Method and system for determining the contribution of hemoglobin and myoglobin to in vivo optical spectra
First Claim
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1. A method comprising:
- detecting an optical spectra from in vivo tissue;
receiving a calibration spectra;
determining a peak position based on the optical spectra between a spectral peak for hemoglobin and a spectral peak for myoglobin based on the calibration spectra; and
calculating a ratio of Hb and Mb in the tissue based on the peak position.
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Abstract
This document discusses, among other things, quantification of hemoglobin content, and therefore blood volume, of muscle. An analysis of the optical spectra can determine the ratio of hemoglobin (Hb) to myoglobin (Mb) content in intact muscle. The peak position of the in vivo optical spectra from intact tissue is used to determine the ratio of Hb to Mb contributing to the optical signal. The wavelength of the peak is a linear function of the percent contribution of Hb to the optical spectra. Such analysis in combination with known Mb concentrations yields a non-invasive measure of the Hb content for in vivo muscle.
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Citations
22 Claims
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1. A method comprising:
- detecting an optical spectra from in vivo tissue;
receiving a calibration spectra;
determining a peak position based on the optical spectra between a spectral peak for hemoglobin and a spectral peak for myoglobin based on the calibration spectra; and
calculating a ratio of Hb and Mb in the tissue based on the peak position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- detecting an optical spectra from in vivo tissue;
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9. A system comprising:
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a data receiver configured to receive data corresponding to optical spectra of in vivo tissue; a memory device configured to store the data and configured to store calibration spectra; and a processor coupled to the memory device and configured to execute instructions to determine a peak position in the data and generate a ratio of hemoglobin and myoglobin based on the peak position relative to a spectral peak for hemoglobin and a spectral peak for myoglobin based on the calibration spectra. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A method comprising:
- detecting an optical spectra from intact biological tissue;
determining a spectral shift in a peak position between a spectral peak for hemoglobin and a spectral peak for myoglobin in the optical spectra; and
determining a ratio of hemoglobin and myoglobin in the tissue based on the spectral shift. - View Dependent Claims (19, 20, 21, 22)
- detecting an optical spectra from intact biological tissue;
Specification