Method for laser induced fluorescence of tissue
First Claim
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1. A method of irradiating chromophores in endogenous tissue to identify tissue composition comprising:
- selecting a known excitation wavelength of the chromophore within a range of wavelengths at which the chromophore undergoes fluorescence;
irradiating the endogeneous tissue with radiation having at least the selected excitation wavelength within the range;
detecting a fluorescence emission of the tissue resulting from the irradiation thereof;
analyzing the detected emission to determine the presence of the chromophore in the tissue;
forming an attenuation spectrum for a tissue component; and
modulating the detected emission with the attenuation spectrum.
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Abstract
A method for laser induced fluorescence of tissue in which laser radiation is used to illuminate and induce fluorescence in the tissue under study to determine the chemical composition or pathologic condition of tissue. The laser radiation and the retrieved fluorescing radiation can be conveyed through a catheter using an array of optical fiber. The fluorescence spectrum of the tissue can be displayed and analyzed to obtain information regarding the chemical composition and medical condition of the tissue inside the human body.
410 Citations
17 Claims
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1. A method of irradiating chromophores in endogenous tissue to identify tissue composition comprising:
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selecting a known excitation wavelength of the chromophore within a range of wavelengths at which the chromophore undergoes fluorescence; irradiating the endogeneous tissue with radiation having at least the selected excitation wavelength within the range; detecting a fluorescence emission of the tissue resulting from the irradiation thereof; analyzing the detected emission to determine the presence of the chromophore in the tissue; forming an attenuation spectrum for a tissue component; and modulating the detected emission with the attenuation spectrum. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of irradiating chromophores in endogenous tissue to identify tissue composition comprising:
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selecting a known excitation wavelength of the chromophore within a range of wavelengths at which the chromophore undergoes fluorescence; irradiating the endogeneous tissue with radiation having at least the selected excitation wavelength within the range; detecting a fluorescence emission of the tissue resulting from the irradiation thereof; analyzing the detected emission to determine the presence of the chromophore in the tissue, including separating a component of the emission resulting from reabsorption by the tissue. - View Dependent Claims (14, 15, 16)
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17. A method of irradiating chromophores in endogenous tissue to identify tissue composition comprising:
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selecting a known excitation wavelength of the chromophore within a range of wavelengths at which the chromophore undergoes fluorescence; inserting a fiber optic probe into the body of a patient; irradiating the endogeneous tissue with the fiber optic probe using radiation having at least the selected excitation wavelength within the range; detecting a fluorescence emission of the tissue resulting from the irradiation thereof; analyzing the detected emission to determine the presence of the chromophore in the tissue; and determining the concentration of the chromophore within the tissue.
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Specification