals may then be used to calculate physiological parameters. | 07-23-2009 |
20090247083 | Wavelength Selection And Outlier Detection In Reduced Rank Linear Models - There is provided an optimization system and method for identifying useful channels. The method for selecting useful channels includes embedding a discrete predictor problem into continuous space of a predictor preweighting and executing an optimization algorithm to optimize a preweighting vector, wherein the optimization algorithm determines the relative importance of the each predictor. Also, the method includes constructing n different models, wherein a k | 10-01-2009 |
20090247844 | Detecting Chemical Components From Spectroscopic Observations - Embodiments disclosed herein may include methods and systems capable of estimating the underlying concentrations of chromophores in a sample. The photon scattering and absorption model may be based on Laplace and stable distributions, which may reveal that measurements in diffuse reflectance may follow a Beer-Lambert and Kohlrausch-Williams-Watts (KWW) product. This Beer-Lambert portion of the product may dominate in high absorption sample areas, while the KWW portion of the product may dominate in low absorption sample areas. | 10-01-2009 |
20090247845 | System And Method For Estimating Blood Analyte Concentration - There is provided a system and method for estimating blood analyte concentration using a non-invasive medical device. The method includes detecting light from a plurality of light sources and generating signals representative of observed absorption of the light from the plurality of light sources. Blood analyte concentrations are then estimated using support vector regression analysis. | 10-01-2009 |
20090248320 | System And Method For Unmixing Spectroscopic Observations With Nonnegative Matrix Factorization - Systems and methods for unmixing spectroscopic data using nonnegative matrix factorization during spectrographic data processing are provided according to various embodiments. In an embodiment, a method of processing spectrographic data may include receiving optical absorbance data associated with a sample and iteratively computing values for component spectra using nonnegative matrix factorization. The values for component spectra may be iteratively computed until optical absorbance data is approximately equal to a Hadamard product of a pathlength matrix and a matrix product of a concentration matrix and a component spectra matrix. The method may also include iteratively computing values for pathlength using nonnegative matrix factorization, in which pathlength values may be iteratively computed until optical absorbance data is approximately equal to a Hadamard product of the pathlength matrix and the matrix product of the concentration matrix and the component spectra matrix. | 10-01-2009 |
20120143026 | SYSTEM AND METHOD FOR PROBABILITY BASED DETERMINATION OF ESTIMATED OXYGEN SATURATION - Present embodiments include providing an initial estimate of a value representative of a blood flow characteristic at a current timestep, and determining a probability distribution of transition, wherein the probability distribution of transition includes potential values of the blood flow characteristic at the current timestep with associated probabilities of occurrence based solely on the initial estimate. Present embodiments further include obtaining an initial measurement of the blood flow characteristic, and determining a probability distribution of measured values, wherein the probability distribution of measured values includes potential values of the blood flow characteristic at the current timestep with associated probabilities of occurrence based on the initial measurement. Further, present embodiments include combining the probability of distribution of transition with the probability of distribution of measured values to determine a meaningful blood flow characteristic value, and posting the meaningful blood flow characteristic value. | 06-07-2012 |
20130024129 | DETECTING CHEMICAL COMPONENTS FROM SPECTROSCOPIC OBSERVATIONS - Embodiments disclosed herein may include methods and systems capable of estimating the underlying concentrations of chromophores in a sample. The photon scattering and absorption model may be based on Laplace and stable distributions, which may reveal that measurements in diffuse reflectance may follow a Beer-Lambert and Kohlrausch-Williams-Watts (KWW) product. This Beer-Lambert portion of the product may dominate in high absorption sample areas, while the KWW portion of the product may dominate in low absorption sample areas. | 01-24-2013 |
20140018651 | SYSTEM AND METHOD FOR PROBABILITY BASED DETERMINATION OF ESTIMATED OXYGEN SATURATION - Present embodiments include providing an initial estimate of a value representative of a blood flow characteristic at a current timestep, and determining a probability distribution of transition, wherein the probability distribution of transition includes potential values of the blood flow characteristic at the current timestep with associated probabilities of occurrence based solely on the initial estimate. Present embodiments further include obtaining an initial measurement of the blood flow characteristic, and determining a probability distribution of measured values, wherein the probability distribution of measured values includes potential values of the blood flow characteristic at the current timestep with associated probabilities of occurrence based on the initial measurement. Further, present embodiments include combining the probability of distribution of transition with the probability of distribution of measured values to determine a meaningful blood flow characteristic value, and posting the meaningful blood flow characteristic value. | 01-16-2014 |