Intrinsic Raman spectroscopy
First Claim
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1. A system for measurement of a blood analyte comprising:
- a first light source that emits Raman excitation light;
a second light source;
a probe having a fiber optic light delivery and collection system for coupling the first light source and the second light source onto a region of material having an endogenous blood analyte, the system collecting Raman light and reflected light returning from the region of material;
a detector optically coupled to a proximal end of the probe that detects the collected Raman light and reflected light and generates Raman data and reflected light data; and
a processing system connected to the detector such that the processing system receives the Raman data and the reflected light data, the processing system processing the Raman data, reflected light data and a reference Raman spectrum of one or more blood analytes to provide spectral data indicating a concentration of the endogenous blood analyte in the region of material.
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Abstract
The present invention relates to systems and methods for the measurement of analytes such as glucose. Raman and reflectance spectroscopy are used to measure a volume, of material such as a blood sample or tissue within a subject and determine a concentration of a blood analyte based thereon. The present invention further relates to a calibration method, constrained regularization (CR), and demonstrates its use for analyzing spectra including, for example, the measurement glucose concentrations using transcutaneous Raman spectroscopy.
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Citations
70 Claims
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1. A system for measurement of a blood analyte comprising:
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a first light source that emits Raman excitation light; a second light source; a probe having a fiber optic light delivery and collection system for coupling the first light source and the second light source onto a region of material having an endogenous blood analyte, the system collecting Raman light and reflected light returning from the region of material; a detector optically coupled to a proximal end of the probe that detects the collected Raman light and reflected light and generates Raman data and reflected light data; and a processing system connected to the detector such that the processing system receives the Raman data and the reflected light data, the processing system processing the Raman data, reflected light data and a reference Raman spectrum of one or more blood analytes to provide spectral data indicating a concentration of the endogenous blood analyte in the region of material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A method of measuring a blood analyte comprising:
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illuminating a material with light from a first light source and a second light source; detecting a Raman spectrum and a reflectance spectrum from the material in response to the illuminating light; and processing the detected Raman spectrum and the reflectance spectrum to provide a processed spectrum to measure an endogenous blood analyte within the material, the processing step including calculating a regularized spectrum using a reference Raman spectrum of one or more blood analytes. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47)
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48. A system for measurement of a blood analyte comprising:
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a first light source that emits a Raman excitation light; a second light source; an optical delivery system for coupling the first light source and the second light source through skin of a subject onto a region of material having an endogenous blood analyte; an optical collection system that collects Raman and reflected light returning from the region in response to the Raman excitation light and light incident on the region from the second light source; a detector that detects the collected Raman and reflected light to generate Raman data and reflected light data; and a processing system connected to the detector such that the processing system processes the Raman data, the reflected light data and a reference Raman spectrum of one or more blood analytes to measure the endogenous blood analyte. - View Dependent Claims (49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70)
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Specification