Method for building an algorithm for converting spectral information
First Claim
1. A method for building an algorithm for converting spectral information obtained from body tissue into the concentration of an analyte in at least one body fluid in the body tissue, the method comprising the acts of:
- modulating the concentration of the analyte in at least one body fluid in the body tissue to a plurality of predetermined levels within a range of predetermined analyte concentration levels;
directing infrared light onto the body tissue of at least one test subject being analyzed during an analyte clamping test;
collecting spectral information from the body tissue;
collecting data other than spectral information from the body tissue of the at least one test subject during the modulating of the concentration of the analyte in at least one body fluid in the body tissue;
modeling spectral information corresponding to analyte concentration levels outside the range of analyte concentration levels; and
filtering the collected and modeled spectral information to remove non-analyte spectral information using one or more chemometric techniques selected from the group consisting of wavelets analysis, orthogonal signal correction, partial least squares regression, principal components analysis, and genetic algorithms.
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Abstract
A system for determining the concentration of an analyte in at least one body fluid in body tissue comprises an infrared light source, a body tissue interface, a detector, and a central processing unit. The body tissue interface is adapted to contact body tissue and to deliver light from the infrared light source to the contacted body tissue. The detector is adapted to receive spectral information corresponding to infrared light transmitted through the portion of body tissue being analyzed and to convert the received spectral information into an electrical signal indicative of the received spectral information. The central processing unit is adapted to compare the electrical signal to an algorithm built upon correlation with the analyte in body fluid, the algorithm adapted to convert the received spectral information into the concentration of the analyte in at least one body fluid.
71 Citations
10 Claims
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1. A method for building an algorithm for converting spectral information obtained from body tissue into the concentration of an analyte in at least one body fluid in the body tissue, the method comprising the acts of:
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modulating the concentration of the analyte in at least one body fluid in the body tissue to a plurality of predetermined levels within a range of predetermined analyte concentration levels; directing infrared light onto the body tissue of at least one test subject being analyzed during an analyte clamping test; collecting spectral information from the body tissue; collecting data other than spectral information from the body tissue of the at least one test subject during the modulating of the concentration of the analyte in at least one body fluid in the body tissue; modeling spectral information corresponding to analyte concentration levels outside the range of analyte concentration levels; and filtering the collected and modeled spectral information to remove non-analyte spectral information using one or more chemometric techniques selected from the group consisting of wavelets analysis, orthogonal signal correction, partial least squares regression, principal components analysis, and genetic algorithms. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification