Identifying or measuring selected substances or toxins in a subject using resonant raman signals
First Claim
1. A non-invasive method for identifying the presence of and/or the concentration of a selected analyte in a subject, comprising:
- illuminating an aqueous humor of a subject with an optical excitation beam, wherein the excitation beam wavelength is selected to generate a resonant Raman spectrum of the selected analyte;
detecting a resonant Raman spectrum corresponding to the illuminated aqueous humor; and
identifying the presence, absence and/or the concentration of the selected analyte in the subject based on said detecting step.
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Abstract
Methods and systems of the present invention identify the presence of and/or the concentration of a selected analyte in a subject by: (a) illuminating a selected region of the eye of a subject with an optical excitation beam, wherein the excitation beam wavelength is selected to generate a resonant Raman spectrum of the selected analyte with a signal strength that is at least 100 times greater than Raman spectrums generated by non-resonant wavelengths and/or relative to signals of normal constituents present in the selected region of the eye; (b) detecting a resonant Raman spectrum corresponding to the selected illuminated region of the eye; and (c) identifying the presence, absence and/or the concentration of the selected analyte in the subject based on said detecting step. The apparatus may also be configured to be able to obtain biometric data of the eye to identify (confirm the identity of) the subject.
89 Citations
61 Claims
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1. A non-invasive method for identifying the presence of and/or the concentration of a selected analyte in a subject, comprising:
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illuminating an aqueous humor of a subject with an optical excitation beam, wherein the excitation beam wavelength is selected to generate a resonant Raman spectrum of the selected analyte;
detecting a resonant Raman spectrum corresponding to the illuminated aqueous humor; and
identifying the presence, absence and/or the concentration of the selected analyte in the subject based on said detecting step. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A non-invasive method for identifying the presence of and/or the concentration of a selected analyte in a subject, comprising:
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illuminating a selected region in the eye of a subject with an optical excitation beam, wherein the excitation beam wavelength is selected to generate a resonant Raman spectrum of the selected analyte;
detecting a resonant Raman spectrum corresponding to the selected illuminated region of the eye; and
identifying the presence, absence and/or the concentration of the selected analyte in the subject based on said detecting step, wherein the detecting step is carried out to obtain a first resonant Raman spectrum of the subject before administering a selected treatment and then to obtain a second resonant spectrum after administration of the selected treatment, and wherein the identifying step comprises subtracting baseline signatures of data from the second resonant Raman spectrum using data from the first resonant Raman spectrum.
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18. An evaluation apparatus for identifying the presence and/or concentration of a selected analyte in a subject, comprising:
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means for illuminating an aqueous humor with an optical excitation beam, wherein the optical excitation beam has a wavelength that is at least about 400 nm, resides within the absorption spectrum, and that generates a resonant Raman spectrum of a selected analyte in the aqueous humor of a subject;
means for focusing the excitation beam into the subject so that the aqueous humor is illuminated;
means for detecting a resonant Raman spectrum of the selected analyte from the illuminated aqueous humor; and
means for identifying the presence and/or concentration of the selected analyte in the subject based on data obtained from the detecting means. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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36. An evaluation apparatus for identifying the presence and/or concentration of a selected analyte in a subject, comprising:
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means for illuminating a selected region of the eye with an optical excitation beam, wherein the optical excitation beam has a wavelength that is at least about 400 nm, resides within the absorption spectrum, and that generates a resonant Raman spectrum of a selected analyte in a subject;
means for focusing the excitation beam into a selected region in the eve of the subject so that the selected region is illuminated;
means for detecting a resonant Raman spectrum corresponding to the illuminated selected region of the eye; and
means for identifying the presence and/or concentration of the selected analyte in the subject responsive to the detecting means wherein the means for identifying comprises computer program code that competes a first resonant Raman spectrum of the subject taken before administering a selected treatment to a second resonant Raman spectrum taken after administration of the selected treatment, and subtracts baseline signature data from the second resonant Raman spectrum using data from the first resonant Raman spectrum.
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49. A non-invasive method for identifying the presence and/or the concentration of a selected analyte in a subject and identifying the subject comprising:
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illuminating an aqueous humor of a subject with an optical excitation beam;
detecting a resonant Raman spectrum corresponding to the aqueous humor;
determining the presence, absence and/or the concentration of the selected analyte in the subject based on said detecting step;
obtaining a biometric reading of the iris or retinal structure of at least one of the subject'"'"'s eyes; and
identifying the subject based on the biometric reading. - View Dependent Claims (50)
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51. An apparatus for determining the presence of and/or the concentration of a selected analyte in a subject and confirming the identity the subject comprising:
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means for illuminating an aqueous humor of a subject with an optical excitation beam;
means for detecting a resonant Raman spectrum corresponding to the aqueous humor;
means for determining the presence and/or the concentration of the selected analyte in the subject responsive to said means for detecting; and
means for obtaining a biometric reading of the iris or retinal structure to identify the subject.
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52. A portable apparatus for determining the presence of and/or the concentration of a selected analyte in a subject and confirming the identity the subject comprising:
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a portable housing;
an illumination source in the housing configured to generate an optical excitation beam into an aqueous humor of a subject;
a detector in the housing configured to obtain a resonant Raman spectrum from the aqueous humor and determine the presence and/or the concentration of a selected analyte in the subject; and
a biometric reader in the housing configured to interrogate an iris or retinal structure of the eye of the subject to identify the subject. - View Dependent Claims (53)
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54. A non-invasive method for identifying the presence of and/or the concentration of a selected analyte in a subject, comprising:
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illuminating a vitreous humor of a subject with an optical excitation beam, wherein the excitation beam wavelength is selected to generate a resonant Raman spectrum of the selected analyte;
detecting a resonant Raman spectrum corresponding to the illuminated vitreous humor; and
identifying the presence, absence and/or the concentration of the selected analyte in the subject based on said detecting step. - View Dependent Claims (55, 56, 57, 58, 59, 60, 61)
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Specification